JP6487993B2 - Ophthalmic equipment - Google Patents

Description

  The present invention relates to an ophthalmologic apparatus provided with a measurement unit.

  In the ophthalmologic apparatus, the first measuring unit set to the first set working distance and the second measuring unit set to the second set working distance shorter than the first set working distance are provided. An ophthalmologic apparatus has been proposed (see, for example, Patent Document 1). In this ophthalmologic apparatus, an intraocular pressure measuring unit in which the second set working distance is set to a very small value is provided as the second measuring unit, and the first set working distance is a relatively large value as the first measuring unit. The other eye characteristic measuring unit is provided. In the ophthalmologic apparatus, the face of the subject, that is, the subject's eye is fixed by pressing the subject's forehead against the forehead, and the first measurement unit or the second measurement unit is appropriately measured with respect to the subject's eye. Each measurement is performed by moving it to a position where it can be performed.

  Here, in the composite ophthalmic apparatus as described above, the second measurement unit is integrally provided above the first measurement unit, and the positional relationship between the first measurement unit and the second measurement unit is fixed. Some are configured to be movable. In such a composite-type ophthalmologic apparatus, the difference between the first set working distance and the second set working distance is used to cause the second measuring unit to protrude forward from the first measuring unit, that is, toward the subject. It is conceivable to have a configuration. With this arrangement, when the eye to be examined is measured using the second measurement unit positioned above, the first measurement unit may or may not contact the subject's nose or mouth. This is because the first measurement unit can prevent the subject from being cramped.

JP 2010-148589 A

  However, in the above-described composite-type ophthalmologic apparatus, when the first measurement unit is moved forward when the eye to be examined is measured using the first measurement unit located below, the second is located above and forward. A measurement part (the tip) approaches a forehead part located above the eye to be examined. For this reason, depending on the position setting and the amount of movement, the second measuring unit (the tip thereof) interferes with the forehead portion or when the hand is put on the forehead portion without interference. There is a risk of getting caught.

  The present invention has been made in view of the above circumstances, and it is possible to prevent the measurement unit from interfering with the forehead holding unit and prevent the hand hung on the forehead holding unit from being pinched by the measurement unit. An object of the present invention is to provide an ophthalmic device that can be used.

  In order to solve the above-described problem, the ophthalmologic apparatus according to claim 1 includes a measuring unit that measures the subject's eye and a main body that is provided with the measuring unit and is movable with respect to the base. Control unit, a drive unit that moves the apparatus main body with respect to the base, a forehead portion provided on the base to receive the subject's forehead, the measurement unit, and the drive unit A control unit, wherein the control unit includes a first front position in the apparatus main body unit having a first interval between the measurement unit and the forehead unit, and the measurement unit and the forehead unit. It is possible to detect a second front position in the apparatus main body that has a second interval that is larger than the first interval, and the control unit moves the apparatus main body to the forehead portion side. When the device main body reaches the second front position, a warning is issued, Okimoto body portion, characterized in that the stop moving to the amount hook part side of the apparatus body and reaches the first forward position.

  The ophthalmologic apparatus according to claim 2 is the ophthalmologic apparatus according to claim 1, wherein the control unit temporarily stores the apparatus main body when the apparatus main body reaches the second front position and issues a warning. The movement of the portion to the forehead portion side is stopped.

  The ophthalmologic apparatus according to claim 3 is the ophthalmologic apparatus according to claim 1 or 2, and further detects that the apparatus main body portion is in the first front position or the second front position, A forward position detection unit that outputs the detection result to the control unit is provided.

  The ophthalmologic apparatus according to claim 4 is the ophthalmologic apparatus according to claim 1 or 2, wherein the second measuring unit receives reflected light and thereby the eye to be examined in a direction toward the eye to be examined. And the control unit determines that the hand placed on the forehead portion is approaching based on the amount of reflected light in the detection optical system. It is detected that the main body has reached the second front position.

  The ophthalmologic apparatus according to claim 5 is the ophthalmologic apparatus according to claim 1 or 2, wherein the second measuring unit receives reflected light and thereby the eye to be examined in a direction toward the eye to be examined. A detecting optical system that can detect the position of the forehead, wherein the forehead portion sets the reflectance of the surface facing the second measuring portion to be lower than the reflectance of the hand, and the control portion is configured to detect the detection optics. When the amount of reflected light received by the system exceeds a detection threshold set to detect that the hand is approaching, it is detected that the apparatus main body has reached the second front position. .

  The ophthalmologic apparatus according to claim 6 is the ophthalmologic apparatus according to any one of claims 1 to 5, wherein the ophthalmologic apparatus has a protruding shape that protrudes toward the eye to be examined. .

  According to the ophthalmologic apparatus of the present invention, it is possible to prevent the measuring unit from interfering with the forehead holding unit and to prevent the hand hung on the forehead holding unit from being pinched by the measuring unit.

  A first measurement unit set at a first set working distance for measuring the subject's eye, and a second set working distance shorter than the first set working distance for measuring the subject eye. And a second measurement unit integrally provided above the first measurement unit, and the apparatus main body unit provided with the first measurement unit and the second measurement unit and movable with respect to the base A drive unit that moves the apparatus main body relative to the base, a forehead portion provided on the base to receive the forehead of the subject, the first measurement unit, and the second measurement unit A control unit that controls the drive unit, wherein the control unit has a first front position in the apparatus main body unit having a first interval between the second measurement unit and the forehead portion, and The device book having a second interval larger than the first interval between the second measuring unit and the forehead portion The second forward position in the unit can be detected, and the control unit warns when the apparatus main body reaches the second front position when moving the apparatus main body toward the forehead portion. According to the ophthalmologic apparatus that stops the movement of the apparatus main body portion toward the forehead portion when the device main body portion reaches the first forward position, the second measurement unit interferes with the forehead portion. While preventing, it can prevent that the hand hung on the forehead holding part is pinched by the second measuring part.

  In addition to the above-described configuration, the second interval is more reliably set from the viewpoint of preventing a hand positioned between the second measurement unit and the forehead portion from being sandwiched. Further, it is possible to prevent a hand from being caught between the second measuring unit and the forehead holding unit.

  In addition to the above-described configuration, if the first interval is set from the viewpoint of setting a small value while preventing the second measurement unit and the forehead portion from interfering with each other, the second interval is surely Interference between the measurement unit and the forehead holding unit can be prevented, and a decrease in the movable range of the apparatus main body unit can be prevented.

  In addition to the above-described configuration, when the notification function for issuing a warning is disabled, the control unit does not issue a warning even when the apparatus main body reaches the second front position. Usability can be improved.

  In addition to the above-described configuration, the control unit further includes a hand detection unit capable of detecting that a hand is placed on the forehead holding unit, and the control unit is configured such that the hand detection unit is placed on the forehead holding unit. If it is determined that the notification function has been invalidated, it is determined that the notification function has been disabled, and only when the hand is actually placed on the forehead without any particular setting by the examiner. When the unit reaches the second front position, a warning can be issued, and usability can be further improved.

  In addition to the configuration described above, the control unit temporarily stops the movement of the device main body toward the forehead portion when the device main body reaches the second front position and issues a warning. Then, even if the forehead department is handed over, safety is ensured by the examiner releasing his hand from the forehead department or stopping the subject from placing his hand on the forehead department. Can be performed with a margin, and usability can be further improved.

  In addition to the above-described configuration, the apparatus further includes a front position detection unit that detects that the apparatus main body has been set to the first front position or the second front position and outputs the detection result to the control unit. As a result, it is possible to reliably detect that each front position has been reached with a simple configuration.

  In addition to the above-described configuration, the second measurement unit includes a detection optical system capable of detecting the position of the eye to be examined in a direction toward the eye by receiving reflected light, and the control unit includes Detecting that the device main body has reached the second front position by determining that the hand placed on the forehead portion is approaching based on the amount of reflected light in the detection optical system; Then, it is possible to detect both that the apparatus main body has reached the second front position and that the forehead portion is being handed at once. For this reason, usability can be improved more. In addition, since the detection optical system provided for the measurement by the second measurement unit is used, the configuration can be simplified and can be easily applied to an existing apparatus.

  In addition to the above-described configuration, in the forehead portion, if the reflectance of the surface facing the second measurement portion is different from the reflectance of the hand, the forehead portion is handed. Can be judged more appropriately.

  In addition to the above-described configuration, the second measurement unit includes a detection optical system capable of detecting the position of the eye to be examined in a direction toward the eye by receiving reflected light, and the forehead portion Then, the reflectance of the surface facing the second measurement unit is set to be lower than the reflectance of the hand, and the control unit detects that the reflected light quantity received by the detection optical system is approaching the hand. If the detection threshold value set to be exceeded is detected, if it is detected that the device main body has reached the second front position, it is determined that the device main body has reached the second front position and the forehead portion is handled. Both can be detected at once. For this reason, usability can be improved more. In addition, since the detection optical system provided for the measurement by the second measurement unit is used, the configuration can be simplified and can be easily applied to an existing apparatus.

  In addition to the configuration described above, the second measurement unit includes an observation optical system that acquires an image of the anterior segment in a direction toward the eye to be examined, and the control unit acquires the observation optical system. Based on the image of the anterior eye part, it is possible to grasp the presence of the hand hung on the forehead holding part, and by determining that the hand hung on the forehead holding part is approaching, the apparatus main body part If it is detected that the device has reached the second front position, it is possible to detect both that the apparatus main body has reached the second front position and that the forehead portion is being handed. it can. For this reason, usability can be improved more. In addition, since the observation optical system provided for the measurement by the second measurement unit is used, the configuration can be simplified and can be easily applied to an existing apparatus.

It is explanatory drawing which shows typically the structure of the ophthalmologic apparatus 10 of the Example based on this invention. 3 is an explanatory diagram for explaining an optical configuration of an intraocular pressure measurement unit 20 of the ophthalmologic apparatus 10. FIG. FIG. 3 is an explanatory diagram viewed from a direction different from FIG. 2 for describing an optical configuration of an intraocular pressure measurement unit 20 of the ophthalmologic apparatus 10. 4 is an explanatory diagram for explaining an optical configuration of an eye characteristic measurement unit 40 of the ophthalmologic apparatus 10. FIG. It is explanatory drawing for demonstrating a mode that the apparatus main-body part 13 is moved and switching a measurement mode, (a) shows the state made into the intraocular pressure measurement mode, (b) shows the state made into the eye characteristic measurement mode Indicates. It is explanatory drawing for demonstrating height position HL using the positional relationship of the nozzle protrusion part 21h (apparatus main-body part 13) and the forehead holding part 16. FIG. It is explanatory drawing for demonstrating each front position using the positional relationship of the nozzle protrusion part 21h (apparatus main body part 13) and the forehead holding part 16, (a) shows 1st front position FL1, (b) Indicates the second front position FL2, (c) indicates the third front position FL3, and (d) indicates the fourth front position FL4. It is explanatory drawing which shows a mode that the hand H is hung on the forehead holding part 16. FIG. It is a flowchart which shows the safety ensuring alerting | reporting process (safety ensuring alerting | reporting method) performed by the control part 33 in a present Example. It is explanatory drawing for demonstrating a mode that the apparatus main body part 13 detects having reached | attained 2nd front position FL2 using the Z alignment detection optical system 26, (a) is a hand H applied to the forehead holding part 16. (B) shows a state where no hand H is put on the forehead holding portion 16.

  Embodiments of an ophthalmic apparatus according to the present invention will be described below with reference to the drawings.

  An ophthalmologic apparatus 10 as an embodiment of an ophthalmologic apparatus according to the present invention will be described with reference to FIGS. As shown in FIG. 1, the ophthalmologic apparatus 10 includes an intraocular pressure measurement unit 20 that measures the intraocular pressure of the eye E (see FIG. 2 and the like) and an eye that measures other optical characteristics (eye characteristics) of the eye E. And a characteristic measurement unit 40. As for the eye E, FIGS. 2 and 3 show a fundus (retina) Ef, a cornea (anterior eye portion) Ec, and a corneal apex Ea. The ophthalmologic apparatus 10 is configured by providing a base 11 with an apparatus main body 13 via a drive unit 12. The apparatus main body 13 is provided with an intraocular pressure measurement unit 20 and an eye characteristic measurement unit 40 on the inside, and with a display unit 14, a chin rest 15 and a forehead support unit 16 on the outside.

  The display unit 14 is formed of a liquid crystal display, and displays an image such as an anterior segment image of the eye E, a test result, and the like under the control of a control unit 33 (see FIG. 2) described later. In this embodiment, the display unit 14 has a touch panel function, and moves the apparatus main body 13 by an operation for performing measurement using the intraocular pressure measurement unit 20 or the eye characteristic measurement unit 40 or manually. It is possible to perform an operation for this. In addition, the display unit 14 displays a switching icon in each measurement mode to be described later using the function of the touch panel, and enables the switching operation of each measurement mode by touching the switching icon. The operation for performing the measurement may be performed by providing a measurement switch and operating the measurement switch. Further, an operation for moving the apparatus main body 13 may be performed by providing a control lever or a movement operation switch and operating the control lever or the movement operation switch.

  The chin rest 15 and the forehead support 16 fix the face of the subject (patient), that is, the position of the eye E to be measured with respect to the apparatus main body 13, and are fixed to the base 11. ing. The chin receiving portion 15 is a place where the subject places his chin, and the forehead holding portion 16 is a place where the subject places the forehead. In this ophthalmic apparatus 10, the display unit 14, the chin rest 15 and the forehead support 16 are provided on both sides of the apparatus main body 13, and the display unit 14 is inspected during normal use. The chin rest 15 and the forehead support 16 are on the subject side. The display unit 14 is rotatably supported by the apparatus main body unit 13 to change the orientation of the display surface, for example, to direct the display surface toward the subject, or to display the display surface sideways (X-axis). Direction). The apparatus main body 13 moves with respect to the base 11 by the drive unit 12, that is, moves with respect to the eye E (face of the subject) fixed by the jaw holder 15 and the forehead support 16. It is possible to do.

  The drive unit 12 is perpendicular to the vertical direction (Y-axis direction) and the front-rear direction (Z-axis direction (left-right direction when FIG. 1 is viewed from the front)) of the apparatus main body 13 with respect to the base 11. In this embodiment, the upper side in the vertical direction is the positive side in the Y-axis direction, and the subject side in the front-rear direction ( 1 is the positive side in the Z-axis direction, and the front side in FIG. 1 is the front side in the X-axis direction (see the arrow in FIG. 1). Then, the drive part 12 has the Y-axis drive part 12a, the Z-axis drive part 12b, and the X-axis drive part 12c.

  The Y-axis drive portion 12a is provided on the base 11, and moves the apparatus main body 13 in the Y-axis direction (vertical direction) with respect to the base 11 via the Z-axis drive portion 12b and the X-axis drive portion 12c. (Displace). In other words, the Y-axis drive portion 12a is a location for moving the apparatus main body 13 in the Y-axis direction (vertical direction) in the drive unit 12. The Y-axis drive portion 12a has a support column 12d and a Y-axis moving frame 12e. The support column 12d is fixed to the base 11 and extends from the base 11 in the Y-axis direction. The Y-axis moving frame 12e has a frame shape that can surround the support column 12d, and can be moved relative to the Y-axis direction via a Y-axis guide member (not shown). Is attached. The Y-axis moving frame 12e has a movable range in the Y-axis direction with respect to the support column 12d (base 11) at the lowest position in the intraocular pressure measurement unit 20 in an intraocular pressure measurement mode (see FIG. 5A) described later. Set so as to enable positioning on the (negative side) and positioning the eye characteristic measuring unit 40 on the uppermost (positive side) in an eye characteristic measuring mode (see FIG. 5B) described later. Has been.

  In the Y-axis moving frame 12e, although not shown, an elastic member is provided between the Y-axis moving frame 12e and the support column 12d, and a pressing force is applied upward from the elastic member. In this embodiment, the elastic member is formed of a spiral wire, and uses a tension spring that contracts most in an unloaded state and exhibits an elastic force that resists the operation of separating one end and the other end. . That is, the Y-axis moving frame 12e is configured to be suspended from the support column 12d by an elastic member. The Y-axis moving frame 12e is supported on the support column 12d (base 11) via an elastic member in a state where the relative movement direction with respect to the support column 12d (base 11) is defined by the Y-axis guide member in the Y-axis direction. Has been. If the elastic member supports the Y-axis moving frame 12e by applying a pressing force to the support column 12d (base 11) in the Y-axis direction to the Y-axis moving frame 12e, a compression spring is used. It may be used or may have other configurations, and is not limited to this embodiment. The compression spring is constituted by a spiral wire, and exhibits the elastic force that opposes the operation of bringing the one end and the other end close to each other by extending most in an unloaded state. When this compression spring is used, the support column 12d or the base 11 may be configured to support the Y-axis moving frame 12e from below via the compression spring.

  The Y-axis drive portion 12a is provided with a drive force transmission mechanism that applies a moving force to move the Y-axis moving frame 12e in the Y-axis direction with respect to the support column 12d. The Y-axis drive portion 12a applies an upward movement force from the drive force transmission mechanism to the Y-axis movement frame 12e, thereby moving the Y-axis movement frame 12e from the position where the elastic member is balanced to the Y axis direction positive side. By applying a downward moving force to the Y-axis moving frame 12e from the driving force transmission mechanism, the Y-axis moving frame 12e is moved from the position where the elastic members are balanced to the Y-axis direction negative side.

  The Z-axis drive portion 12b is provided on the Y-axis moving frame 12e (Y-axis drive portion 12a), and the apparatus main body 13 is attached to the Y-axis drive portion 12a, that is, the base 11, via the X-axis drive portion 12c. Move (displace) in the Z-axis direction (front-rear direction). In other words, the Z-axis drive portion 12 b is a location for moving the apparatus main body 13 in the Z-axis direction (front-rear direction) in the drive unit 12. The Z-axis drive portion 12b has a Z-axis support base 12f and a Z-axis movement base 12g. The Z-axis support 12f is fixed to the Y-axis moving frame 12e and is moved in the Y-axis direction together with the Y-axis moving frame 12e. The Z-axis support base 12f supports the Z-axis movement base 12g through a Z-axis guide member (not shown) so as to be capable of relative movement in the Z-axis direction. The Z-axis drive portion 12b is provided with a drive force transmission mechanism that applies a moving force that moves the Z-axis moving base 12g in the Z-axis direction with respect to the Z-axis support base 12f. In the Z-axis drive part 12b, the Z-axis moving table 12g is appropriately moved in the Z-axis direction by applying a moving force in the Z-axis direction to the Z-axis moving table 12g from the driving force transmission mechanism.

  The X-axis drive portion 12c is provided on the Z-axis moving base 12g (Z-axis drive portion 12b), and the apparatus body 13 is moved in the X-axis direction (left-right direction) with respect to the Z-axis drive portion 12b, that is, the base 11. Move (displace). In other words, the X-axis drive portion 12 c is configured to move the apparatus main body 13 in the X-axis direction (left-right direction) in the drive unit 12. The X-axis drive portion 12c has an X-axis support base 12h and an X-axis movement base 12i. The X-axis support base 12h is fixed to the Z-axis movement base 12g and is moved in the Z-axis direction together with the Z-axis movement base 12g. The X-axis support base 12h supports the X-axis movement base 12i through an X-axis guide member (not shown) so that relative movement in the X-axis direction is possible. The X-axis drive portion 12c is provided with a drive force transmission mechanism that applies a moving force that moves the X-axis moving base 12i in the X-axis direction with respect to the X-axis support base 12h. In the X-axis drive part 12c, the X-axis moving table 12i is appropriately moved in the X-axis direction by applying a moving force in the X-axis direction to the X-axis moving table 12i from the driving force transmission mechanism. The X-axis moving base 12i is provided with an apparatus main body 13 through an attachment board (not shown) to which an intraocular pressure measurement unit 20 and an eye characteristic measurement unit 40 provided on the inside of the apparatus main body 13 are attached. Is fixed.

  For this reason, the drive unit 12 appropriately drives the Y-axis drive part 12a, the Z-axis drive part 12b, and the X-axis drive part 12c, thereby moving the apparatus main body part 13 in the vertical direction (Y-axis direction) relative to the base 11. , And can be appropriately moved in the front-rear direction (Z-axis direction) and the left-right direction (X-axis direction). In the drive unit 12, although not shown clearly, the Y-axis drive part 12a, the Z-axis drive part 12b, and the X-axis drive part 12c are connected to the control unit 33 (see FIG. 2), respectively. Are driven under the control of the control unit 33. The control unit 33 constitutes an electric control system in the ophthalmologic apparatus 10 and comprehensively controls each unit of the ophthalmologic apparatus 10 by a program stored in a built-in storage unit.

  Although not shown in FIG. 1 for ease of understanding, the ophthalmic apparatus 10 is provided with a cover member that forms the overall outer shape, from the base 11 to the apparatus main body 13 through the drive unit 12. Is covered by the cover member. In FIG. 1, in the drive unit 12, the Y-axis drive portion 12a, the Z-axis drive portion 12b, and the X-axis drive portion 12c are shown stacked in the Y-axis direction, but are completely divided in the Y-axis direction. However, the components are configured to overlap each other when viewed in a direction orthogonal to the Y-axis direction. For this reason, in the drive unit 12, that is, the ophthalmologic apparatus 10, it is possible to appropriately move the apparatus main body 13 with respect to the base 11 while preventing an increase in the height dimension (size as viewed in the Y-axis direction). Has been.

  The apparatus main body 13 is provided with an intraocular pressure measurement unit 20 and an eye characteristic measurement unit 40 inside. The ocular characteristic measurement unit 40 constitutes a first measurement unit having a first set working distance d1 (see FIG. 5B), and the intraocular pressure measurement unit 20 has a second shorter than the first set working distance. A second measuring unit having a set working distance d2 (see FIG. 5A) is configured. Each working distance is a distance that enables the measurement of the eye E to be performed by each measurement unit, and is indicated by a distance (interval) from the tip of each measurement unit to the eye E. The intraocular pressure measurement unit 20 is used when measuring the intraocular pressure of the eye E. The eye characteristic measuring unit 40 measures optical characteristics (eye characteristics) of the eye E, and in this embodiment, the shape of the cornea Ec of the eye E and the eye refractive power (spherical power, astigmatism) of the eye E are measured. Frequency, astigmatic axis angle, etc.).

  In the ophthalmologic apparatus 10 of the present embodiment, in the apparatus main body 13, an optical axis O <b> 1 which will be described later as a main optical axis in the intraocular pressure measurement unit 20 is above a main optical axis O <b> 10 which will be described later in the eye characteristic measurement unit 40 ( It is provided on the positive side in the axial direction (see FIG. 5). For this reason, in the ophthalmologic apparatus 10, the intraocular pressure measurement unit 20 is basically provided above the eye characteristic measurement unit 40 in the apparatus main body unit 13. Here, what is basically said in the positional relationship between the intraocular pressure measurement unit 20 and the ocular characteristic measurement unit 40 is that the intraocular pressure measurement unit 20 and the ocular characteristic measurement unit 40 are separately configured. Rather, the intraocular pressure measurement unit 20 and the ocular characteristic measurement unit 40 include a part of the intraocular pressure measurement unit 20 and the ocular characteristic measurement unit 40 by crossing a part of one optical system with the other optical system. This is because they are assembled into an integrated structure.

  Next, the optical configuration of the intraocular pressure measurement unit 20 will be described with reference to FIGS. 2 and 3. The intraocular pressure measuring unit 20 is a non-contact type tonometer. As shown in FIGS. 2 and 3, the intraocular pressure measurement unit 20 includes an anterior ocular segment observation optical system 21, an XY alignment index projection optical system 22, a fixation target projection optical system 23, an applanation detection optical system 24, and a Z alignment. An index projection optical system 25 and a Z alignment detection optical system 26 are provided.

  The anterior segment observation optical system 21 is provided for observing the anterior segment of the eye E and XY alignment (alignment in the direction along the XY plane). The anterior ocular segment observation optical system 21 is provided with an anterior ocular segment illumination light source 21a (see FIG. 2), an airflow spray nozzle 21b, an anterior ocular window glass 21c (see FIG. 3), and a chamber on the optical axis O1. A window glass 21d, a half mirror 21e, a half mirror 21g, an objective lens 21f, and a CCD camera 21i are provided. The anterior segment illumination light source 21a is positioned around the anterior segment window glass 21c (see FIG. 2), and a plurality (only two are shown in FIG. 2) are provided to directly illuminate the anterior segment. ing. The airflow blowing nozzle 21b is a nozzle for blowing an airflow onto the eye E (anterior eye portion), and is provided in an air compression chamber 34a (see FIG. 3) of the airflow blowing mechanism 34 described later. The CCD camera 21i generates an image signal based on an image (anterior eye image or the like) formed on the light receiving surface, and outputs the generated image signal to the control unit 33 (see FIG. 2). The image acquired from the CCD camera 21i is appropriately displayed on the display unit 14 (see FIG. 1) and appropriately output to an external device (not shown) under the control of the control unit 33.

  As shown in FIG. 3, the CCD camera 21i is movable along the optical axis O1 by a focusing drive mechanism 21D. The focusing drive mechanism 21D appropriately moves the CCD camera 21i to focus on the anterior eye part (cornea Ec) of the eye E under the control of the control unit 33 (see FIG. 2). In the focusing drive mechanism 21D, the drive source is shared with a fixation target moving mechanism 41D (see FIG. 4) of the fixation target projection optical system 41 described later. That is, the drive source drives the focusing drive mechanism 21D in an intraocular pressure measurement mode (see FIG. 5A) described later, and a fixation target in an eye characteristic measurement mode (see FIG. 5B) described later. The moving mechanism 41D is driven. The control unit 33 changes the position of the CCD camera 21i on the optical axis O1 in accordance with the position of the intraocular pressure measurement unit 20, that is, the apparatus main body unit 13, via the focusing drive mechanism 21D, thereby changing the eye E to be examined. Focus on the anterior segment of the eye (cornea Ec).

  In the present embodiment, the control unit 33 can displace the CCD camera 21i via the focusing drive mechanism 21D at two positions, the first focal position f1 and the second focal position f2 on the optical axis O1. It is possible. The movement of the CCD camera 21i on the optical axis O1 via the focusing drive mechanism 21D may be switched in two steps between the first focal position f1 and the second focal position f2. It may be moved continuously between f1 and the second focal position f2.

  The first focal position f1 is a position at which the intraocular pressure measurement unit 20 (device main body unit 13) can measure the intraocular pressure of the eye E, that is, the anterior eye part (cornea Ec) of the eye E. To the second set working distance d2 (see FIG. 5A), it is set to a position where the vicinity of the anterior eye portion (cornea Ec) of the eye E is in focus. In this embodiment, the position where the measurement of the intraocular pressure of the eye E can be performed is the distance (interval) from the tip of the airflow spray nozzle 21b (nozzle protrusion 21h described later) to the eye E, that is, The second set working distance d2 is set to a position at 11 mm (see FIG. 5A).

  The second focal position f2 corresponds to the anterior eye portion (cornea Ec) of the eye E when the intraocular pressure measurement unit 20 (apparatus body 13) is positioned sufficiently away from the eye E (subject). The focus is set in the vicinity. As will be described later, when switching from the eye characteristic measurement mode (measurement mode by the eye characteristic measurement unit 40) to the intraocular pressure measurement mode (measurement mode by the tonometry unit 20), the tonometry unit 20 (device The main body 13) is first moved in the Y-axis direction to a height position corresponding to the eye E, and then moved in the Z-axis direction to approach the eye E. Such movement is performed in order to prevent an airflow blowing nozzle 21b (nozzle projection 21h described later) (the tip thereof) (the tip thereof) that is extremely close to the eye E from being in contact with the eye E by mistake. Alternatively, in the intraocular pressure measurement mode, when the subject eye E to be measured is switched between the left and right eyes of the subject, the intraocular pressure measurement unit 20 (device main body unit 13) is first retracted from the position where one of the intraocular pressures is measured. (Z-axis direction negative side), moving in the left-right direction (X-axis direction), and performing the alignment while moving in the direction approaching the other eye E to be examined. Such an operation is performed in order to prevent the tip of the airflow spray nozzle 21b (nozzle projection 21h described later) of the tonometry part 20 from erroneously contacting the subject (its nose, etc.).

  In this embodiment, the control unit 33 is positioned in the Z-axis direction (front-rear direction) of the apparatus main body 13 (intraocular pressure measurement unit 20) with respect to the base 11, that is, the drive unit 12 (its Z-axis drive portion 12b). The position of the CCD camera 21i is switched between the first focal position f1 and the second focal position f2 according to the control position. This is because the interval between the intraocular pressure measurement unit 20 and the eye E to be examined is roughly determined by the position of the apparatus main body 13 (intraocular pressure measurement unit 20) with respect to the base 11. In the focusing drive mechanism 21D, the drive source is shared with the fixation target moving mechanism 41D (see FIG. 4) of the fixation target projection optical system 41 described later. The index moving mechanism 43D (see FIG. 4) of the index projection optical system 43 (light receiving optical system 44) may be used in common with a drive source, or may have an individual drive source, and is limited to this embodiment. It is not a thing.

  In this anterior ocular segment observation optical system 21, an anterior ocular segment image of the subject eye E is illuminated by a CCD camera 21i while illuminating the subject eye E (the anterior segment) with an anterior segment illumination light source 21a (see FIG. 2). get. The anterior eye part image (the light beam) passes through the airflow blowing nozzle 21b and passes through the anterior eye part window glass 21c (including a glass plate 34b described later), the chamber window glass 21d, the half mirror 21g, and the half mirror 21e. Then, it is focused by the objective lens 21f and formed on the CCD camera 21i (its light receiving surface). The CCD camera 21i (anterior ocular segment observation optical system 21) outputs a signal based on reception of the formed anterior ocular segment image to the control unit 33 (see FIG. 2). The control unit 33 causes the display unit 14 (see FIG. 1) to appropriately display the anterior segment image acquired by the CCD camera 21i (anterior segment observation optical system 21).

  Further, in the anterior ocular segment observation optical system 21, as described later, the reflected light from the cornea Ec of the XY alignment index light projected onto the eye E by the XY alignment index projection optical system 22 is converted into a CCD camera 21i (its light receiving surface). To proceed. Specifically, in the anterior ocular segment observation optical system 21, the reflected light flux passes through the inside of the airflow blowing nozzle 21b, passes through the chamber window glass 21d, the half mirror 21g, and the half mirror 21e, and reaches the objective lens 21f. . Then, in the anterior ocular segment observation optical system 21, the reflected light beam is converged by the objective lens 21f and advanced to the CCD camera 21i. Then, on the CCD camera 21i (its light receiving surface), a bright spot image is formed at a position corresponding to the positional relationship in the XY direction between the apparatus main body 13 (intraocular pressure measurement unit 20) and the cornea Ec. The CCD camera 21i (anterior ocular segment observation optical system 21) can output a signal based on reception of the formed bright spot image to the control unit 33 (see FIG. 2). The bright spot image of the XY alignment index light is formed on the cornea Ec of the eye E to be examined. For this reason, the control part 33 can acquire the image (the data) of the anterior eye part (cornea Ec) in which the bright spot image was formed, and the anterior eye part (in which the bright spot image was formed on the display part 14) An image of the cornea Ec) can be displayed as appropriate. The display unit 14 also displays an alignment auxiliary mark generated by image generation means (not shown) in an overlapping manner.

  The XY alignment index projection optical system 22 projects the index light onto the cornea Ec of the eye E from the front. The index light is a position adjustment with respect to the intraocular pressure measurement unit 20 of the eye E (the anterior eye portion (cornea Ec)) viewed in a direction along the XY plane (hereinafter also referred to as XY direction), so-called XY. It has a function that enables alignment in the direction. The index light also has a function that enables detection of the deformation amount (degree of deformation (applanation)) of the cornea Ec of the eye E. The XY alignment index projection optical system 22 includes an XY alignment light source 22a, a condenser lens 22b, an aperture stop 22c, a pinhole plate 22d, a dichroic mirror 22e, and a projection lens 22f. The half mirror 21e is shared. The XY alignment light source 22a is a light source that emits infrared light. The projection lens 22f is disposed on the optical path of the XY alignment index projection optical system 22 so that the focal point coincides with the pinhole plate 22d. In the XY alignment index projection optical system 22, infrared light emitted from the XY alignment light source 22a passes through the aperture stop 22c while being focused by the condenser lens 22b, and reaches the pinhole plate 22d (its hole). And proceed. In the XY alignment index projection optical system 22, the light beam that has passed through the pinhole plate 22d (its hole) is reflected by the dichroic mirror 22e and travels to the projection lens 22f, and the progressed infrared light is projected by the projection lens 22f. It advances to the half mirror 21e as a parallel light beam. Then, in the XY alignment index projection optical system 22, the parallel light beam is advanced on the optical axis O <b> 1 of the anterior ocular segment observation optical system 21 by being reflected by the half mirror 21 e. The parallel luminous flux passes through the half mirror 21g and the chamber window glass 21d, proceeds to the inside of the airflow spray nozzle 21b, and passes through the airflow spray nozzle 21b to the eye E as XY alignment index light. It reaches. Although not shown, the XY alignment index light is reflected on the surface of the cornea Ec so as to form a bright spot image at an intermediate position between the cornea vertex Ea of the cornea Ec and the center of curvature of the cornea Ec. The aperture stop 22c is provided at a position conjugate with the corneal vertex Ea of the cornea Ec with respect to the projection lens 22f.

  The fixation target projection optical system 23 projects (presents) the fixation target onto the eye E to be examined. The fixation target projection optical system 23 includes a fixation target light source 23a and a pinhole plate 23b. The fixation target projection optical system 23 shares the XY alignment index projection optical system 22, the dichroic mirror 22e, and the projection lens 22f, and anterior ocular segment observation optics. The system 21 and the half mirror 21e are shared. The fixation target light source 23a is a light source that emits visible light. In the fixation target projection optical system 23, the fixation target light emitted from the fixation target light source 23a is advanced to the pinhole plate 23b (the hole) and passes through the pinhole plate 23b (the hole). Then, the light passes through the dichroic mirror 22e and advances to the projection lens 22f. The fixation target light (the light beam) is made substantially parallel light by the projection lens 22f, travels to the half mirror 21e, and is reflected by the half mirror 21e, whereby the optical axis O1 of the anterior ocular segment observation optical system 21 is obtained. Go on top. The luminous flux passes through the half mirror 21g and the chamber window glass 21d, travels into the airflow spray nozzle 21b, passes through the airflow spray nozzle 21b, and reaches the eye E to be examined. The fixation target projection optical system 23 fixes the line of sight of the subject by causing the subject to gaze at the fixation target projected onto the eye E as a fixation target.

  As shown in FIG. 3, the applanation detection optical system 24 receives light reflected by the cornea Ec of the XY alignment index light projected onto the eye E by the XY alignment index projection optical system 22, and the surface of the cornea Ec. The amount of deformation (applanation) is detected. The applanation detection optical system 24 includes a lens 24a, a pinhole plate 24b, a sensor 24c, and a half mirror 21g provided on the optical path of the anterior ocular segment observation optical system 21. When the surface of the cornea Ec is flattened, the lens 24a collects the light reflected by the cornea Ec of the XY alignment index light in the central hole of the pinhole plate 24b. The pinhole plate 24b is provided with the central hole positioned at the above-described condensing position by the lens 24a. The sensor 24c is a light receiving sensor capable of detecting the amount of light, and outputs a signal corresponding to the amount of received light. In the present embodiment, a photodiode is used. The sensor 24c (applanation detection optical system 24) outputs a signal corresponding to the received light amount to the control unit 33.

  As described above, the reflected light beam of the XY alignment index light reflected by the surface (corneal surface) of the cornea Ec of the eye E passes through the air blowing nozzle 21b, passes through the chamber window glass 21d, and passes through the half mirror 21g. To. In the applanation detection optical system 24, a part thereof is reflected by the half mirror 21g, travels to the lens 24a, converges by the lens 24a, and travels to the pinhole plate 24b. Here, in the eye E, the surface of the cornea Ec is deformed and gradually flattened by the airflow spraying mechanism 34 (see FIG. 1 and the like), which will be described later, blowing airflow from the airflow spraying nozzle 21b toward the cornea Ec. It becomes a state. At that time, in the applanation detection optical system 24, when the surface of the cornea Ec is flattened according to the setting described above, the entire reflected light beam that has traveled reaches the sensor 24c through the hole of the pinhole plate 24b, and other states Then, the sensor reaches the sensor 24c while being partially blocked by the pinhole plate 24b. For this reason, the applanation detection optical system 24 can detect that the surface of the cornea Ec has been flattened (applanation) by detecting the time when the amount of light received by the sensor 24c becomes maximum. As a result, the applanation detection optical system 24 can detect the shape (applanation) of the surface of the cornea Ec that has been deformed by spraying fluid, and the sensor 24c can detect the reflected light (reflected light) from the cornea Ec for the detection. It functions as a light receiving portion that receives a light beam.

  As shown in FIG. 2, the Z alignment index projection optical system 25 projects the alignment index light (alignment index parallel light beam) in the Z-axis direction obliquely onto the cornea Ec of the eye E to be examined. The Z alignment index projection optical system 25 includes a Z alignment light source 25a, a condenser lens 25b, an aperture stop 25c, a pinhole plate 25d, and a projection lens 25e on the optical axis O2. The light source 25a for Z alignment is a light source that emits infrared light (for example, wavelength 860 nm). The aperture stop 25c is provided at a position conjugate with the corneal vertex Ea of the cornea Ec with respect to the projection lens 25e. The projection lens 25e is disposed with its focal point coincident with the pinhole plate 25d (the hole). In the Z alignment index projection optical system 25, infrared light (its light beam) emitted from the Z alignment light source 25a is condensed by the condenser lens 25b, passes through the aperture stop 25c, and proceeds to the pinhole plate 25d. To do. In this Z alignment index projection optical system 25, the light beam that has passed through the pinhole plate 25d (the hole) is advanced to the projection lens 25e, and is advanced to the cornea Ec as parallel light by the projection lens 25e. The infrared light (the light beam (Z alignment index light)) is reflected on the surface of the cornea Ec so as to form a bright spot image located inside the eye E.

  The Z alignment detection optical system 26 receives the reflected light from the cornea Ec of the Z alignment index light from a direction symmetric with respect to the optical axis O1 of the anterior ocular segment observation optical system 21, and receives the apparatus main body 13 (intraocular pressure measurement). Part 20) and the cornea Ec in the Z-axis direction are detected. The Z alignment detection optical system 26 includes an imaging lens 26a, a cylindrical lens 26b, and a sensor 26c on the optical axis O3. The cylindrical lens 26b has power in the Y-axis direction. The sensor 26c is a light receiving sensor that can detect the light receiving position on the light receiving surface, and can be configured using a line sensor or PSD. In this embodiment, a line sensor is used. The sensor 26 c is connected to the Z alignment detection correction unit 32.

  In the Z alignment detection optical system 26, the reflected light beam projected from the alignment index light by the Z alignment index projection optical system 25 and reflected from the surface of the cornea Ec proceeds to the imaging lens 26a. In the Z alignment detection optical system 26, the reflected light beam is converged by the imaging lens 26a, travels to the cylindrical lens 26b, and is condensed in the Y-axis direction by the cylindrical lens 26b to form a bright spot image on the sensor 26c. . The sensor 26c is in a conjugate positional relationship with respect to the above-described bright spot image formed on the inside of the eye E by the Z alignment index projection optical system 25 and the imaging lens 26a in the XZ plane, and is Y- In the Z plane, the corneal apex Ea is in a conjugate positional relationship with the imaging lens 26a and the cylindrical lens 26b. That is, the sensor 26c has a conjugate relationship with the aperture stop 25c (the magnification at this time is set so that the image of the aperture stop 25c is smaller than the size of the sensor 26c), and the cornea Ec has shifted in the Y-axis direction. However, the reflected light beam on the surface of the cornea Ec efficiently enters the sensor 26c. This sensor 26 c (Z alignment detection optical system 26) outputs a signal based on reception of the formed bright spot image to the Z alignment detection correction unit 32.

  As shown in FIG. 3, the airflow blowing mechanism 34 has an air compression chamber 34a, and is provided with an air compression drive unit 34d (see FIG. 1). The air compression drive unit 34d has a piston that can move inward of the air compression chamber 34a and a drive unit that moves the piston. In the present embodiment, the device main body unit 13 includes an intraocular pressure measurement unit. 20 (its optical system) is provided above. The air compression drive unit 34d is driven under the control of the control unit 33 (see FIG. 2) to compress the air in the air compression chamber 34a. An air blowing nozzle 21b is attached to the air compression chamber 34a via a transparent glass plate 34b, and a chamber window glass 21d is provided to face the nozzle. For this reason, the air compression chamber 34a is prevented from interfering with the above-described function in the anterior ocular segment observation optical system 21. The airflow blowing nozzle 21b and the anterior ocular window glass 21c are accommodated in a nozzle projection 21h (see FIGS. 1 and 6).

  The air compression chamber 34a is provided with a pressure sensor 34c that detects the pressure of the air compression chamber 34a. Although not shown, the pressure sensor 34c is connected to the control unit 33 (see FIG. 2), and outputs a signal corresponding to the detected pressure to the control unit 33. In the airflow blowing mechanism 34, the air compression driving unit 34 d compresses the air in the air compression chamber 34 a under the control of the control unit 33, so that the airflow is directed from the airflow blowing nozzle 21 b toward the cornea Ec of the eye E to be examined. Can be sprayed. Further, in the airflow blowing mechanism 34, the pressure when the airflow is blown from the airflow blowing nozzle 21b can be acquired by detecting the pressure in the air compression chamber 34a with the pressure sensor 34c. In the airflow blowing mechanism 34, instead of providing the pressure sensor 34c, a change in pressure with respect to time may be set as a predetermined characteristic in the airflow to be blown.

  The intraocular pressure measurement unit 20 includes a driver (drive mechanism) for performing lighting control of the anterior segment illumination light source 21a, the XY alignment light source 22a, the fixation target light source 23a, and the Z alignment light source 25a. A controller 33 (see FIG. 2) is connected to the driver. Therefore, the intraocular pressure measurement unit 20 appropriately turns on the anterior segment illumination light source 21a, the XY alignment light source 22a, the fixation target light source 23a, and the Z alignment light source 25a under the control of the control unit 33. In the intraocular pressure measurement unit 20, as described above, the CCD camera 21i is appropriately moved on the optical axis O1 via the focusing drive mechanism 21D under the control of the control unit 33, and output from the CCD camera 21i. An image generation process based on the image signal is performed, and the generated image is appropriately displayed on the display unit 14.

  Next, a schematic operation when measuring the intraocular pressure of the eye E using the above-described intraocular pressure measurement unit 20 will be described. In addition, the following operation | movement in the intraocular pressure measurement part 20 is performed under control of the control part 33 (refer FIG. 2). First, the power switch of the ophthalmic apparatus 10 is turned on, and an operation for performing measurement using the intraocular pressure measurement unit 20 is performed on the display unit 14. Then, the intraocular pressure measurement unit 20 sets the intraocular pressure measurement mode (see FIG. 5A) as will be described later, and then the anterior ocular segment illumination light source 21a, XY alignment light source 22a, fixation target light source 23a, and Z. The alignment light source 25a is appropriately turned on. At this time, the intraocular pressure measurement unit 20 may repeatedly blink each of the light sources 21a, 23a, and 25a at different periods, and may identify which light source is the light.

  As shown in FIG. 3, the intraocular pressure measurement unit 20 lights the fixation target light source 23 a of the fixation target projection optical system 23, thereby projecting the fixation target onto the eye E to be examined. The subject's line of sight is fixed. Further, the intraocular pressure measurement unit 20 lights the XY alignment light source 22a of the XY alignment index projection optical system 22 to project a parallel light beam onto the cornea Ec. In the intraocular pressure measurement unit 20, the reflected light beam reflected by the cornea Ec is received by the CCD camera 21 i of the anterior ocular segment observation optical system 21 and the sensor 24 c of the applanation detection optical system 24. Further, as shown in FIG. 2, the intraocular pressure measuring unit 20 lights the Z alignment light source 25a of the Z alignment index projection optical system 25 to project a parallel light beam for alignment in the Z-axis direction onto the cornea Ec. . In the intraocular pressure measurement unit 20, the reflected light beam reflected by the cornea Ec is received by the sensor 26 c of the Z alignment detection optical system 26.

  In the intraocular pressure measurement unit 20, the anterior segment illumination light source 21a of the anterior segment observation optical system 21 is turned on to illuminate the anterior segment of the subject eye E, and the anterior segment image of the subject eye E is displayed as a CCD camera. An image is formed on 21i. The intraocular pressure measurement unit 20 displays the anterior eye image of the eye E on which the luminescent spot image of the XY alignment index light is formed and the alignment auxiliary mark on the display unit 14 although they are not clearly shown. Let The examiner operates the operation unit displayed on the display unit 14 while looking at the display unit 14, thereby moving the apparatus main body unit 13 up and down and left and right so that the bright spot image appears in the screen of the display unit 14. Align so that. Further, in the intraocular pressure measurement unit 20, the Z alignment detection / correction unit 32 is based on the light reception signal of the sensor 26 c of the Z alignment detection optical system 26 and the calculation result of the XY alignment detection unit 31, and the apparatus main body unit 13 and the cornea Ec. Is calculated in the Z-axis direction. In the intraocular pressure measurement unit 20, the drive unit 12 is controlled based on the position in the XY direction obtained from the anterior segment observation optical system 21 and the calculation result output from the Z alignment detection correction unit 32 under the control of the control unit 33. That is, by appropriately driving the Y-axis drive portion 12a, the Z-axis drive portion 12b, and the X-axis drive portion 12c, the apparatus body 13 is moved in the vertical direction (Y-axis direction) and the front-rear direction (Z-axis direction) with respect to the base 11. ) And the right and left direction (X-axis direction) as appropriate, and auto alignment (automatic alignment adjustment) is performed.

  In the intraocular pressure measurement unit 20, when the auto alignment is completed, the control unit 33 activates the airflow blowing mechanism 34 to blow an airflow from the airflow blowing nozzle 21b toward the cornea Ec of the eye E to be examined. Then, in the eye E, the surface of the cornea Ec is deformed and gradually becomes flat (applanation). In the process in which the cornea Ec is gradually flattened (applanation), the amount of light received by the sensor 24c of the applanation detection optical system 24 becomes maximum when the surface of the cornea Ec is flattened (applanation). . For this reason, in the intraocular pressure measurement unit 20, the control unit 33 determines that the surface of the cornea Ec is flat (applanation) based on the change in the amount of light received by the sensor 24c. That is, the applanation detection optical system 24 (sensor 24c) can detect the applanation of the cornea Ec. In the intraocular pressure measurement unit 20, the control unit 33 obtains the intraocular pressure of the eye E (calculates the intraocular pressure value) based on the output from the pressure sensor 34c (the pressure of the blown airflow) and calculates the intraocular pressure. The result is displayed on the display unit 14. In addition, in the control part 33, based on the time from the time of detecting that the surface of the cornea Ec was made flat (applanation) from the time of starting the blowing of the airflow by the airflow blowing nozzle 21b (airflow blowing mechanism 34), What calculates | requires the intraocular pressure of the to-be-tested eye E (it calculates an intraocular pressure value) may be sufficient.

  Next, the optical configuration of the eye characteristic measurement unit 40 will be described with reference to FIG. The eye characteristic measurement unit 40 measures the shape of the cornea Ec of the eye E and the eye refractive power (spherical power, astigmatism power, astigmatic axis angle, etc.) of the eye E. As shown in FIG. 4, the eye characteristic measuring unit 40 includes a fixation target projection optical system 41, an observation optical system 42, an eye refractive power measurement ring-shaped index projection optical system 43, a light receiving optical system 44, and an alignment light projection system 45. With. The fixation target projection optical system 41 projects the target on the fundus oculi Ef (see FIGS. 2 and 3) of the eye E to fixate and cloud the eye E to be examined. The observation optical system 42 observes the anterior eye part (cornea Ec) of the eye E to be examined. The ring-shaped index projection optical system 43 for measuring eye refractive power projects a pattern light beam as a ring-shaped index for measuring eye refractive power onto the fundus oculi Ef of the eye E to measure the eye refractive power of the eye E. To do. The light receiving optical system 44 causes the imaging element 44d described later to receive the eye refractive power measurement ring-shaped index image reflected from the fundus oculi Ef of the eye E. The eye refractive power measurement ring-shaped index projection optical system 43 and the light receiving optical system 44 together with the observation optical system 42 and a corneal shape measurement ring-shaped index projection light source 46A, 46B, 46C described later, measure the corneal shape and eye refractive power. Configure the optical system. The alignment light projection system 45 projects the index light toward the eye E to detect the alignment state in the XY direction. The optical system of the eye characteristic measuring unit 40 is provided with a working distance detection optical system for detecting a working distance between the eye E to be examined and the apparatus main body 13 although not shown.

  The fixation target projection optical system 41 includes a fixation target light source 41a, a collimator lens 41b, an index plate 41c, a relay lens 41d, a mirror 41e, a dichroic mirror 41f, a dichroic mirror 41g, and an objective lens 41h on the optical axis O11. . The index plate 41c is provided with a target for fixing the eye E to be inspected and fogged. The fixation target light source 41a, the collimator lens 41b, and the index plate 41c constitute a fixation target unit 41U, and the fixation target projection optical system 41 is fixed by the fixation target moving mechanism 41D so as to fixate and cloud the eye E to be examined. It is possible to move integrally along the optical axis O11. Note that the positions where the dichroic mirror 41g and the objective lens 41h are provided are on the main optical axis O10 in the eye characteristic measurement unit 40 described later.

  In this fixation target projection optical system 41, visible light is emitted from a fixation target light source 41a, and the visible light is converted into a parallel light beam by a collimator lens 41b, and then transmitted through an index plate 41c to be a target light beam. In the fixation target projecting optical system 41, the target light beam is reflected by the mirror 41e after passing through the relay lens 41d, passes through the dichroic mirror 41f, and advances to the dichroic mirror 41g. In the fixation target projecting optical system 41, the target light flux is reflected by the dichroic mirror 41g onto the main optical axis O10 in the eye characteristic measuring unit 40, and is advanced to the eye E through the objective lens 41h. The fixation target projection optical system 41 fixes the line of sight of the subject by causing the subject to focus on the target luminous flux (fixation target) projected onto the eye E as a fixation target. Further, the fixation target projection optical system 41 moves the fixation target unit 41U from a state in which the subject gazes as a fixation target to a position where the focus is not achieved, so that the eye E is in a cloudy state. .

  The observation optical system 42 includes an illumination light source (not shown), and includes a half mirror 42a, a relay lens 42b, an imaging lens 42c, and an image sensor 42d on the main optical axis O10. The objective lens 41h and the dichroic mirror 41g are shared. The image sensor 42d is a two-dimensional solid-state image sensor, and a CMOS image sensor is used in this embodiment.

  In this observation optical system 42, the anterior eye portion (cornea Ec) of the eye E is illuminated with the illumination light beam emitted from the illumination light source, and the illumination light beam reflected by the anterior eye portion is acquired by the objective lens 41h. In the observation optical system 42, the reflected illumination light beam is imaged on the imaging element 42d (its light receiving surface) by the imaging lens 42c through the objective lens 41h, through the dichroic mirror 41g and the half mirror 42a, through the relay lens 42b. Let The imaging element 42d outputs an image signal based on the acquired image to the control unit 33 (see FIG. 2). The control unit 33 causes the display unit 14 to display an image of the anterior segment (cornea Ec) based on the input image signal. Therefore, in the observation optical system 42, an image of the anterior segment (cornea Ec) can be formed on the image sensor 42d (its light receiving surface), and the image of the anterior segment can be displayed on the display unit 14. it can. Note that the illumination light source of the observation optical system 42 is turned off when the refractive power is measured after the alignment is completed.

  The eye refractive power measurement ring index projection optical system 43 includes an eye refractive power measurement light source 43a, a lens 43b, a conical prism 43c, a ring index plate 43d, a lens 43e, a bandpass filter 43f, a pupil ring 43g, and a perforated prism 43h. And the fixed prism projection optical system 41, the dichroic mirror 41f, the dichroic mirror 41g, and the objective lens 41h. The eye refractive power measurement light source 43a and the pupil ring 43g are arranged at an optically conjugate position, and the ring index plate 43d and the fundus oculi Ef of the eye E are arranged at an optically conjugate position. The eye refractive power measurement light source 43a, the lens 43b, the conical prism 43c, and the ring index plate 43d constitute an index unit 43U. The index unit 43U projects an eye refractive power measurement ring index by the index moving mechanism 43D. The optical system 43 can be moved integrally along the optical axis O13.

  In the eye refractive power measurement ring index projection optical system 43, the light beam emitted from the eye refractive power measurement light source 43a is converted into a parallel light beam by the lens 43b and travels to the ring index plate 43d through the conical prism 43c. The luminous flux passes through the ring-shaped pattern portion formed on the ring index plate 43d and becomes a pattern luminous flux as a ring-shaped index for eye refractive power measurement. In this ring-shaped index projection optical system 43 for measuring eye refractive power, the pattern light flux is advanced to the perforated prism 43h through the lens 43e, the band pass filter 43f and the pupil ring 43g, and is reflected by the reflecting surface of the perforated prism 43h. The light is reflected and travels through the rotary prism 43i to the dichroic mirror 41f. Then, in the ring-shaped index projection optical system 43 for measuring the eye refractive power, the pattern light beam is reflected by the dichroic mirror 41g after being reflected by the dichroic mirror 41f, so as to travel on the main optical axis O10 in the eye characteristic measuring unit 40. Then, in the ring-shaped index projection optical system 43 for measuring eye refractive power, the pattern light beam is imaged on the fundus oculi Ef (see FIGS. 2 and 3) of the eye E by the objective lens 41h.

  The eye refractive power measurement ring index projection optical system 43 is provided with corneal shape measurement ring index projection light sources 46A, 46B, and 46C on the front side of the objective lens 41h. The corneal shape measurement ring-shaped index projection light sources 46A, 46B, and 46C are concentrically provided with respect to the main optical axis O10 at a predetermined distance from the eye E (cornea Ec) on the ring pattern 47. A ring-shaped index light for corneal shape measurement is projected onto the optometry E (cornea Ec). The corneal shape measurement ring-shaped index light is projected onto the cornea Ec of the eye E, thereby forming a corneal shape measurement ring-shaped index light on the cornea Ec. The ring-shaped index for measuring the corneal shape (the light beam) is reflected on the cornea Ec of the eye E to be imaged on the image sensor 42d by the observation optical system 42 described above. Therefore, in the observation optical system 42, the display unit 14 can display an image (image) of a ring-shaped index for corneal shape measurement so as to overlap the image of the anterior segment (cornea Ec).

  The light receiving optical system 44 includes a hole 44a of the perforated prism 43h, a mirror 44b, a lens 44c, and an imaging device 44d, and shares the fixation target projection optical system 41, the objective lens 41h, the dichroic mirror 41g, and the dichroic mirror 41f. In addition, the ring-shaped index projection optical system 43 for measuring eye refractive power and the rotary prism 43i are shared. The image pickup device 44d is a two-dimensional solid-state image pickup device, and a CCD (charge coupled device) image sensor is used in this embodiment. This image sensor 44d is linked to the index unit 43U of the eye refractive power measurement ring-shaped index projection optical system 43 by the index moving mechanism 43D of the eye refractive power measurement ring-shaped index projection optical system 43, and receives the light receiving optical system. It is possible to move along 44 optical axes O14.

  In the light receiving optical system 44, a pattern reflected light beam guided to the fundus oculi Ef (see FIGS. 2 and 3) by the eye refractive power measurement ring-shaped index projection optical system 43 and reflected by the fundus oculi Ef is reflected by the objective lens 41h. The light is condensed, reflected by the dichroic mirror 41g, then reflected by the dichroic mirror 41f, and advanced to the rotary prism 43i. In the light receiving optical system 44, the reflected pattern reflected light beam travels through the rotary prism 43i to the hole 44a of the holed prism 43h and passes through the hole 44a. In the light receiving optical system 44, the pattern reflected light beam that has passed through the hole 44a is reflected by the mirror 44b, and a pattern reflected light beam, that is, a ring-shaped index for eye refractive power measurement is formed on the image pickup device 44d (its light receiving surface) by the lens 44c. Let me image. The imaging element 44d outputs an image signal based on the acquired image to the control unit 33 (see FIG. 2). The control unit 33 causes the display unit 14 (see FIG. 1) to display an image of an eye refractive power measurement ring index based on the input image signal. For this reason, in the light receiving optical system 44, an image of a ring-shaped index for measuring eye refractive power can be formed on the image sensor 44d (its light-receiving surface), and the ring-shaped index for measuring eye refractive power is displayed on the display unit 14. An image can be displayed.

  The alignment light projection system 45 includes an LED 45a, a pinhole 45b, and a lens 45c, shares the observation optical system 42 and the half mirror 42a, and shares the fixation target projection optical system 41, the dichroic mirror 41g, and the objective lens 41h. . In this alignment light projection system 45, the light beam from the LED 45a is converted into an alignment index light beam through the pinhole 45b (the hole) and reflected by the half mirror 42a through the lens 45c, so that the main optical axis in the eye characteristic measurement unit 40 is obtained. Advance over O10. In the alignment light projection system 45, the alignment index light beam is advanced to the objective lens 41h through the dichroic mirror 41g, and is projected as an alignment index light beam toward the cornea Ec of the eye E through the objective lens 41h. The alignment light projection system 45 has a function of automatically aligning the apparatus main body 13 with respect to the eye E by projecting an alignment index light beam toward the cornea Ec of the eye E. The alignment index light beam projected as parallel light toward the eye E is reflected by the cornea Ec of the eye E, and a bright spot image as an alignment index image is projected on the image sensor 42d by the observation optical system 42. The When this bright spot image is positioned within an alignment mark formed by an optical system (not shown), the alignment is completed.

  The eye characteristic measurement unit 40 controls lighting of the fixation target light source 41a, the illumination light source of the observation optical system 42, the eye refractive power measurement light source 43a, the LED 45a, and the corneal shape measurement ring-shaped index projection light sources 46A, 46B, and 46C. And a control unit 33 (see FIG. 2) is connected to the driver. Therefore, the eye characteristic measurement unit 40, under the control of the control unit 33, projects the fixation target light source 41a, the illumination light source of the observation optical system 42, the eye refractive power measurement light source 43a, the LED 45a, and the corneal shape measurement ring-shaped index projection. The light sources 46A, 46B, and 46C are appropriately turned on. Further, as described above, the eye characteristic measurement unit 40 moves the fixation target unit 41U integrally along the optical axis O11 via the fixation target moving mechanism 41D under the control of the control unit 33, and moves the index. The index unit 43U is moved integrally along the optical axis O13 via the mechanism 43D, and the imaging element 44d is moved along the optical axis O14. Further, as described above, the eye characteristic measurement unit 40 performs an image generation process based on the image signals output from the image sensor 42d and the image sensor 44d under the control of the control unit 33, and the generated image is displayed. Displayed appropriately on the display unit 14.

  Next, a schematic view of measuring the shape of the cornea Ec of the eye E and the eye refractive power (spherical power, astigmatism power, astigmatic axis angle, etc.) of the eye E using the eye characteristic measuring unit 40 described above. The operation will be described. In addition, the following operation | movement in the eye characteristic measurement part 40 is performed under control of the control part 33 (refer FIG. 2). First, the power switch of the ophthalmologic apparatus 10 is turned on, and an operation for performing measurement using the eye characteristic measurement unit 40 is performed on the display unit 14. Then, in the eye characteristic measurement unit 40, as described later, after the eye characteristic measurement mode (see FIG. 5B) is set, the illumination light source is turned on in the observation optical system 42, and the anterior eye part ( An image of the cornea Ec) is displayed. Then, the examiner operates the operation unit displayed on the display unit 14 so that the pupil of the eye E is positioned within the screen of the display unit 14, thereby moving the apparatus main body unit 13 up, down, left, and right. Schematic alignment of the apparatus main body 13 with respect to the eye E is performed. Further, the eye characteristic measurement unit 40 (control unit 33) can detect the pupil from the image of the anterior segment based on the image signal output from the image sensor 42d. This detection of the pupil can be performed, for example, by storing in advance the shape to be recognized as the pupil in the anterior eye image and detecting the shape to be recognized based on the contrast in the image. Therefore, in the eye characteristic measurement unit 40, for example, when the subject eye E to be measured is switched between left and right, the pupil is formed based on the image while moving the apparatus main body 13 in the left-right direction according to the switching. The above-described general alignment can be automatically performed by detecting and moving the apparatus main body 13 (eye characteristic measurement unit 40) with the detected pupil as a target position.

  Then, in the eye characteristic measurement unit 40, the observation optical system 42 causes the display unit 14 to display a bright spot image as an alignment index image. Thereafter, the eye characteristic measurement unit 40 starts alignment detection based on the alignment light projection system 45 and the working distance detection optical system (not shown). That is, in the eye characteristic measuring unit 40, the apparatus main body 13 is moved in the vertical direction (Y-axis direction) and the front-rear direction (Z-axis) with respect to the base 11 so that the bright spot image as the alignment index image is positioned in the alignment mark. Direction) and left and right direction (X-axis direction) as appropriate, and auto alignment (automatic alignment adjustment) is performed. Thereby, in the eye characteristic measurement part 40, the automatic alignment with respect to the vertex of the cornea Ec of the eye E of the apparatus main body part 13 is completed.

  Then, the eye characteristic measuring unit 40 turns on the corneal shape measurement ring-shaped index projection light sources 46A, 46B, and 46C of the eye-refractive-index ring-shaped index projection optical system 43, and uses the corneal shape measurement ring-shaped index as the cornea. Project to Ec. Then, the control unit 33 measures the shape of the cornea Ec from the image of the corneal shape measurement ring-shaped index projected onto the cornea Ec based on the image displayed on the display unit 14 (image signal from the imaging element 42d). To do. Since the details of the measurement of the shape of the cornea Ec are known, the description thereof is omitted. The control unit 33 can measure the spherical power, the cylindrical power, and the shaft angle as the eye refractive power by a known method. The configuration of the eye refractive power measurement unit is the same as that disclosed in JP-A-2002-253506, but is not limited to this configuration. Thus, the control unit 33 performs measurement of the corneal shape and measurement of eye refractive power (optical characteristics). In addition, the control part 33 stores a calculation result etc. in a memory | storage part (illustration is abbreviate | omitted) suitably.

  In the ophthalmologic apparatus 10, in the present embodiment, in the apparatus main body 13, the tonometry part 20 is basically provided above the eye characteristic measurement part 40, and the tonometry part 20 and the eye characteristic measurement part 40 are provided. It is attached to the mounting base and fixed to each other. In other words, in the ophthalmologic apparatus 10, in the apparatus main body 13, the intraocular pressure measurement unit 20 and the eye characteristic measurement unit 40 are integrated to eliminate the need to change the positional relationship. For this reason, the mounting base, that is, the intraocular pressure measurement unit 20 and the eye characteristic measurement unit 40 (device main body unit 13) attached thereto, are connected to the drive unit 12, that is, the Y-axis drive part 12a, the Z-axis drive part 12b, and the X-axis drive part 12c. Accordingly, the base 11 is appropriately moved in the vertical direction (Y-axis direction), the front-rear direction (Z-axis direction), and the left-right direction (X-axis direction). In the ophthalmic apparatus 10, the apparatus main body 13 (mounting base) is moved with respect to the base 11 by the drive unit 12 (Y-axis drive part 12 a, Z-axis drive part 12 b and X-axis drive part 12 c). Each of the intraocular pressure measurement unit 20 and the eye characteristic measurement unit 40 can be moved to a position corresponding to the eye E (face of the subject) fixed by the chin rest 15 and the forehead support 16. (See FIG. 5).

  For this reason, in the ophthalmologic apparatus 10, the intraocular pressure measurement is performed by moving the apparatus main body 13 (mounting base) in the vertical direction (Y-axis direction) with respect to the base 11 by the Y-axis drive portion 12a of the drive unit 12. The eye E can be positioned on the extension line of the optical axis O1 of the anterior ocular segment observation optical system 21 of the unit 20, and the intraocular pressure measurement unit 20 can be made to correspond to the height position of the eye E (FIG. 5A). )reference). In the ophthalmologic apparatus 10, as shown in FIG. 5A, the anterior ocular segment of the intraocular pressure measuring unit 20 is moved in the front-rear direction (Z-axis direction) by the Z-axis drive portion 12 b of the drive unit 12. It is assumed that the tip of the airflow spray nozzle 21b (nozzle protrusion 21h) of the observation optical system 21 is located at the second set working distance d2 from the eye E (its cornea vertex Ea). The second set working distance d2 is 11 mm in this embodiment. This state is a measurement mode by the intraocular pressure measurement unit 20, that is, an intraocular pressure measurement mode.

  Further, in the ophthalmologic apparatus 10, the apparatus main body part 13 (mounting base) is moved in the vertical direction (Y-axis direction) by the Y-axis drive part 12 a of the drive part 12 with respect to the base 11, thereby the eye characteristic measurement part. The eye E can be positioned on the extended line of the main optical axis O10 of 40, and the eye characteristic measuring unit 40 can correspond to the height position of the eye E (see FIG. 5B). Then, in the ophthalmologic apparatus 10, as shown in FIG. 5B, the front end of the eye characteristic measurement unit 40 (main book) is moved by the Z-axis drive portion 12 b of the drive unit 12 in the front-rear direction (Z-axis direction). In the embodiment, the ring pattern 47) is located at the first set working distance d1 from the eye E to be examined. The front end of the eye characteristic measuring unit 40 refers to a structure that is closest to the subject in the eye characteristic measuring unit 40, and is a ring pattern 47 in this embodiment. The first set working distance d1 is about 80 mm in this embodiment. This state is a measurement mode by the eye characteristic measurement unit 40, that is, an eye characteristic measurement mode.

  Accordingly, in this embodiment, the ophthalmologic apparatus 10 is configured such that the front end of the intraocular pressure measurement unit 20 (airflow spray nozzle 21b (nozzle protrusion 21h)) is positioned more than the front end (ring pattern 47) of the eye characteristic measurement unit 40. It is displaced to the Z axis direction positive side (subject side). This is due to the following. In the ophthalmologic apparatus 10, in the intraocular pressure measurement mode with the above-described configuration, as shown in FIG. 5A, a ring pattern 47 serving as the front end of the eye characteristic measurement unit 40 is placed in front of the subject's nose and mouth. To position. In the ophthalmologic apparatus 10, the intraocular pressure measurement unit 20 and the eye characteristic measurement unit 40 are integrated, and the positional relationship is not changed. Therefore, in the ophthalmologic apparatus 10, for example, when the front end of the intraocular pressure measurement unit 20 and the front end of the eye characteristic measurement unit 40 are set at the same position when viewed in the Z-axis direction (front-rear direction), in the intraocular pressure measurement mode, the ring The pattern 47 comes into contact with the subject's nose and mouth, or the ring pattern 47 gives the subject a cramped feeling even if it does not come into contact. In view of this, in the ophthalmologic apparatus 10, the front end of the intraocular pressure measurement unit 20 (airflow spray nozzle 21 b (nozzle protrusion 21 h)) is on the Z axis direction positive side with respect to the front end (ring pattern 47) of the eye characteristic measurement unit 40. By displacing them, a space is secured in front of the subject's nose and mouth in the tonometry mode.

  Accordingly, in this embodiment, the ophthalmologic apparatus 10 uses the eye characteristic measuring unit 40 to perform the measurement from the eye E (its cornea vertex Ea) to the front end of the eye characteristic measuring unit 40 (in this example, The first set working distance d1 to the ring pattern 47) is set to 75 mm or more (in this embodiment, about 80 mm). This is due to the following. The first set working distance d1 is a distance that enables the eye characteristic measuring unit 40 to perform the measurement of the eye E. When the eye characteristic measuring unit 40 performs the measurement, the eye E ( It becomes a reference position when moving in the Z-axis direction according to the state. For this reason, in the eye characteristic measurement unit 40, a movement width for moving from the first set working distance d1 to the positive side and the negative side in the Z-axis direction is set, and in this embodiment, the movement width is ± 20 mm. It is said that. In the ophthalmologic apparatus 10, as described above, the front end of the intraocular pressure measurement unit 20 (airflow spray nozzle 21 b (nozzle protrusion 21 h)) is more positive in the Z-axis direction than the front end (ring pattern 47) of the eye characteristic measurement unit 40. It is displaced to the side. Thereby, in the ophthalmologic apparatus 10, when the eye characteristic measurement mode is set, as shown in FIG. 5B, the intraocular pressure measurement is performed so as to face the forehead holding portion 16 that fixes the subject's face together with the jaw holder 15. The air blowing nozzle 21b (nozzle protrusion 21h) serving as the front end of the portion 20 is located. For this reason, in the ophthalmologic apparatus 10, when the first setting working distance d1 in the eye characteristic measurement unit 40 is small, when moving to the Z axis direction positive side (subject side) with the above movement width, There is a possibility that the front end (airflow spray nozzle 21b (nozzle projection 21h)) of the intraocular pressure measurement unit 20 may interfere with the forehead portion 16. In other words, in the ophthalmologic apparatus 10, in order to be able to move the eye characteristic measurement unit 40 from the first set working distance d1 to the Z axis direction positive side (subject side) with the above-described movement width, It is necessary to increase the first set working distance d1. For this reason, in the ophthalmologic apparatus 10, the first setting working distance d <b> 1 is set to 75 mm or more in the eye characteristic measurement unit 40, and is set to about 80 mm in this embodiment. Note that the setting of the first set working distance d1 can be performed by adjusting the setting of the optical characteristics of each optical member in the eye characteristic measuring unit 40. For this reason, in the ophthalmologic apparatus 10, the front end (airflow spray nozzle 21b (nozzle protrusion 21h)) of the intraocular pressure measurement unit 20 is displaced to the positive side in the Z-axis direction from the front end (ring pattern 47) of the eye characteristic measurement unit 40. Even in this case, when the eye characteristic measurement mode is set, the front end (airflow spray nozzle 21b (nozzle protrusion 21h)) of the intraocular pressure measurement unit 20 is reliably prevented from interfering with the forehead portion 16.

  In this ophthalmologic apparatus 10, generally, after measuring the shape of the cornea Ec of the eye E and the eye refractive power (spherical power, astigmatism power, astigmatic axis angle, etc.) of the eye E by the eye characteristic measuring unit 40, The intraocular pressure of the eye E is measured by the intraocular pressure measurement unit 20. In the ophthalmologic apparatus 10, as described above, the control unit 33 (see FIG. 2) controls the operation of each unit based on the operation performed on the display unit 14.

  When the power switch is turned on, the ophthalmologic apparatus 10 displays an intraocular pressure switching icon for the intraocular pressure measurement mode and an ocular characteristic switching icon for the eye characteristic measurement mode on the display unit 14. In addition, in this display unit 14, if it is possible to select and switch between the intraocular pressure measurement mode and the ocular characteristic measurement mode, instead of displaying the intraocular pressure switching icon and the ocular characteristic measurement mode, the display unit 14 The switching icon may be displayed, an icon in another format may be displayed, and the present invention is not limited to the configuration of the present embodiment. Alternatively, the measurement order may be set in advance, and after the measurement of the left and right eyes by the eye characteristic measurement unit 40 is completed, the measurement may be automatically shifted to the measurement by the tonometry unit 20 (intraocular pressure measurement mode). In the present embodiment, the display unit 14 first measures the shape of the cornea Ec of the eye E and the eye refractive power (spherical power, astigmatism power, astigmatic axis angle, etc.) of the eye E by the eye characteristic measuring unit 40. It is assumed that the eye characteristic switching icon is touched (selected).

  Then, in the ophthalmologic apparatus 10, the Y-axis drive portion 12a, the Z-axis drive portion 12b, and the X-axis drive portion 12c of the drive unit 12 are appropriately driven to enter the eye characteristic measurement mode (see FIG. 5B). That is, in the ophthalmologic apparatus 10, as shown in FIG. 5B, the eye E is positioned on the extension line of the main optical axis O <b> 10 of the eye characteristic measurement unit 40, and the fixation target projection optics of the eye characteristic measurement unit 40 is used. Assuming that the objective lens 41h of the system 41 is located at the first set working distance d1 from the eye E, the eye characteristic measuring unit 40 is made to correspond to the eye E. In the ophthalmologic apparatus 10, the shape of the cornea Ec of the eye E and the eye refractive power (spherical power, astigmatism power, astigmatic axis angle, etc.) of the eye E are measured by the above-described operation of the eye characteristic measurement unit 40. . Thereafter, in order to measure the intraocular pressure of the eye E, it is assumed that the intraocular pressure switching icon on the display unit 14 is touched (selected).

  Then, in the ophthalmologic apparatus 10, the Y-axis drive portion 12a, the Z-axis drive portion 12b, and the X-axis drive portion 12c of the drive unit 12 are appropriately driven to enter an intraocular pressure measurement mode (see FIG. 5A). Here, in the ophthalmic apparatus 10, first, the apparatus main body 13 is moved to the Y axis direction negative side, and the intraocular pressure measurement unit 20 is set to a height position corresponding to the eye E to be examined. At this time, in the ophthalmologic apparatus 10, the position of the CCD camera 21i on the optical axis O1 is set as the second focal position f2 (see FIG. 3) via the focusing drive mechanism 21D. Thereby, in the ophthalmologic apparatus 10, the image of the eye E (the anterior eye portion (cornea Ec)) can be appropriately displayed on the display unit 14. Thereafter, in the ophthalmologic apparatus 10, the apparatus main body 13 is moved to the positive side in the Z-axis direction to bring the intraocular pressure measurement unit 20 closer to the eye E to be examined, and as shown in FIG. Assuming that the tip of the nozzle 21b (nozzle protrusion 21h) is located at the second set working distance d2 from the eye E, the intraocular pressure measurement unit 20 is made to correspond to the eye E. At this time, in the ophthalmologic apparatus 10, the position of the CCD camera 21i on the optical axis O1 is moved to the first focal position f1 (see FIG. 3) via the focusing drive mechanism 21D. Thereby, in the ophthalmologic apparatus 10, the image of the eye E (the anterior eye portion (cornea Ec)) can be appropriately displayed on the display unit 14. In the ophthalmic apparatus 10, the intraocular pressure of the eye E is measured by the above-described operation of the intraocular pressure measurement unit 20.

  Thereby, in the ophthalmologic apparatus 10, the eye characteristic measurement unit 40 measures the shape of the cornea Ec of the eye E and the eye refractive power (spherical power, astigmatism power, astigmatic axis angle, etc.) of the eye E, and measures the intraocular pressure. The intraocular pressure of the eye E can be measured by the unit 20.

  Next, a characteristic configuration of the ophthalmologic apparatus 10 of the present embodiment according to the present invention will be described with reference to FIGS. FIG. 6 shows the positional relationship between the nozzle projection 21h (device main body 13) and the forehead portion 16 at the height position HL, but the concept of the height position HL is shown in an easily understandable manner. Therefore, it does not necessarily match the positional relationship in the actual apparatus. Further, FIG. 7 shows the positional relationship between the nozzle projection 21h (device main body 13) and the forehead portion 16 at each front position, but the concept of each front position is shown in an easy-to-understand manner. However, it does not necessarily match the positional relationship in the actual apparatus.

  In the ophthalmologic apparatus 10, as shown in FIG. 6, a height position detector 48 that detects that the apparatus body 13 has reached a predetermined height position HL is provided in the apparatus body 13. The height position HL is set from the viewpoint of preventing the nozzle protrusion 21 h (airflow spray nozzle 21 b) of the tonometry part 20 from interfering with the forehead holding part 16. When the apparatus main body 13 reaches the height position HL, the height position detector 48 outputs a signal indicating that to the controller 33 (see FIG. 2). Therefore, when the control unit 33 receives a signal from the height position detection unit 48 that the apparatus main body unit 13 has reached the height position HL, the nozzle projection 21h (airflow spraying) of the intraocular pressure measurement unit 20 The nozzle 21b) is located at a first height position H1 (nozzle protrusion 21h indicated by an imaginary line, see FIGS. 7A and 7B) that can interfere with the forehead portion 16. In addition, when the control unit 33 does not receive the signal from the height position detection unit 48, the second protrusion in which the nozzle projection 21 h (airflow spray nozzle 21 b) of the intraocular pressure measurement unit 20 does not interfere with the forehead portion 16. It is located at a position H2 (nozzle protrusion 21h indicated by a solid line, see FIGS. 7C and 7D). When the control unit 33 acquires the signal from the height position detection unit 48, the control unit 33 is in the intraocular pressure measurement mode, or when the intraocular pressure measurement unit 20 is on the positive side in the Z-axis direction (the subject) If it exists on the side), the movement of the apparatus main body 13 upward is stopped. The predetermined front-rear position is set from the viewpoint of preventing the airflow blowing nozzle 21b from interfering with the forehead portion 16 when viewed in the Z-axis direction. In this embodiment, a first front position FL1 described later is used. (See FIG. 7A).

  When the control unit 33 acquires a signal indicating that the apparatus main body 13 has reached the height position HL from the height position detection unit 48, the control unit 33 stops the upward movement of the apparatus main body 13, and the apparatus main body 13. Control according to the situation where is moved upward (Y-axis direction positive side) is executed. For example, when the apparatus main body 13 is moved upward based on an operation performed on the display unit 14, the control according to the situation may cause the display unit 14 to move further upward. It is possible to display that it cannot be performed, or to move the apparatus main body 13 upward after moving the apparatus main body 13 backward (moving) backward in the front-rear direction (Z-axis direction negative side). The control according to the situation is, for example, when the movement for switching from the intraocular pressure measurement unit 20 to the eye characteristic measurement unit 40 is performed, the device main body unit 13 is moved backward (Z-axis) in the front-rear direction. For example, the apparatus main body 13 may be moved upward after being retracted (moved) in the negative direction). Furthermore, when the control unit 33 acquires the signal from the height position detection unit 48 while performing automatic alignment in the intraocular pressure measurement unit 20, the control unit 33 re-detects the eye E. This is because when the automatic alignment in the tonometry part 20 is performed, the apparatus main body part 13 has reached the height position HL, and thus the detection of the eye E as the alignment reference has failed. By meaning.

  In addition, when the power switch of the ophthalmic apparatus 10 is turned on, the control unit 33 reaches the height position HL from the height position detection unit 48 before executing the movement of the device body 13. It is determined whether a signal to that effect is output. And the control part 33 performs the movement of the apparatus main body part 13 suitably, when the said signal is not output from the height position detection part 48. FIG. In addition, when the signal is output from the height position detection unit 48, the control unit 33 does not move the apparatus main body unit 13 upward, and performs control according to the situation. The control according to the situation indicates, for example, that when the operation of moving the apparatus main body 13 upward on the display unit 14 is performed, the display unit 14 cannot be moved further upward. Alternatively, the apparatus main body 13 may be moved upward after the apparatus main body 13 is moved backward in the front-rear direction (Z-axis direction negative side). Further, the control according to the situation is, for example, when the movement for switching from the intraocular pressure measurement unit 20 to the ocular characteristic measurement unit 40 is performed, the apparatus main body unit 13 is moved backward in the front-rear direction (Z-axis direction negative And the apparatus main body 13 is moved upward after being moved back (moved). Thereby, in the ophthalmologic apparatus 10, for example, the switching operation is performed from the intraocular pressure measurement unit 20 to the eye characteristic measurement unit 40, and the power switch is turned off in a state where the height position detection unit 48 outputs the above signal. Even when the power switch is turned on again, the movement of the apparatus main body 13 can be prevented while reliably preventing the nozzle projection 21h (airflow spray nozzle 21b) from interfering with the forehead holding portion 16. It can be carried out. In the example illustrated in FIG. 6, the height position detection unit 48 is provided in the apparatus main body 13, but the drive unit 12 that actually controls the position of the apparatus main body 13 in the height direction, that is, the Y-axis direction. It may be provided in the Y-axis drive portion 12a, or may be provided in another place, and is not limited to the present embodiment.

  Further, in the ophthalmologic apparatus 10, as shown in FIG. 7, a front position detecting unit 49 that detects that the apparatus main body 13 has reached each front position (FL1 to FL4) is provided in the apparatus main body 13. . In the present embodiment, a first front position FL1, a second front position FL2, a third front position FL3, and a fourth front position FL4 are set as the respective front positions. In the example shown in FIG. 7, the front positions (FL1 to FL4) are shown with the tip of the nozzle projection 21h (airflow spray nozzle 21b) as a reference. As will be described later, the first front position FL1 and the second front position FL2 are a predetermined distance (i1, i2) between the tip of the nozzle projection 21h (airflow blowing nozzle 21b) and the forehead holding portion 16. Therefore, it is possible to facilitate understanding by showing the tip as a reference. The third front position FL3 and the fourth front position FL4 can be easily understood by aligning the first front position FL1 and the second front position FL2 with the reference.

  As shown in FIG. 7 (a), the first front position FL1 is basically a forehead portion in which the nozzle projection 21h (airflow spray nozzle 21b) of the intraocular pressure measurement unit 20 is the forehead portion in the eye characteristic measurement mode. 16 is set from the viewpoint of preventing interference. That is, the first front position FL1 is the nozzle protrusion when the apparatus main body 13 is at the first height position H1 at which the nozzle protrusion 21h (airflow spray nozzle 21b) and the forehead portion 16 can interfere with each other. The first interval i1 is set so as to be provided between the tip of 21h and the forehead portion 16. The first interval i1 is set to be as small as possible on the premise that interference between the tip of the nozzle projection 21h and the forehead holding portion 16 can be reliably prevented. The first interval i1 is 1 mm in this embodiment. Therefore, in the present embodiment, the first front position FL1 is a position in the apparatus main body 13 where the distance between the tip of the nozzle projection 21h and the forehead holding portion 16 is 1 mm which is the first interval i1. The first interval i1 (first front position FL1) may be set as appropriate, and is not limited to this embodiment. The first interval i1 may be set as appropriate by the user (examiner).

  As shown in FIG. 7B, the second front position FL2 is basically more than the first interval i1 between the tip of the nozzle projection 21h and the forehead holding portion 16 in the eye characteristic measurement mode. It is set so as to be able to provide a large second interval i2. The second interval i <b> 2 corresponds to the forehead portion 16 when the apparatus main body portion 13 is at the first height position H <b> 1 where the nozzle projection 21 h (airflow spray nozzle 21 b) and the forehead portion 16 can interfere with each other. It is set from the viewpoint of preventing the hand H (see FIG. 8) being hung from being sandwiched between the forehead portion 16 by the nozzle projection 21h (airflow spray nozzle 21b) of the intraocular pressure measurement unit 20. . This is because, as shown in FIG. 8, it is considered that the subject holds the forehead holding part 16 with the hand H in order to stabilize his / her face. Although illustration is omitted, for example, when the examiner opens the subject's eyelid, it is also conceivable that the forehead portion 16 is handled. As described above, the second interval i2 is set from the viewpoint of preventing the hand H located between the tip of the nozzle projection 21h and the forehead holding portion 16 from being sandwiched, and in this embodiment, the second interval i2 is set to 15 mm. Yes. Therefore, in the present embodiment, the second front position FL2 is a position in the apparatus main body 13 where the distance between the tip of the nozzle projection 21h and the forehead holding portion 16 is 15 mm, which is the second distance i2. The second interval i2 (second forward position FL2) may be set as appropriate, and is not limited to this embodiment. The second interval i2 may be set as appropriate by the user (examiner).

  As shown in FIG. 7 (c), the third front position FL3 indicates that the hand H (see FIG. 8) hung on the forehead portion 16 is basically used when the intraocular pressure measurement mode is used. 20 (apparatus main body portion 13) is set from the viewpoint of preventing the spray mechanism wall portion 21k serving as the outer wall surface above the nozzle projection portion 21h from being caught between the forehead portion 16. For this reason, when the apparatus main body 13 is set to the second height position H2 at which the nozzle projection 21h (airflow spray nozzle 21b) and the forehead support 16 do not interfere with each other, the third front position FL3 The second interval i <b> 2 is set to be possible between the portion 21 k and the forehead portion 16. Note that the third forward position FL3 may be a space different from the second space i2 between the spray mechanism wall 21k and the forehead portion 16 and is not limited to this embodiment.

  As shown in FIG. 7 (d), the fourth front position FL4 indicates that the spray mechanism wall portion 21k of the intraocular pressure measurement unit 20 interferes with the forehead portion 16 when basically in the intraocular pressure measurement mode. It is set from the viewpoint of prevention. That is, when the apparatus main body 13 is set to the second height position H2 at which the nozzle projection 21h (airflow spray nozzle 21b) and the forehead support 16 do not interfere with each other, the fourth front position FL4 is the spray mechanism wall. The first interval i1 is set so as to be provided between 21k and the forehead portion 16. Note that the fourth front position FL4 may be a space different from the first space i1 between the spray mechanism wall 21k and the forehead portion 16, and is not limited to this embodiment.

  And if the apparatus main body part 13 arrives at each front position (FL1-FL4), the front position detection part 49 will each output the signal which shows that to the control part 33 (refer FIG. 2). Here, since each of the front positions (FL1 to FL4) is set as described above, the front position detection unit 49 is configured such that the apparatus main body 13 (nozzle protrusion 21h) is moved from the first front position FL1 to the second front position. When positioned between the positions FL2, a signal indicating that the second front position FL2 has been reached is output to the control unit 33. Similarly, the front position detector 49 has reached the third front position FL3 when the apparatus main body 13 (blowing mechanism wall 21k) is located between the third front position FL3 and the fourth front position FL4. Is output to the control unit 33. The control unit 33 basically executes control according to the following situation for each signal from the front position detection unit 49. Here, when the control unit 33 acquires a signal indicating that the height position HL is the height position HL from the height position detection unit 48 (the first height position H1), the control unit 33 receives the signal from the front position detection unit 49. There is a possibility of acquiring a signal indicating that the apparatus main body 13 (nozzle projection 21h (airflow spray nozzle 21b)) has reached the first front position FL1 or the second front position FL2. Note that when the front position detection unit 49 outputs a signal regardless of the height position, the control unit 33 determines that the third front position from the front position detection unit 49 is the first height position H1. Even if a signal indicating that the position FL3 or the fourth forward position FL4 has been reached is acquired, no control is performed. Further, in the case where the control unit 33 has not acquired a signal indicating that the height position HL has been set from the height position detection unit 48 (the second height position H2), the control unit 33 starts the apparatus from the front position detection unit 49. There is a possibility that a signal indicating that the main body portion 13 (the spray mechanism wall portion 21k) has reached the third front position FL3 or the fourth front position FL4 may be obtained. When the front position detection unit 49 outputs a signal regardless of the height position, the control unit 33 determines that the first front position from the front position detection unit 49 is the second height position H2. Even if a signal indicating that the position FL1 or the second front position FL2 has been obtained is acquired, no control is performed.

  When the control unit 33 obtains a signal indicating that the device main body 13 (nozzle projection 21h (airflow blowing nozzle 21b)) has reached the first front position FL1 from the front position detection unit 49, the control unit 33 moves forward. Stop moving. That is, in the ophthalmologic apparatus 10 (control unit 33), when the nozzle protrusion 21h (airflow spray nozzle 21b) is at the first height position H1, the eye E to be examined (Z axis direction positive side) from the first front position FL1. ) Is set as a movement prohibited area. The control unit 33 executes control according to the situation in which the apparatus main body 13 is moved forward as the apparatus main body 13 stops moving forward. For example, when the apparatus main body 13 is moved forward based on an operation performed on the display unit 14, the control according to the situation means that the display unit 14 may move further forward. It is possible to display that it is not possible. Further, when the power switch of the ophthalmic apparatus 10 is turned on, the control unit 33 outputs a signal indicating that the first front position FL1 has been reached from the front position detection unit 49 before the movement of the apparatus main body unit 13 is executed. It is judged whether it is done. And the control part 33 is a case where it is a case where the signal to the effect that it is set as the height position HL is acquired from the height position detection part 48, Comprising: The fact that it reached | attained 1st front position FL1 from the front position detection part 49 When the above signal is not output, the apparatus main body 13 is appropriately moved. Further, when the signal indicating that the first position FL1 has been reached is output from the front position detector 49, the controller 33 does not move the apparatus main body 13 forward, and performs control according to the situation. Run. The control according to the situation means that, for example, when an operation for moving the apparatus main body 13 forward is performed on the display unit 14, the display unit 14 displays that no further forward movement is possible. Can be mentioned.

  In addition, when the control unit 33 obtains a signal from the front position detection unit 49 that the apparatus main body unit 13 (nozzle protrusion 21h (airflow spray nozzle 21b)) has reached the second front position FL2, it issues a warning. That is, in the ophthalmologic apparatus 10 (control unit 33), when the nozzle projection 21h (airflow spray nozzle 21b) is at the first height position H1, the eye E to be examined (Z axis direction positive side) from the second front position FL2. ) Is set as the movement warning area. In the present embodiment, this warning is performed by generating a warning sound from a warning sound generating unit 51 provided in the apparatus main body 13 under the control of the control unit 33. Note that this warning may be performed by providing a warning lamp in the apparatus main body 13 and turning on (flashing) the warning lamp under the control of the control unit 33, and informs the display unit 14 of this. Display may be used, and a vibration generator may be provided in the apparatus main body 13 to generate vibration, and the present invention is not limited to the configuration of this embodiment. The control unit 33 may temporarily stop the forward movement of the apparatus main body 13 when issuing a warning. In this case, if the operation of moving the apparatus main body 13 forward again is performed after the temporary stop, or the operation for continuing the automatic alignment is performed again, the apparatus main body 13 is moved forward again. It shall be allowed to move. This is because the user (inspector) recognizes the warning that an operation to move the apparatus body 13 forward or an operation to continue the automatic alignment is performed after the warning. This is because the intention to continue after confirming safety was indicated. The safety confirmation means that the hand H has not been put on the forehead portion 16 or the hand H has been released from the forehead portion 16 or the subject has stopped putting the hand H on the forehead portion 16. That's it. Alternatively, a time for temporarily stopping may be set in advance, and when the set time has elapsed, the forward movement of the apparatus main body 13 may be permitted again. Further, when a hand detection unit capable of detecting that the hand H is put on the forehead holding unit 16 is provided as described later, when it is detected that the hand H is separated from the forehead holding unit 16, the apparatus is again operated. The main body part 13 may be allowed to move forward.

  Furthermore, if the control part 33 acquires the signal that the apparatus main body part 13 (blowing mechanism wall part 21k) reached | attained 3rd front position FL3 from the front position detection part 49, it acquired the signal of 2nd front position FL2. The same control as in the case is performed and a warning is issued. That is, in the ophthalmologic apparatus 10 (control unit 33), when the nozzle projection 21h (airflow spray nozzle 21b) is at the second height position H2, the eye E (the Z axis direction positive side) from the third front position FL3. ) Is set as the movement warning area. Even in this case, as in the case where the signal of the second front position FL2 is acquired, when the warning is issued, the forward movement of the apparatus main body 13 may be temporarily stopped.

  In addition, when the control unit 33 acquires a signal indicating that the device main body 13 (spraying mechanism wall 21k) has reached the fourth front position FL4 from the front position detection unit 49, the control unit 33 moves the device main body 13 forward. Stop. That is, in the ophthalmologic apparatus 10 (control unit 33), when the nozzle projection 21h (airflow spray nozzle 21b) is at the second height position H2, the eye E side (Z-axis direction positive side) from the fourth front position FL4. ) Is set as a movement prohibited area. The control unit 33 executes control according to the situation in which the apparatus main body 13 is moved forward as the apparatus main body 13 stops moving forward. For example, when the apparatus main body 13 is moved forward based on an operation performed on the display unit 14, the control according to the situation means that the display unit 14 may move further forward. It is possible to display that it is not possible. Further, when the power switch of the ophthalmologic apparatus 10 is turned on, the control unit 33 outputs a signal indicating that the front position detection unit 49 has reached the fourth front position FL4 before the movement of the apparatus main body unit 13 is executed. It is judged whether it is done. And the control part 33 is a case where the signal to the effect that it is set as the 2nd height position H2 is acquired from the height position detection part 48, Comprising: It arrives at the 4th front position FL4 from the front position detection part 49. When the signal indicating that the operation has been performed is not output, the apparatus main body 13 is moved as appropriate. Further, when a signal indicating that the fourth front position FL4 has been reached is output from the front position detection unit 49, the control unit 33 does not move the apparatus main body unit 13 forward, and performs control according to the situation. Run. The control according to the situation means that, for example, when an operation for moving the apparatus main body 13 forward is performed on the display unit 14, the display unit 14 displays that no further forward movement is possible. Can be mentioned.

  In the example shown in FIG. 7, the front position detection unit 49 is provided in the apparatus main body 13. It may be provided in the shaft drive portion 12b or may be provided in another place, and is not limited to the present embodiment. In the example shown in FIG. 7, the warning sound generation unit 51 is provided in the apparatus main body unit 13, but any other device can be used as long as the warning sound can be heard by the examiner or the subject. It may be provided at a place and is not limited to the present embodiment.

  Next, a safety ensuring notification method as one embodiment for ensuring safety performed when the apparatus main body 13 is moved to the eye E side (the Z axis direction positive side) is executed in the control unit 33. The safety ensuring notification process to be performed will be described with reference to FIG. FIG. 9 is a flowchart showing the safety ensuring notification process (safety ensuring notification method) executed by the control unit 33 in the present embodiment. This safety ensuring notification process (safety ensuring notification method) is executed by the control unit 33 based on a program stored in a storage unit built in the control unit 33 or a storage unit provided outside the control unit 33. This safety ensuring notification process (safety ensuring notification method) is only control for the movement of the apparatus main body 13 to the eye E side (the positive side in the Z-axis direction), and the movement in the other direction is also performed. If done, it does not affect the movement in the other direction. Here, it goes without saying that movement in other directions can be limited by other control (for example, control according to the signal from the height position detection unit 48 described above).

  In the safety ensuring notification process (safety ensuring notification method), the control unit 33 starts from the front position detection unit 49 to each front position (first front position FL1, second front position FL2, third front position FL3, fourth front position FL4). ) Is input, a notification or movement restriction is performed according to the signal. In this safety ensuring notification process (safety ensuring notification method), it is determined whether or not the apparatus main body 13 from the height position detection unit 48 has reached the height position HL, that is, whether it is positioned at the first height position H1. Judgment processing is performed in combination with a signal indicating whether or not it is located at the two-height position H2. Below, each step (each process) of the flowchart of FIG. 9 as this safety ensuring alerting | reporting process (safety ensuring alerting | reporting method) is demonstrated. This flowchart (safety ensuring notification process (safety ensuring notification method)) is performed by the apparatus main body 13 regardless of whether it is movement (manual movement) or automatic movement (automatic movement) by the examiner. It is executed while moving to the optometry E side (Z-axis direction positive side).

  In step S1, various information related to the safety ensuring notification process is acquired, and the process proceeds to step S2. In this step S1, various information used for determination in the safety ensuring notification process is acquired. In this embodiment, the various information includes the presence / absence of a signal indicating that the apparatus main body 13 from the height position detection unit 48 has reached the height position HL, and the apparatus main body 13 from the front position detection unit 49. The presence / absence and type of a signal indicating that each front position (FL1 to FL4) has been reached, and whether or not a notification function described later is enabled.

  In step S2, following the acquisition of various information related to the safety ensuring notification process in step S1, it is determined whether or not the apparatus body 13 has reached the height position HL. If yes, the process proceeds to step S3. If no, the process proceeds to step S8. In step S2, if the signal indicating that the apparatus main body 13 has reached the height position HL has been received from the height position detector 48, the apparatus main body 13 has reached the height position HL. It is determined that the nozzle projection 21h (airflow spray nozzle 21b) of the intraocular pressure measurement unit 20 is located at the first height position H1. In this case, in step S2, since the nozzle projection 21h is at the first height position H1, a signal indicating that the nozzle has reached the first front position FL1 or the second front position FL2 from the front position detection unit 49 is used. Therefore, the process proceeds to step S3. In step S2, if the signal is not received from the height position detection unit 48, the apparatus main body 13 has not reached the height position HL, that is, the nozzle projection 21h (airflow spraying) of the intraocular pressure measurement unit 20 It is determined that the nozzle 21b) is located at the second height position H2. In this case, in step S2, since the nozzle projection 21h is at the second height position H2, a signal indicating that the nozzle has reached the third front position FL3 or the fourth front position FL4 from the front position detection unit 49 is used. Therefore, the process proceeds to step S8.

  In step S3, following the determination that the apparatus main body 13 has reached the height position HL in step S2, it is determined whether or not the notification function is enabled. If yes, the process proceeds to step S4. If No, the process proceeds to step S6. In step S3, it is determined whether or not the notification function is enabled, that is, whether or not it is notified that the movement warning area (the eye E to be examined from the second front position FL2) has been reached. This determination can be made, for example, by displaying an icon for selecting whether to enable or disable the notification function on the display unit 14 and determining an operation result by the examiner on the icon. . The selection of whether or not to enable the notification function by the examiner may be made by other methods as long as the control unit 33 can determine the result of the selection. It is not limited to this example. Whether or not the notification function is valid is determined by providing a hand detection unit that can detect that the hand H is being placed on the forehead holding unit 16, and the hand detection unit has a hand H on the forehead holding unit 16. The notification function may be validated when it is detected that it is applied, and the notification function may be invalidated when there is no such detection. As this hand detection unit, for example, it is detected that a hand H such as a pressure-sensitive sensor or an electrostatic sensor is present on the surface of the forehead portion 16 facing the nozzle protrusion 21h (airflow spray nozzle 21b). It is possible to provide possible sensors. As the hand detection unit, for example, an optical sensor, a camera, or the like that can detect the presence of the hand H on the surface of the forehead portion 16 that faces the nozzle projection 21h (airflow spray nozzle 21b). It can be provided.

  In step S4, following the determination that the notification function in step S3 is enabled, it is determined whether or not the apparatus body 13 is in the movement warning area. If yes, the process proceeds to step S5. In this case, the process proceeds to step S6. In step S4, it is determined whether or not a signal indicating that the apparatus main body 13 (nozzle projection 21h (airflow spray nozzle 21b)) has reached the second front position FL2 is obtained from the front position detection unit 49. In step S4, if the signal is acquired, it is determined that the apparatus body 13 is in the movement warning area, and the process proceeds to step S5. If the signal is not acquired, the apparatus body 13 is It judges that it is not in the movement warning area and proceeds to step S6.

  In step S5, following the determination that the apparatus main body 13 is in the movement warning area in step S4, a warning is issued and the process proceeds to step S6. In step S5, since the notification function is enabled and the nozzle projection 21h (airflow spray nozzle 21b) is in the movement warning area, a warning is issued. In this embodiment, this warning is performed by generating a warning sound from the warning sound generating unit 51 as described above. Note that when it is determined that the apparatus main body 13 has not reached the height position HL in step S2 repeated thereafter, this warning is determined that the notification function is not enabled in step S3 repeated thereafter. If it is determined that the movement warning area is not entered in step S4 repeated thereafter, the process stops. Here, the case where the apparatus main body 13 has not reached the height position HL is included in that case by using the third front position FL3 or the fourth front position FL4 as a determination criterion as described above. In step S5, as described above, when issuing a warning, the forward movement of the apparatus main body 13 may be temporarily stopped.

  In step S6, it is determined that the notification function in step S3 is not valid, or it is determined in step S4 that the apparatus body 13 is not in the movement warning area, or a warning in step S5 is issued. Following the issuing, it is determined whether or not the apparatus body 13 has reached the movement prohibited area. If Yes, the process proceeds to Step S7, and if No, the process proceeds to Step S13. In this step S6, it is determined whether or not a signal indicating that the apparatus main body 13 (nozzle projection 21h (airflow spray nozzle 21b)) has reached the first front position FL1 is obtained from the front position detector 49. In step S6, if the signal is acquired, it is determined that the apparatus body 13 has reached the movement prohibited area, and the process proceeds to step S7. If the signal is not acquired, the apparatus body 13 is moved. It is determined that the prohibited area has not been reached, and the process proceeds to step S13.

  In step S7, following the determination that the apparatus main body 13 has reached the movement prohibited area in step S6, the forward movement of the apparatus main body 13 is stopped, and the process proceeds to step S13. In step S7, since the apparatus main body 13 has reached the movement prohibition area, it is assumed that the apparatus main body 13 is not moved further forward, that is, the eye E (Z-axis direction positive side). In addition, the control according to the situation is performed as the movement is stopped.

  In step S8, following the determination that the apparatus main body 13 has not reached the height position HL in step S2, it is determined whether or not the notification function is enabled. If Yes, the process proceeds to step S9. If No, the process proceeds to step S11. In step S8, it is determined whether or not the notification function is enabled, that is, whether or not it is notified that the movement warning area (the eye E to be examined from the third front position FL3) has been reached. This determination is the same as in step S3.

  In step S9, following the determination that the notification function in step S8 is enabled, it is determined whether or not the apparatus body 13 is in the movement warning area. If yes, the process proceeds to step S10. In this case, the process proceeds to step S11. In this step S9, it is determined whether or not a signal indicating that the apparatus main body 13 (blowing mechanism wall 21k) has reached the third front position FL3 is obtained from the front position detector 49. In step S9, if the signal is acquired, it is determined that the apparatus body 13 is in the movement warning area, and the process proceeds to step S10. If the signal is not acquired, the apparatus body 13 is It judges that it is not in the movement warning area and proceeds to step S11.

  In step S10, following the determination that the apparatus main body 13 is in the movement warning area in step S9, a warning is issued and the process proceeds to step S11. In step S10, since the notification function is enabled and the spray mechanism wall 21k is in the movement warning area, a warning is issued. In this embodiment, this warning is performed by generating a warning sound from the warning sound generating unit 51 as described above. In the case where it is determined that the apparatus main body 13 has reached the height position HL in step S2 repeated thereafter, this warning is determined in the case where it is determined that the notification function is not enabled in step S8 repeated thereafter. If it is determined that the movement warning area is not entered in step S9 repeated thereafter, the process stops. Here, the case where the apparatus main body 13 reaches the height position HL includes the case where the determination is based on the first front position FL1 or the second front position FL2 as described above.

  In step S11, a determination is made that the notification function in step S8 is not valid, a determination in step S9 that the apparatus main body 13 is not in the movement warning area, or a warning in step S10. Next to issuing, it is determined whether or not the apparatus body 13 has reached the movement prohibited area. If Yes, the process proceeds to Step S12, and if No, the process proceeds to Step S13. In this step S11, it is determined whether or not a signal indicating that the apparatus main body 13 (blowing mechanism wall 21k) has reached the fourth front position FL4 has been acquired from the front position detector 49. In step S11, if the signal is acquired, it is determined that the apparatus main body 13 has reached the movement prohibited area, and the process proceeds to step S12. If the signal is not acquired, the apparatus main body 13 is moved. It judges that it is not in the prohibited area and proceeds to step S13.

  In step S12, following the determination that the apparatus main body 13 has reached the movement prohibited area in step S11, the apparatus main body 13 stops moving forward, and the process proceeds to step S13. In step S12, since the apparatus main body 13 has reached the movement prohibition area, the apparatus main body 13 is not moved further forward, that is, the eye E side (the Z axis direction positive side). In addition, the control according to the situation is performed as the movement is stopped.

  In step S13, it is determined that the apparatus main body 13 has not reached the movement prohibition area in step S6, or the forward movement of the apparatus main body 13 in step S7 is stopped, or in step S11. Following the determination that the apparatus main body 13 has not reached the movement prohibition area or the forward movement of the apparatus main body 13 in step S12, an operation for stopping the warning has been performed. It is determined whether or not, if Yes, the process proceeds to Step S14, and if No, the process proceeds to Step S15. In step S13, it is determined whether or not an operation for stopping the warning issued in step S5 or step S10 has been performed (in this embodiment, the warning sound is stopped). The operation to stop the warning can be performed, for example, by displaying a warning stop icon on the display unit 14 and touching the warning stop icon.

  In step S14, following the determination that the operation to stop the warning in step S13 has been performed, the notification function is limitedly disabled, and the process proceeds to step S15. In step S14, since the operation to stop the warning has been performed, the notification function is performed only while the movement of the apparatus main body 13 to the eye E side (the Z axis direction positive side) is continued. Is invalid.

  In step S15, following the determination that the operation to stop the warning in step S13 has not been performed, or the notification function in step S14 being limitedly disabled, It is determined whether or not the movement to the optometry E side (Z-axis direction positive side) has been completed. If Yes, the safety ensuring notification process (safety ensuring notification method) ends, and if No, the process returns to Step S1. In step S15, the forward movement of the apparatus main body 13 is completed, that is, the situation in which the apparatus main body 13 is about to move to the eye E side (the Z axis direction positive side) is eliminated. It is determined whether it is no longer necessary to perform processing. For this reason, when the said movement is complete | finished, this safety ensuring alerting | reporting process is complete | finished, and when the said movement is continued, it returns to step S1 to continue the safety ensuring alerting | reporting process. Note that the end of the forward movement of the apparatus main body 13 does not include the case where the forward movement of the apparatus main body 13 is stopped in Step S7 or Step S12. This is a scene in which the movement is stopped in step S7 or step S12 because the movement is stopped in spite of a signal to move the apparatus main body 13 forward. Because it is not a translation.

  Next, the operation of the ophthalmologic apparatus 10 when the apparatus main body 13 is moved to the eye E (Z axis direction positive side) will be described. First, the notification function is enabled and the eye characteristic measurement mode is set. The apparatus main body 13 is moved to the eye E (Z-axis direction positive side), and the apparatus main body 13 (nozzle protrusion 21h) is still in use. ) Does not reach the second front position FL2. Then, in the flowchart of FIG. 9, by proceeding from step S1 to step S2, a signal indicating that the apparatus main body 13 has reached the height position HL is received from the height position detector 48, and the nozzle protrusion It is determined that 21h (airflow spray nozzle 21b) is located at the first height position H1. In the flowchart of FIG. 9, by proceeding from step S3 → step S4 → step S6 → step S13 → step S15, the eye E side of the apparatus main body 13 (Z-axis direction) does not cause any action. Move to the positive side).

  When the apparatus main body 13 (nozzle protrusion 21h) reaches the second front position FL2 (see FIG. 7B) by the movement, in the flowchart of FIG. 9, step S15 → step S1 → step S2 → step S3. A warning is issued by proceeding from step S4 to step S5. The examiner recognizes the warning and confirms safety, and then performs an operation to stop the warning. Then, in step S6 → step S13 → step S14 in the flowchart of FIG. 9, the notification function is limitedly disabled, and in step S15 → step S1 → step S2 → step S3 in the flowchart of FIG. Will stop the warning. At this time, the movement of the apparatus main body 13 toward the eye E (Z axis direction positive side) is continued, and the apparatus main body 13 (nozzle protrusion 21h) is moved to the first front position FL1 (FIG. 7). (See (a)). Then, in the flowchart of FIG. 9, the process proceeds from step S <b> 6 to step S <b> 7, thereby stopping the movement of the apparatus main body 13 toward the eye E (Z axis direction positive side). For this reason, the apparatus main body 13 does not move from the first front position FL1 toward the eye E (Z-axis direction positive side), and the nozzle projection 21h (the tip) interferes with the forehead portion 16. This can be prevented.

  In addition, for example, the notification function is enabled and the intraocular pressure measurement mode is set, and the apparatus main body 13 is moved to the eye E (Z-axis direction positive side). It is assumed that the wall 21k) does not reach the third front position FL3. Then, in the flowchart of FIG. 9, by proceeding from step S1 to step S2, a signal indicating that the apparatus main body 13 has not reached the height position HL is received from the height position detection unit 48, and the nozzle protrusion It is determined that 21h (airflow spray nozzle 21b) is located at the second height position H2. In the flowchart of FIG. 9, by proceeding from step S8 → step S9 → step S11 → step S13 → step S15, the eye E side of the apparatus main body 13 (Z-axis direction) does not cause any action. Move to the positive side).

  When the apparatus main body 13 (spraying mechanism wall 21k) reaches the third front position FL3 (see FIG. 7C) by the movement, in the flowchart of FIG. 9, step S15 → step S1 → step S2 → step A warning is issued by proceeding from S8 to step S9 to step S10. The examiner recognizes the warning and confirms safety, and then performs an operation to stop the warning. Then, in step S11 → step S13 → step S14 in the flowchart of FIG. 9, the notification function is limitedly disabled. In the flowchart of FIG. 9, step S15 → step S1 → step S2 → step S8. Will stop the warning. At this time, the movement of the apparatus main body 13 toward the eye E (Z axis direction positive side) is continued, and the apparatus main body 13 (blowing mechanism wall 21k) is moved to the fourth front position FL4 (FIG. 7 (d)). Then, in the flowchart of FIG. 9, the process proceeds from step S <b> 11 to step S <b> 12, thereby stopping the movement of the apparatus main body 13 toward the eye E (the Z axis direction positive side). For this reason, the apparatus main body 13 does not move from the fourth front position FL4 to the eye E side (the positive side in the Z-axis direction) and prevents the spray mechanism wall 21k from interfering with the forehead portion 16. can do.

  In the ophthalmologic apparatus 10 as one embodiment of the ophthalmic apparatus according to the present invention, when the apparatus main body 13 moves to the eye E side (the Z axis direction positive side), the apparatus main body 13 is in the second front position. When FL2 is reached, a warning is issued. For this reason, the examiner recognizes that the hand H may be caught between the nozzle projection 21h (airflow spray nozzle 21b) of the intraocular pressure measurement unit 20 of the apparatus main body unit 13 and the forehead holding unit 16. Can do. As a result, the examiner does not place a hand H on the forehead holding portion 16, releases the hand H from the forehead holding portion 16, or places a hand H on the forehead holding portion 16 on the subject. The safety can be confirmed by stopping the operation, and the hand H can be prevented from being caught between the nozzle projection 21h (airflow spray nozzle 21b) and the forehead portion 16.

  Further, in the ophthalmologic apparatus 10, when the apparatus main body 13 moves to the eye E (Z axis direction positive side), when the apparatus main body 13 reaches the first front position FL1, the apparatus main body 13 is moved. Stop movement to the optometry E side (Z-axis direction positive side). For this reason, in the ophthalmologic apparatus 10, it can prevent reliably that the nozzle protrusion part 21h (airflow spray nozzle 21b) of the intraocular pressure measurement part 20 interferes with the forehead holding part 16. FIG.

  Furthermore, in the ophthalmologic apparatus 10, even when the apparatus main body 13 reaches the second front position FL2, the apparatus main body 13 moves to the eye E (Z-axis direction positive side) from the second front position FL2. It is not completely prohibited to do. For this reason, in the ophthalmologic apparatus 10, it is possible to reduce the movable range of the apparatus main body 13 while preventing the hand H from being caught between the nozzle protrusion 21h (airflow spray nozzle 21b) and the forehead holding portion 16. Can be prevented, and usability can be improved.

  In the ophthalmologic apparatus 10, when the apparatus main body 13 reaches the second front position FL2, the interval between the nozzle projection 21h (airflow spray nozzle 21b) of the intraocular pressure measurement unit 20 and the forehead holding portion 16 is set as the second interval i2. . The second interval i2 is set from the viewpoint of preventing the hand H located between the tip of the nozzle projection 21h (airflow spray nozzle 21b) and the forehead holding portion 16 from being pinched. For this reason, in the ophthalmologic apparatus 10, it is possible to more reliably prevent the hand H from being sandwiched between the nozzle protrusion 21 h (airflow spray nozzle 21 b) and the forehead portion 16.

  In the ophthalmologic apparatus 10, when the apparatus main body 13 reaches the first front position FL1, a distance between the nozzle protrusion 21h (airflow spray nozzle 21b) of the intraocular pressure measurement unit 20 and the forehead support unit 16 is set to a first interval i1. . The first interval i1 is set to be as small as possible on the premise that interference between the tip of the nozzle projection 21h and the forehead holding portion 16 can be reliably prevented. For this reason, in the ophthalmologic apparatus 10, while being able to prevent reliably the nozzle protrusion part 21h (airflow spray nozzle 21b) and the forehead holding part 16, the reduction | decrease of the movable range of the apparatus main body part 13 is prevented. be able to.

  In the ophthalmologic apparatus 10, when the notification function is disabled, a warning is not issued even when the apparatus main body 13 reaches the second front position FL2, so that the usability can be improved. That is, the hand H may be sandwiched between the nozzle protrusion 21h (airflow spray nozzle 21b) and the forehead holding part 16 by measuring after confirming that the hand H is not put on the forehead holding part 16. If not, such warnings can be annoying.

  In the ophthalmologic apparatus 10, the front position detection unit 49 provided in the apparatus main body 13 detects that the device main body 13 has reached each front position (first front position FL1, second front position FL2). Therefore, it is possible to reliably detect that each front position has been reached with a simple configuration.

  In the ophthalmologic apparatus 10, the third forward position FL3 and the fourth forward position FL4 are set for the spray mechanism wall 21k of the apparatus main body 13, and the nozzle protrusion 21h (airflow spray nozzle 21b) is set. Similar control is performed. For this reason, in the ophthalmologic apparatus 10, further safety can be ensured and usability can be improved.

  In the ophthalmologic apparatus 10, the hand detection unit detects that the hand H is placed on the forehead holding unit 16 by providing a hand detection unit that can detect that the hand H is placed on the forehead holding unit 16. In such a case, the notification function can be enabled, and the notification function can be disabled if there is no such detection. Therefore, in the ophthalmologic apparatus 10, a warning is given when the apparatus main body 13 reaches the second front position FL2 only when the hand H is actually hung on the forehead holding portion 16 without any particular setting by the examiner. Can be issued. Thereby, in the ophthalmologic apparatus 10, usability can be improved more.

  In the ophthalmologic apparatus 10, when the apparatus main body 13 reaches the second front position FL2 and issues a warning, the forward movement of the apparatus main body 13 can be temporarily stopped. For this reason, in the ophthalmologic apparatus 10, even when the hand H is put on the forehead holding part 16, the examiner releases the hand H from the forehead holding part 16, or the examinee moves the hand to the forehead holding part 16. Safety can be confirmed with a margin by stopping the application of H. Thereby, in the ophthalmologic apparatus 10, usability can be improved more.

  In the ophthalmologic apparatus 10, when the apparatus main body 13 reaches the second front position FL2 and issues a warning, the apparatus main body 13 is temporarily stopped from moving forward, and the apparatus main body 13 is moved forward again. When an operation for moving is performed or an operation for continuing the automatic alignment is performed, it is possible to permit the apparatus main body 13 to move forward again. For this reason, in the ophthalmologic apparatus 10, since the apparatus main body part 13 moves forward again by performing the above-described operation after confirming safety, the apparatus main body part 13 is moved while ensuring safety more reliably. Can be made. Thereby, in the ophthalmologic apparatus 10, usability can be improved more.

  In the ophthalmologic apparatus 10, when the apparatus main body 13 reaches the second front position FL2 and issues a warning, the forward movement of the apparatus main body 13 is temporarily stopped, and the time to temporarily stop is set in advance. Then, when the set time elapses, the forward movement of the apparatus main body 13 can be permitted again. For this reason, in the ophthalmologic apparatus 10, when the safety is confirmed, the apparatus main body 13 moves forward again without performing any operation. Therefore, the apparatus main body 13 can be quickly moved while ensuring safety. it can. Thereby, in the ophthalmologic apparatus 10, usability can be improved more.

  In the ophthalmologic apparatus 10, when the apparatus main body 13 reaches the second front position FL2 and issues a warning, the forward movement of the apparatus main body 13 is temporarily stopped, and the forehead portion as described above 16 is provided with a hand detection unit that can detect that the hand H is hung. When the hand H is hung on the forehead holding unit 16, the forward movement of the apparatus body 13 is stopped, and the forehead holding unit When the hand H is released from 16, the forward movement of the apparatus main body 13 can be permitted again. For this reason, in the ophthalmologic apparatus 10, when the apparatus main body 13 reaches the second front position FL2 only when the hand H is actually hung on the forehead holding portion 16 without any particular setting by the examiner, The forward movement of the main body portion 13 can be temporarily stopped, and the apparatus main body portion 13 can be quickly moved forward when the hand H is separated from the forehead holding portion 16. Thereby, in the ophthalmologic apparatus 10, usability can be improved more.

  Therefore, in the ophthalmologic apparatus 10 as an embodiment of the ophthalmologic apparatus according to the present invention, the intraocular pressure measurement unit 20 as the measurement unit is prevented from interfering with the forehead holding unit 16 and is hung on the forehead holding unit 16. It is possible to prevent the hand H from being pinched by the intraocular pressure measurement unit 20 as a measurement unit.

  In the above-described embodiment, the ophthalmologic apparatus 10 as an embodiment of the ophthalmologic apparatus according to the present invention has been described, but the first set at the first set working distance in order to measure the subject's eye to be examined. A measurement unit, and a second measurement unit that is set at a second set working distance shorter than the first set working distance to measure the eye to be examined, and is integrally provided above the first measuring unit; An apparatus main body provided with the first measurement unit and the second measurement unit and movable with respect to the base, a drive unit for moving the apparatus main body with respect to the base, and the subject A forehead portion provided in the base to receive the forehead, and a control unit for controlling the first measurement unit, the second measurement unit, and the drive unit, wherein the control unit includes the second In the apparatus main body, the first interval is between the measurement unit and the forehead portion. It is possible to detect a front position and a second front position in the apparatus main body that has a second interval larger than the first interval between the second measurement unit and the forehead portion, and the control When the device main body portion moves to the forehead portion side, the unit issues a warning when the device main body portion reaches the second front position, and when the device main body portion reaches the first front position, Any ophthalmic apparatus that stops the movement of the apparatus main body toward the forehead portion may be used, and the present invention is not limited to the above-described embodiment.

  Further, in the above-described embodiment, the control unit 33 determines the height position of the apparatus main body 13 based on the presence / absence of a signal from the height position detection unit 48, and the type of the signal from the front position detection unit 49 and its signal The position in the Z-axis direction of the apparatus main body 13 (nozzle protrusion 21h (airflow blowing nozzle 21b)) is determined based on the presence or absence. However, the control unit 33 has a height position (whether it is the first height position H1 or the second height position H2) of the apparatus main body 13 (nozzle projection 21h (airflow spray nozzle 21b)), and It is possible to determine which one of the front positions (first front position FL1, second front position FL2, third front position FL3, fourth front position FL4) in the Z-axis direction is. As long as it is, it is not limited to the above-described embodiment. An example as another method will be described below. When the drive sources in the Y-axis drive portion 12a, Z-axis drive portion 12b, and X-axis drive portion 12c of the drive unit 12 are controlled using the number of pulses of the pulse motor, the control unit 33 By counting the number of pulses from each reference position in the direction and storing the counted number, the position in each direction of XYZ can be determined and stored. By using this function, the control unit 33 stores the height position HL and each of the front positions (FL1 to FL4) together, thereby moving the apparatus main body 13 (nozzle projection 21h (airflow spraying) It can be determined in which position the nozzle 21b)) is located.

  Furthermore, in the above-described embodiment, the control unit 33 acquires a signal indicating that the second front position FL2 has been reached from the front position detection unit 49, so that the apparatus main body 13 has reached the second front position FL2. Detecting that. However, the control unit 33 detects a position of the eye E in the Z-axis direction (direction toward the eye E) in the tonometry part 20 as the second measurement unit (Z alignment index projection). The optical system 25, the Z alignment detection optical system 26, and the Z alignment detection correction unit 32 (see FIG. 2)) may be used. The determination of whether or not the second front position FL2 has arrived is made at the first height position H1 at which the apparatus main body 13 can cause the nozzle projection 21h (airflow blowing nozzle 21b) and the forehead portion 16 to interfere with each other. This is because the forehead portion 16 is positioned on the optical axis O1 of the intraocular pressure measurement unit 20.

  In the detection optical system, the Z alignment light source 25 a of the Z alignment index projection optical system 25 is turned on to project a parallel light beam for alignment in the Z-axis direction onto the optical axis of the Z alignment index projection optical system 25. When the cornea Ec of the eye E is present on the optical axis of the Z alignment index projection optical system 25, a parallel light beam for alignment in the Z-axis direction is projected onto the cornea Ec and reflected by the cornea Ec. Is received by the sensor 26c of the Z alignment detection optical system 26. For this reason, the detection optical system cannot output a detection signal when the cornea Ec of the eye E is not present on the optical axis, and is detected when the cornea Ec of the eye E is present on the optical axis. The eye E (cornea Ec) is located in a range where a signal can be output and detected. With this configuration, in the detection optical system, when the forehead holding portion 16 is positioned on the optical axis O1 of the intraocular pressure measurement portion 20, the alignment index light described above is applied when the hand H is placed there. The reflected light beam reflected by the hand H is acquired by the sensor 26c (see FIG. 10A), and the alignment index light is reflected by the forehead portion 16 when the hand H is not placed. The reflected light flux is acquired by the sensor 26c (see FIG. 10B).

  Here, since the cornea Ec is close to a mirror surface, if the cornea Ec exists on the optical axis of the Z alignment index projection optical system 25, a slit-like image is formed on the sensor 26c. On the other hand, the hand H (the forehead holding portion 16) scatters and reflects the parallel light beam from the Z alignment index projection optical system 25, not in a state close to a mirror surface. For this reason, if the hand H (forehead portion 16) exists on the optical axis of the Z alignment index projection optical system 25, an image of the hand H (forehead portion 16) (part thereof) is formed on the sensor 26c. Nonetheless, the sensor 26c receives the scattered light and becomes brighter as a whole. In this detection optical system (the sensor 26c), the closer the hand H (the forehead portion 16) is to the intraocular pressure measurement unit 20 as viewed in the direction of the optical axis O1, the brighter the light received. In the detection optical system, when there is nothing on the optical axis of the Z alignment index projection optical system 25, there is no amount of reflected light, so that it can be easily determined.

  Here, the forehead holding portion 16 is present at a predetermined position when viewed in the direction of the optical axis O1, and its reflectance is also known. Therefore, the detection optical system (Z alignment detection optical system 26 ( The amount of reflected light received by the sensor 26c)) is determined in advance. Further, the hand H hung on the forehead holder 16 is closer to the intraocular pressure measurement unit 20 than the forehead holder 16 as viewed in the direction of the optical axis O1, so that the amount of light reflected from the forehead holder 16 is compared. Thus, the amount of reflected light received by the detection optical system increases. For this reason, in the detection optical system, a detection threshold value is set in consideration of both reflected light amounts, and when the reflected light amount exceeds the detection threshold value, it is detected that the hand H exists between the forehead portion 16. can do. Then, the detection threshold value is set to a value corresponding to the amount of reflected light from the hand H existing at a position before being sandwiched between the forehead portion 16 by the nozzle projection 21h (airflow spray nozzle 21b) of the tonometry part 20. By doing so, it is possible to detect that the apparatus main body 13 (nozzle protrusion 21h) has reached the second front position FL2 because the amount of reflected light exceeds the detection threshold. Note that the second front position FL2 in this case is prevented from being sandwiched between the above-described embodiment and the forehead holding portion 16 by the nozzle projection 21h (airflow blowing nozzle 21b) of the intraocular pressure measurement unit 20. Are the same, but not necessarily equal to the second interval i2.

  From this, the control unit 33 uses the detection optical system to detect that the amount of reflected light exceeds the detection threshold, so that the apparatus main body unit 13 has reached the second front position FL2 and the forehead unit 16 Both the hand H can be detected at a time. For this reason, when it is detected that the amount of reflected light exceeds the detection threshold value, that is, when the apparatus main body 13 has reached the second front position FL2, it is possible to improve usability by issuing a warning. it can. Moreover, since the Z alignment detection optical system 26 provided for the measurement by the tonometry part 20 is used, it can be a simple configuration and can be easily applied to an existing apparatus. it can.

  Note that, as described above, the detection optical system in the intraocular pressure measurement unit 20 as the second measurement unit is used, and the difference between the reflected light amount from the forehead holding unit 16 and the reflected light amount from the hand H is clear. If appropriate detection is difficult, the reflectance of the face of the forehead portion 16 facing the nozzle protrusion 21h (airflow spray nozzle 21b) with respect to the alignment index light is different from the reflectance of the hand H with respect to the alignment index light. It should be. As an example of this, the reflectance of the surface of the forehead portion 16 facing the nozzle protrusion 21h (airflow spray nozzle 21b) is extremely low. With this configuration, when nothing is present on the optical axis of the Z alignment index projection optical system 25 and when the forehead portion 16 is present on the optical axis, the amount of reflected light received by the detection optical system Therefore, it is possible to reliably prevent the detection threshold set as described above from being exceeded. For this reason, by detecting that the amount of reflected light received by the detection optical system has exceeded the detection threshold, the apparatus main body 13 approaches the hand H hung on the forehead holding unit 16, thereby causing the apparatus main body 13 to move. The arrival at the second front position FL2 can be reliably detected. Another example in which the reflectance is different is to increase the reflectance of the surface of the forehead portion 16 that faces the nozzle protrusion 21h (airflow spray nozzle 21b). With such a configuration, it can be determined that the hand H is not placed on the forehead portion 16 when the amount of reflected light is large, and the hand H is placed when the amount of reflected light is small. The reflectance can be easily set by painting the corresponding part or sticking a sticker on the part.

  In the above-described embodiment, the control unit 33 detects that the apparatus main body unit 13 has reached the second front position FL2 by obtaining a signal from the front position detection unit 49 that the second front position FL2 has been reached. doing. However, the control unit 33 may use the anterior ocular segment observation optical system 21 of the intraocular pressure measurement unit 20 as the second measurement unit. The determination of whether or not the second front position FL2 has reached is the first height position H1 at which the apparatus main body 13 can interfere with the nozzle projection 21h (airflow spray nozzle 21b) and the forehead portion 16. This is because the forehead portion 16 is positioned on the optical axis O1 of the intraocular pressure measurement unit 20. In this case, the control unit 33 analyzes the image (its data) acquired by the anterior ocular segment observation optical system 21 (its CCD camera 21i) of the intraocular pressure measurement unit 20 as the second measurement unit, thereby obtaining a forehead portion. 16 can determine whether the hand H is hung or the hand H is not hung. If it is determined that the hand H is hung on the forehead holding part 16, the hand H hung on the forehead holding part 16 is moved by the nozzle projection 21h (airflow spray nozzle 21b) of the intraocular pressure measurement part 20 When it is determined that the device main body 13 is located at a position before being sandwiched between the device main body 13 and the device 16, it is detected that the device main body portion 13 has reached the second front position FL <b> 2. Such a determination can be made, for example, by analyzing the size of the forehead portion 16 on the image (its data). As a result, it is possible to detect both that the apparatus main body 13 has reached the second front position FL2 and that the forehead holding part 16 is put on the hand H at a time. Usability can be further improved by issuing a warning when it is detected that the second front position FL2 has been reached. In addition, since the anterior ocular segment observation optical system 21 provided for measurement by the intraocular pressure measurement unit 20 is used, the configuration can be simplified and the present invention can be easily applied to existing devices. Can do. The configuration using the anterior ocular segment observation optical system 21 can be used in combination with the configuration using the detection optical system of the intraocular pressure measurement unit 20. In this case, on the other hand, when it is detected that the hand H is put on the forehead holding portion 16 and the apparatus main body portion 13 has reached the second front position FL2, a warning may be issued.

  In the above-described embodiment, the intraocular pressure measurement unit 20 is mounted as the second measurement unit. However, if the second setting working distance d2 is set to a value smaller than the first setting working distance d1, the optical pressure measurement unit 20 is optical. It may be an intraocular pressure measuring unit having a different configuration, arrangement of optical members, and measurement principle, or may be a pachymeter that measures the thickness of the cornea (corneal thickness measurement), and is limited to the above-described embodiments. is not.

  In the above-described embodiment, the eye characteristic measurement unit 40 is mounted as the first measurement unit. However, if the reflected light from the eye E is received and the optical characteristic of the eye E is measured, the optical characteristic is measured. The configuration, the arrangement of each optical member, and the measurement principle may be different, the content (type) of measurement may be different, and the present invention is not limited to the above-described embodiments.

  As described above, the ophthalmologic apparatus of the present invention has been described based on the embodiments. However, the specific configuration is not limited to the embodiments, and design changes and additions are allowed without departing from the gist of the present invention. The

DESCRIPTION OF SYMBOLS 10 Ophthalmologic apparatus 11 Base 12 Drive part 13 Apparatus main body part 16 Forehead part 20 (As an example of a measurement part) Tonometry part 21 (As an example of an observation optical system) Anterior eye part observation optical system 25 (Detection optical system) Z alignment index projection optical system 26 (as an example) Z alignment detection optical system 33 (as an example of a detection optical system) 33 Control unit 49 Front position detection unit d1 First set working distance d2 Second set working distance E Eye to be examined FL1 First forward position FL2 Second forward position i1 First interval i2 Second interval H Hand

Claims (5)

A measuring unit for measuring the subject's eye;
An apparatus main body provided with the measurement unit and movable with respect to the base;
A drive unit that moves the apparatus main body with respect to the base;
A forehead portion provided in the base to receive the subject's forehead;
A control unit for controlling the measurement unit and the drive unit,
In the control unit, a first front position in the apparatus main body unit having a first interval between the measurement unit and the forehead portion, and a gap between the measurement unit and the forehead unit from the first interval. And a second front position in the apparatus main body that is a large second interval can be detected,
The controller issues a warning when the device main body reaches the second front position when moving the device main body toward the forehead portion, and the device main body reaches the first front position. Then, the movement of the device main body to the forehead portion side is stopped ,
The measurement unit has a detection optical system capable of detecting the position of the eye to be examined in a direction toward the eye to be examined;
Wherein, by determining that the hand is closer to the detecting optical system, an ophthalmologic apparatus the apparatus body is characterized that you detect the arrival to the second forward position. The detection optical system is capable of acquiring an image of the eye to be examined;
Prior Symbol controller, by analyzing the image acquired by the detection optical system, ophthalmic according to claim 1, wherein the apparatus body is characterized that you detect the arrival to the second forward position apparatus. The detection optical system is capable of detecting the position of the subject eye in a direction toward the subject eye by receiving reflected light;
The control unit determines that the device main body has reached the second front position by determining that a hand hung on the forehead portion is approaching based on the amount of reflected light in the detection optical system. detection be ophthalmologic apparatus according to claim 1, characterized in Rukoto. The detection optical system is capable of detecting the position of the subject eye in a direction toward the subject eye by receiving reflected light ;
In the forehead portion, the reflectance of the surface facing the measurement portion is set lower than the reflectance of the hand,
When the amount of reflected light received by the detection optical system exceeds a detection threshold set to detect that a hand is approaching , the control unit has reached the second front position. The ophthalmologic apparatus according to claim 1, wherein The measuring unit, the ophthalmologic apparatus according to any one of claims 1, characterized that you have been the projection shape protruding toward the subject's eye side to claim 4.