WO2015040950A1

WO2015040950A1 - Ocular refractive power measuring apparatus and optometry apparatus

Info

Publication number: WO2015040950A1
Application number: PCT/JP2014/069187
Authority: WO
Inventors: 睦隆石原
Original assignee: 株式会社トプコン
Priority date: 2013-09-18
Filing date: 2014-07-18
Publication date: 2015-03-26
Also published as: JP2017127648A; JP6277295B2; JPWO2015040950A1; JP6351606B2

Abstract

The purpose of the present invention is to provide an apparatus for measuring ocular refractive power, whereby a subjective measurement using an Amsler chart can be easily and appropriately performed. An ocular refractive power measuring apparatus (10) provided with a reflex measurement projection optical system (33) for projecting a measurement light on a main optical axis (O1) toward a fundus (Ef) of a subject eye (E), and a reflex measurement light-receiving optical system (34) for receiving light reflected by the fundus (Ef) from the measurement light traveling along the main optical axis (O1), the ocular refractive power measuring apparatus (10) measuring the ocular refractive power of the subject eye (E) on the basis of the light received by the reflex measurement light-receiving optical system (34). A visual target presentation optical system (31) is provided for presenting, to the subject eye (E) on the main optical axis (O1), an Amsler chart (31v) comprising a grid-shaped pattern as a subjective visual target to be gazed at by a subject to perform a subjective measurement.

Description

Eye refractive power measurement device, optometry device

The present invention relates to an eye refractive power measuring apparatus and an optometric apparatus for measuring the eye refractive power of an eye to be examined.

As a general ophthalmic examination or eye refraction examination, it is known to measure the eye refractive power of an eye to be examined using an eye refractive power measuring apparatus (optometry apparatus). As the ophthalmic examination and eye refraction examination, there is one that confirms the possibility of a disease including the center of the retina (macular region) such as macular degeneration or the surrounding disease, and the Amsler chart is used as the method. It is known (see, for example, Patent Document 1). This Amsler chart is a grid pattern, and it makes the subject gaze at the center position and performs what is called a subjective measurement to make the subject check how the grid pattern looks. It is. In subjective measurement using an Amsler chart, if the lattice pattern appears distorted, partially missing, or partially blurred, the center of the retina (the macula) ) Or any of the surrounding diseases.

Japanese Patent Laid-Open No. 2003-265412

By the way, when performing the above-described subjective measurement, the Amsler chart is in a state where the subject eye (subject) is directly opposed at a predetermined distance (for example, 30 to 40 cm) from the subject eye. It is necessary to make the subject gaze at the center position while completely covering the other eye of the person. The Amsler chart is formed of paper, an electronic medium, or the like. For this reason, in the Amsler chart, it is not easy to perform the above-described subjective measurement in a state presented to the subject eye while making the distance from the subject eye and the posture with respect to the subject eye appropriate, and the subjective measurement cannot be performed appropriately. There is a fear. Further, in the Amsler chart, it is necessary to completely cover the other eye of the subject, which may hinder gaze depending on the subject, and there is a possibility that the above-described subjective measurement cannot be appropriately performed. For these reasons, there is room for improvement in performing the above-described awareness measurement using the Amsler chart.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an eye refractive power measurement apparatus (optometry apparatus) capable of easily and appropriately performing subjective measurement using an Amsler chart. .

In order to solve the above-described problem, an eye refractive power measurement apparatus according to claim 1 includes a reflex measurement projection optical system that projects measurement light on the main optical axis toward the fundus of the subject's eye, and the main optical axis. A reflex measurement light receiving optical system that receives reflected light from the fundus of the measurement light passing through the eye, and the eye refractive power that measures the eye refractive power of the eye based on the light received by the reflex measurement light reception optical system A measuring apparatus, comprising: an optotype presenting optical system for presenting an Amsler chart made of a lattice pattern as a subjective target to be watched by a subject for subjective measurement on the subject's eye on the main optical axis It is characterized by that.

The eye refractive power measuring device according to claim 2 is the eye refractive power measuring device according to claim 1, wherein the target presentation optical system has a predetermined size and a predetermined size from the eye to be examined. It is characterized in that it is presented to the eye to be examined in a state equal to that provided at a distance position.

The eye refractive power measurement device according to claim 3 is the eye refractive power measurement device according to

claim

1 or 2, wherein the target presentation optical system is based on light reception by the reflex measurement light receiving optical system. In accordance with the measured eye refractive power of the eye, the Amsler chart is moved to a position that is suitable when looking far away in the eye or a position that is suitable when looking near. And

The eye refractive power measurement device according to claim 4 is the eye refractive power measurement device according to any one of claims 1 to 3, wherein the optotype presenting optical system is a center of a retina in the eye to be examined. The Amsler chart is presented to the eye to be examined within a range corresponding to.

The eye refractive power measuring device according to claim 5 is the eye refractive power measuring device according to any one of claims 1 to 4, wherein a central gazing point is provided at a central position in the Amsler chart. And a plurality of peripheral gazing points are provided around the central gazing point.

The eye refractive power measurement apparatus according to claim 6 is the eye refractive power measurement apparatus according to claim 5, wherein each of the peripheral gazing points is the Amsler chart presented by the target presentation optical system. It is provided in the peripheral part of the visual field from the eye to be examined.

The eye refractive power measuring device according to claim 7 is the eye refractive power measuring device according to

claim

5 or 6, wherein the Amsler chart has a square shape, and the peripheral gaze point is the Amsler chart. , And provided at respective center positions in four divided areas when divided into four by a vertical line and a horizontal line including the central gazing point.

The eye refractive power measurement device according to claim 8 is the eye refractive power measurement device according to any one of claims 1 to 7, wherein the optotype presenting optical system has a lattice shape in the Amsler chart. A line segment for drawing a pattern is presented to the eye to be examined as a predetermined color.

The eye refractive power measurement device according to claim 9 is the eye refractive power measurement device according to any one of claims 1 to 8, wherein the visual target presenting optical system includes a visual target light source, The Amsler chart is formed of a member that transmits light emitted from the target light source in the target presentation optical system.

The eye refractive power measuring apparatus according to claim 10 is the eye refractive power measuring apparatus according to claim 9, wherein the target presentation optical system has another target different from the Amsler chart, and the Amsler The chart and the other target are switched and positioned on the optical axis along which the light emitted from the target light source travels.

The eye refractive power measurement device according to claim 11 is the eye refractive power measurement device according to any one of claims 1 to 8, wherein the Amsler chart is an image forming device in the target presentation optical system. It is characterized by being displayed on the display screen.

The eye refractive power measurement device according to claim 12 is the eye refractive power measurement device according to any one of claims 1 to 11, further comprising an eye on the main optical axis toward the eye to be examined. An eye characteristic measurement projection optical system for projecting other measurement light for measuring other optical characteristics of the subject eye different from refractive power, and the other measurement light passing through the main optical axis from the subject eye. And an eye characteristic measurement light receiving optical system for receiving reflected light.

The optometry apparatus according to claim 13 is an optometry apparatus that measures the eye refractive power of the subject's eye, and uses an Amsler chart made of a lattice pattern as a subjective target for the subject to gaze for subjective measurement. It comprises an optotype presenting optical system to be presented in

The optometry apparatus according to claim 14 is the optometry apparatus according to claim 13, wherein the optotype presenting optical system is provided at a position where the Amsler chart has a predetermined size and a predetermined distance from the eye to be examined. It presents to the eye to be examined in a state equal to that obtained.

According to the eye refractive power measuring apparatus of the present invention, the subjective measurement using the Amsler chart can be easily and appropriately performed.

In addition to the above-described configuration, the optotype presenting optical system presents the Amsler chart to the eye to be examined in a state equal to that provided at a position having a predetermined size and a predetermined distance from the eye to be examined. Then, the subjective measurement (Amsler chart test) using the Amsler chart can be performed while presenting the Amsler chart to the eye to be examined in a more appropriate state. Thereby, the said subjective measurement (Amsler chart test) can be performed appropriately, and it can be confirmed whether there is a possibility of a disease appropriately.

In addition to the above-described configuration, the optotype presenting optical system moves the Amsler chart farther away from the subject eye according to the eye refractive power of the subject eye measured based on the light received by the reflex measurement light-receiving optical system. If you move to a position that is suitable for viewing or a position that is suitable for close viewing, the Amsler chart will be displayed on the subject (eye) without using binocular-corrected glasses. Can show. At this time, it is possible to confirm the appearance while showing the Amsler chart in a state close to the correction value of only one eye in the eye to be examined. For this reason, since the subject will be able to see the Amsler chart more clearly and confirm the appearance, the awareness measurement (Amsler chart test) can be performed more appropriately, and the disease can be more appropriately observed. It is possible to confirm whether or not there is a possibility.

In addition to the configuration described above, the optotype presenting optical system gazes at the center position as a fixation target when the Amsler chart is presented to the eye to be examined in a range corresponding to the center of the retina in the eye to be examined. By confirming the appearance of the Amsler chart in the state in which it has been made, it is possible to more appropriately confirm whether or not there is a possibility of a disease in the center (macular region) of the retina (fundus) in the eye to be examined.

In addition to the above-described configuration, in the Amsler chart, it is assumed that a central gazing point is provided at a central position and a plurality of peripheral gazing points are provided around the central gazing point. Even if the Amsler chart that can be shown to the subject's eye (subject) by the system is small, by checking the appearance while gazing at each peripheral gaze point, it can be seen from the actual Amsler chart It is possible to confirm whether or not there is a possibility of a disease in a large range.

In addition to the above-described configuration, each of the peripheral gazing points is provided at a peripheral portion of the visual field from the eye to be examined on the Amsler chart presented by the optotype presenting optical system. Using the Amsler chart in the field of view that can be shown to the (subject), it is possible to confirm whether or not there is a possibility of the disease in the largest range.

In addition to the above-described configuration, the Amsler chart has a square shape, and the peripheral gaze point is divided into four divided areas when the Amsler chart is divided into four by a vertical line and a horizontal line including the central gaze point, respectively. Assuming that it is provided at the center position of each, Amsler is four times as large as the square area defined by each peripheral gaze point by checking each of the four gaze points. It is possible to confirm whether or not there is a possibility of a disease on the chart, and the subjective measurement using the Amsler chart can be performed more efficiently.

In addition to the above-described configuration, when the visual target presenting optical system presents a line segment that draws a lattice-like pattern in the Amsler chart as a predetermined color to the eye to be examined, for example, a reaction (subject) It is possible to determine whether or not there is a possibility of a disease appropriately including these even when the appearance of the image is different.

In addition to the configuration described above, the target presentation optical system includes a target light source, and the Amsler chart is formed of a member that transmits light emitted from the target light source in the target presentation optical system. As a result, the Amsler chart can be presented to the eye to be examined with a simple configuration.

In addition to the configuration described above, the optotype presenting optical system has another optotype different from the Amsler chart, and is emitted from the optotype light source by switching between the Amsler chart and the other optotype. If it is located on the optical axis where light travels, various indices can be presented to the eye to be examined, and usability can be improved.

In addition to the above-described configuration, the Amsler chart can be configured more simply if it is displayed and formed on the display screen of the image forming apparatus in the visual target presenting optical system. Moreover, even if it is a case where the color of an Amsler chart is changed as mentioned above, it can respond easily. Furthermore, since each peripheral gazing point can be provided freely, usability can be further improved.

In addition to the above-described configuration, an eye characteristic measurement for projecting other measurement light for measuring another optical characteristic of the subject eye different from the eye refractive power on the main optical axis toward the subject eye Usability can be further improved by including a projection optical system and an eye characteristic measurement light receiving optical system that receives reflected light from the subject eye of the other measurement light passing through the main optical axis.

An optometry apparatus for measuring an eye refractive power of an eye to be examined, and an optotype presenting optical system for presenting an Amsler chart having a lattice pattern as a subjective target to be observed by a subject for subjective measurement If this is included, the subjective measurement using the Amsler chart can be easily and appropriately performed.

It is explanatory drawing which shows typically the structure of the eye refractive power measuring apparatus 10 of Example 1 as an example of the eye refractive power measuring apparatus (optometry apparatus) which concerns on this invention. 3 is a block diagram illustrating a configuration of a control system of the eye refractive power measurement apparatus 10. FIG. 3 is an explanatory diagram for explaining an optical configuration of the eye refractive power measurement apparatus 10. FIG. It is explanatory drawing for demonstrating the structure of the grid chart 31v (Amsler chart). 4 is an explanatory diagram for explaining a configuration of a kerato ring pattern 37. FIG. FIG. 10 is an explanatory diagram for explaining display contents displayed on the display surface 14a of the display unit 14 in a scene where subjective measurement is performed. It is explanatory drawing which shows typically the visual field Vf from the eye E to be examined on the grid chart 31v (Amsler chart) presented by the target projection optical system 31. It is explanatory drawing for demonstrating that the same judgment as the case where the whole grid chart 31v is shown by making each peripheral gaze point look is shown, (a) gazes the peripheral gaze point D2 within the visual field Vf. (B) shows a state in which the state of (a) is replaced with a state in which the central gazing point D1 is gazed with the grid chart 31v. It is explanatory drawing for demonstrating that the same judgment as the case where the whole grid chart 31v is shown by making each peripheral gaze point look is shown, (a) gazes the peripheral gaze point D3 within the visual field Vf. (B) shows a state in which the state of (a) is replaced with a state in which the central gazing point D1 is gazed with the grid chart 31v. It is explanatory drawing for demonstrating that the same judgment as the case where the whole grid chart 31v is shown by making each peripheral gaze point look is shown, (a) gazes the peripheral gaze point D4 within the visual field Vf. (B) shows a state in which the state of (a) is replaced with a state in which the central gazing point D1 is gazed with the grid chart 31v. It is explanatory drawing for demonstrating that the same judgment as the case where the whole grid chart 31v is shown by making each peripheral gaze point look is shown, (a) gazes the peripheral gaze point D5 within the visual field Vf. (B) shows a state in which the state of (a) is replaced with a state in which the central gazing point D1 is gazed with the grid chart 31v. FIG. 7 is an explanatory view similar to FIG. 7 schematically showing the visual field Vf from the eye E when a grid chart 31v ′ (Amsler chart) as another example is presented by the target projection optical system 31. It is explanatory drawing which shows typically the structure of the subjective optometry apparatus 60 of Example 2 as an example of the optometry apparatus which concerns on this invention. It is explanatory drawing which shows the structure of each rotating disk 73 accommodated in both the phoropters 71 of the subjective optometry apparatus 60. FIG. It is explanatory drawing which shows the structure of the controller 63 of the subjective optometry apparatus 60. FIG. 3 is a block diagram illustrating a configuration of a control system of the subjective optometry apparatus 60. FIG. It is explanatory drawing for demonstrating the display content displayed on the display part 75 (display screen 75b) in a 1st display mode. It is explanatory drawing for demonstrating the display content displayed on the display part 75 (display screen 75b) in a 2nd display mode. It is explanatory drawing which shows a mode that a distance test | inspection is performed by the subjective optometry apparatus. It is explanatory drawing which shows a mode that a near vision test | inspection is performed by the subjective optometry apparatus 60. FIG.

Hereinafter, embodiments of an eye refractive power measuring apparatus (optometry apparatus) according to the present invention will be described with reference to the drawings.

An eye refractive power measuring apparatus 10 as an embodiment 1 of an eye refractive power measuring apparatus (optometry apparatus) according to the present invention will be described with reference to FIGS. The eye refractive power measuring apparatus 10 shown in FIG. 1 basically measures the eye refractive power of the eye E (see FIG. 3 and the like). In Example 1, the eye refractive power measuring apparatus 10 has an objective measurement function for measuring optical characteristics (eye characteristics) including the eye refractive power of the eye E by objective measurement and an eye of the eye E by subjective measurement. And a subjective measurement function for measuring optical characteristics (eye characteristics) including refractive power. For the eye E, FIG. 3 schematically shows a fundus (retina) Ef and a cornea (anterior eye portion) Ec.

This eye refractive power measurement device 10 is configured by a device body 13 being movably provided on a base 11 via a drive unit 12 (see FIG. 2). The device main body 13 is provided with an optical system (see FIG. 3) of an eye refractive power measuring device 10 described later on the inside, and a display unit 14, a chin rest 15 and a forehead support 16 on the outside. ing.

The display unit 14 is formed of a liquid crystal display, and is an image (anterior segment image E ′) of the anterior segment (cornea Ec) of the eye E under the control of a control unit 21 (see FIG. 2) described later. And various operation screens, measurement results, and the like are displayed on the display surface 14a (see FIG. 6). In the first embodiment, the display unit 14 is equipped with a touch panel function, and performs operations for measuring optical characteristics (eye characteristics) including eye refractive power and for photographing the anterior eye part (cornea Ec). It is possible to perform an operation, an operation for moving the apparatus main body 13, an operation for switching between subjective measurement and objective measurement, an operation for switching a target for objective measurement, and the like. Moreover, the display part 14 displays the various symbols (refer FIG. 6) as an icon for each operation mentioned above using the function of a touch panel, and enables operation by touching each said symbol. The operation for performing the measurement may be performed by providing a measurement switch on the periphery of the base 11, the apparatus main body 13 or the display unit 14 and operating the measurement switch. Further, the operation for moving the apparatus main body 13 is performed by providing a control lever or a movement operation switch on the periphery of the base 11, the apparatus main body 13 or the display unit 14, and operating the control lever or the movement operation switch. You may do it.

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 the apparatus main body 13, when the subject's face is fixed by the chin rest 15 and the forehead support 16, the subject's eye E has a keratring pattern 37 (described later) and an objective lens 31 q positioned at the center thereof. (See FIGS. 3 and 5). For this reason, appropriate measurement (objective measurement and subjective measurement) of the eye E to be examined by the optical system of the eye refractive power measuring apparatus 10 becomes possible.

In this eye refractive power measuring 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 in normal use (see FIG. 1). The display unit 14 (the display surface 14a) is on the examiner side, and the chin rest 15 and the forehead support unit 16 are on the subject side. Although the illustration of the display unit 14 is omitted, the display unit 14 is rotatably supported by the apparatus main body unit 13 to change the orientation of the display surface 14a, for example, to direct the display surface 14a toward the subject, The surface 14a can be directed to the side (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 configured such that the apparatus main body 13 with respect to the base 11 in the vertical direction (Y-axis direction) and the front-rear direction (Z-axis direction (display unit 14, chin rest 15 and forehead portion during normal use). 16) and a horizontal direction (X-axis direction) perpendicular to them. In Example 1, the upper side in the vertical direction is the positive side in the Y-axis direction, the subject side in the front-rear direction (the left back side when viewed from the front in FIG. 1) is the positive side in the Z-axis direction, 1 in front view, the left front side is the positive side in the X-axis direction (see arrow in FIG. 1). In the first embodiment, as shown in FIG. 2, the drive unit 12 includes an X motor 12a, a Y motor 12b, and a Z motor 12c, and an X driver 12d, a Y driver 12e, and a Z driver 12f for driving each of them. And have.

The X motor 12 a moves (displaces) the apparatus main body 13 in the X axis direction (left and right direction) with respect to the base 11. In other words, the X motor 12a is configured to move the apparatus main body 13 in the X-axis direction (left-right direction) in the drive unit 12. The X motor 12a is appropriately driven when the control unit 21 controls the X driver 12d.

The Y motor 12b moves (displaces) the device main body 13 in the Y axis direction (vertical direction) with respect to the base 11. In other words, the Y motor 12b is a location for moving the apparatus main body 13 in the Y-axis direction (vertical direction) in the drive unit 12. The Y motor 12b is appropriately driven by controlling the Y driver 12e by the control unit 21.

The Z motor 12c moves (displaces) the apparatus main body 13 in the Z-axis direction (front-rear direction) with respect to the base 11. In other words, the Z motor 12 c 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 motor 12c is appropriately driven when the control unit 21 controls the Z driver 12f.

For this reason, the drive unit 12 appropriately drives the X motor 12a, the Y motor 12b, and the Z motor 12c to move the apparatus main body unit 13 in the vertical direction (Y-axis direction) and the front-rear direction (Z-axis direction). Direction) and right and left direction (X-axis direction). In other words, the control unit 21 appropriately controls the drive unit 12, that is, appropriately drives the X motor 12a, the Y motor 12b, and the Z motor 12c via the X driver 12d, the Y driver 12e, and the Z driver 12f. Thus, the apparatus main body 13 can be appropriately moved relative to the chin rest 15 and the forehead support 16 fixed to the base 11.

The control unit 21 constitutes an electric control system in the eye refractive power measuring apparatus 10 and controls the respective units of the eye refractive power measuring apparatus 10 in a centralized manner by a program stored in a built-in storage unit 21a. As will be described later, the control unit 21 appropriately drives and controls the drive unit 12 based on the detection result (the signal) from the focus determination circuit 22 and the detection result (the signal) from the alignment determination circuit 23. 11 is adjusted. Moreover, the control part 21 displays the image on the display part 14 (the display surface 14a) based on the image which the image sensor 32g of the anterior ocular segment observation optical system 32 (refer FIG. 3) mentioned later acquires. Further, the control unit 21 includes a target light source 31a, a glare light source 31w, an anterior ocular segment illumination light source 32a, a reflex measurement light source 33a, an XY direction detection light source 35a, a kerato-ring-shaped index projection light source 36, and a Z direction detection. The light source 38a is connected via a driver (drive mechanism) for performing lighting control corresponding to each light source 38a, and the light emission of each of these light sources is appropriately controlled.

Next, the control unit 21 is connected to a switching drive unit 31s of an index switching unit 31d (see FIG. 3), which will be described later, and the visual target held in the turret unit 31r (see FIG. 3) of the index switching unit 31d. The switching drive unit 31s is controlled to be switched. In addition, the control unit 21 drives and controls the target focusing mechanism 31D to appropriately move a focusing lens 31h (see FIG. 3) to be described later, and moves the index to appropriately move the index unit 33U (see FIG. 3). The mechanism 33D is driven and controlled, and the index focusing mechanism 34D is driven and controlled to appropriately move the focusing lens 34e (see FIG. 3). Further, the control unit 21 drives and controls a drive unit (not shown) in order to adjust the relative posture and the integral posture of a pair of lenses in a VCC lens 31k (see FIG. 3) described later. Further, the control unit 21 drives and controls the shutter 32c so that a shutter 32c (see FIG. 3) described later is switched between an open state and a closed state.

Next, the configuration of the control system of the eye refractive power measuring apparatus 10 will be described with reference to FIG. As shown in FIG. 2, the eye refractive power measurement apparatus 10 includes a focus determination circuit 22 and an alignment determination circuit 23 in addition to the control unit 21 described above. An imaging device 32g is connected to the control unit 21, and a signal based on light reception of the imaging device 32g, that is, an anterior eye image E ′ (see FIG. 6) of the eye E to be examined, or eye refractive power measurement described later. (Ref measurement) ring-shaped index image (its image), kerato-ring-shaped index image (its image), XY alignment index light bright spot image (its image), Z direction detection bright spot image (its image) As a signal is transmitted. And the control part 21 is connected to the display part 14, produces | generates an image signal suitably based on the light reception signal from the image pick-up element 32g, and displays the image based on the light reception signal from the image pick-up element 32g on the display part 14 (its display). Displayed appropriately on the surface 14a) (see FIG. 6 etc.). The control unit 21 is connected to the shutter 32c and drives and controls the shutter 32c as described above. The control unit 21 is connected to the drive unit 12 (the X driver 12d, the Y driver 12e, and the Z driver 12f), and appropriately controls the drive unit 12 as described above to control the base body 11 with respect to the apparatus main body unit. 13 is moved appropriately. The control unit 21 appropriately executes each operation described above based on an operation on the display unit 14 or according to a program stored in the storage unit 21a.

Based on the detection signal from the image sensor 32g, the focusing determination circuit 22 causes the optical configuration (device main body 13) of the eye refractive power measurement device 10 to be described later to the fundus oculi Ef (see FIG. 3) of the eye E to be examined. It is detected whether or not it is in focus, that is, whether or not the amount of deviation in the front-rear direction (Z-axis direction) is within an allowable range. In this focus determination circuit 22, for determining the focus (deviation amount), a keratling index image (its image) formed by a later-described keratling index projection light source 36 acquired by the image sensor 32g, and a later-described The Z direction detection bright point mark (image thereof) formed by the Z direction detection parallel projection system 38 is used. Then, the focus determination circuit 22 outputs the detection result (the signal) to the control unit 21. Then, the control unit 21 moves the apparatus main body 13 in the Z-axis direction (front-rear direction) with respect to the base 11 based on the detection result (the signal) from the focus determination circuit 22, and the focus determination circuit 22. The Z alignment can be automatically performed by performing the movement until the signal indicating the completion of focusing (indicating that the amount of deviation is within the allowable range) is received.

Based on the detection signal from the image sensor 32g, the alignment determination circuit 23 determines the relationship between the main optical axis O1 of the optical configuration (apparatus main body 13) of the eye refractive power measuring apparatus 10 described later and the optical axis of the eye E to be examined. This is to detect whether or not the amount of deviation in the XY direction is within an allowable range. The amount of deviation can be represented by, for example, the amount of deviation in the left-right direction (X-axis direction) and its direction, and the amount of deviation in the up-down direction (Y-axis direction) and its direction. This alignment determination circuit 23 uses a signal of an XY alignment index image (bright spot image) (its image) formed by an XY alignment light projection optical system 35 (described later) acquired by the image pickup device 32g to determine the shift amount. Then, the alignment determination circuit 23 outputs the detection result (the signal) to the control unit 21. Then, the control unit 21 moves the apparatus main body 13 in the X-axis direction (left-right direction) and the Y-axis direction (up-down direction) with respect to the base 11 based on the detection result (the signal) from the alignment determination circuit 23. XY alignment can be automatically performed by performing the movement until a signal indicating that the amount of deviation is within the allowable range is received from the alignment determination circuit 23.

As described above, the apparatus main body 13 is provided with the configuration of the optical system in the eye refractive power measuring apparatus 10 inside the housing 13a that forms the outer shape. The eye refractive power measuring apparatus 10 is capable of measuring the optical characteristics (eye characteristics) of the eye E. In Example 1, the eye refractive power (spherical power, astigmatism power, astigmatism) of the eye E is measured. Axial angle etc.) and the shape of the cornea Ec of the eye E to be examined can be measured. The eye refractive power measuring apparatus 10 can measure the eye refractive power of the eye E and the shape of the cornea Ec by objective measurement (objective measurement function), and can also measure the eye refractive power of the eye E. It is possible to measure by awareness measurement (awareness measurement function). The subjective measurement is based on what the subject himself / herself felt by asking the subject how he / she looks, etc., and the objective measurement is based on what the subject felt It is to measure without. And in the eye refractive power measuring apparatus 10, the above-described measurement is made possible by the configuration of the optical system in the apparatus main body 13 (the housing 13a).

Next, the optical configuration of the eye refractive power measurement apparatus 10 will be described with reference to FIG. As shown in FIG. 3, the eye refractive power measuring apparatus 10 includes a target projection optical system 31, an anterior ocular segment observation optical system 32, a reflex measurement projection optical system 33, a reflex measurement light receiving optical system 34, and an XY alignment light projection optical system. 35.

The target projection optical system 31 projects a target (fixed target) for fixation on the fundus oculi Ef of the subject eye E in order to fixate and cloud the subject eye E. Further, the target projection optical system 31 projects a target (a subjective target) for gazing at the subject on the fundus oculi Ef of the eye E in order to ask the subject how to look in order to perform subjective measurement. To do. The anterior ocular segment observation optical system 32 observes the anterior ocular segment (cornea Ec) of the eye E to be examined. In order to measure the eye refractive power of the eye E, the reflex measurement projection optical system 33 uses a pattern light beam (measurement light) as a ring-shaped index for eye refractive power measurement (ref measurement) and a fundus oculi Ef of the eye E to be examined. Project to. The reflex measurement light receiving optical system 34 causes the imaging element 32g to receive the eye refractive power measurement (reflective measurement) ring index reflected from the fundus oculi Ef of the eye E. The reflex measurement projection optical system 33 and the reflex measurement light receiving optical system 34 together with the anterior ocular segment observation optical system 32 and the later-described keratring-shaped index projection light source 36 constitute a corneal shape / eye refractive power measurement optical system. The XY alignment light projection optical system 35 projects the index light toward the eye E to detect the alignment state in the XY direction.

The target projection optical system 31 includes a target light source 31a, a color correction filter 31b, a collimator lens 31c, an index switching unit 31d, a half mirror 31e, a relay lens 31f, a mirror 31g, a focusing lens 31h, and a relay on the optical axis O2. A lens 31i, a field lens 31j, a variable cross cylinder lens 31k (hereinafter also referred to as a VCC lens 31k), a mirror 31m, a dichroic filter 31n, a dichroic filter 31p, and an objective lens 31q.

The index switching unit 31d switches the target to be projected onto the fundus oculi Ef of the eye E to be examined (presented on the eye E) by the target projection optical system 31, and in the first embodiment, the turret unit 31r and the switching drive unit. 31s. The turret portion 31r is provided so as to be rotatable about a rotation shaft 31t, and supports a plurality of targets when viewed in the rotation direction. And the turret part 31r can position any one of a plurality of supported targets on the optical axis O2 by rotating around the rotation axis 31t. The switching drive unit 31s is driven under the control of the control unit 21 (see FIG. 2), thereby rotating the turret unit 31r via the rotation shaft 31t and changing the rotation posture of the turret unit 31r. For this reason, in the index switching unit 31d, under the control of the control unit 21, any one of a plurality of targets supported by the turret unit 31r is positioned on the optical axis O2. In the first embodiment, each target is transmitted through the light (light beam) emitted from the target light source 31a and corrected by the color correction filter 31b, so that the eye E of the eye E to be examined by the target projection optical system 31 to be described later is transmitted. Presentation to the fundus oculi Ef is possible.

In the first embodiment, the turret unit 31r is a landscape chart 31u as a target for fixation (fixation target) and a target (a subjective target) for causing the subject to gaze for subjective measurement. The grid chart 31v is supported. The landscape chart 31u is a visual target (fixed visual target) for causing the subject to gaze for fixation, and indicates a landscape including a portion that is easy to gaze.

In addition, the grid chart 31v is a so-called Amsler chart having a grid pattern as shown in FIG. 4, and is a grid as a subjective measurement that allows the subject to check how the grid pattern looks. A chart test (Amsler chart test) is performed. In the first embodiment, the grid chart 31v (Amsler chart) transmits light (light flux) emitted from the target light source 31a and corrected by the color correction filter 31b at a lattice pattern. In addition, the lattice-shaped pattern portions are bright and the other portions are dark. In addition, the grid chart 31v (Amsler chart) transmits the light described above at a place other than the lattice-like pattern so that the place of the lattice-like pattern is dark and the other places are bright. It may be.

In the first embodiment, the grid chart 31v is configured by arranging 20 grids (squares) in the vertical and horizontal directions. In the grid chart 31v of the first embodiment, one central gazing point D1 is provided at the center position, and four peripheral gazing points (D2 to D5) are provided so as to surround the central gazing point D1. The four peripheral gazing points are provided at positions shifted by five grids (5 squares) in the vertical and horizontal directions from the central gazing point D1 (center position). The upper right one is the peripheral gazing point D3, the lower left one is the peripheral gazing point D4, and the lower right one is the peripheral gazing point D5. That is, when the grid chart 31v is divided into four peripheral gaze points (D2 to D5) by the vertical and horizontal lines including the central gaze point D1 (center position), the peripheral gaze point D2 is located at the center position of the upper left divided area. , The peripheral gazing point D3 is located at the center position of the upper right divided area, the peripheral gazing point D4 is located at the center position of the lower left divided area, and the peripheral gazing point D5 is located at the center position of the lower right divided area. positioned. In the subjective measurement using the grid chart 31v (Amsler chart test), that is, the grid chart test (Amsler chart test), the lattice-like pattern looks distorted, partially missing, or partially blurred. If it is determined that there is a possibility of a disease including the center (macular region) of the retina (fundus) Ef in the eye E to be watched or a surrounding disease.

In addition, although not shown, the turret unit 31r supports a VA (Visual Accuracy) chart as a visual target (a subjective visual target) for making the subject gaze for the subjective measurement. The VA chart is a subjective optotype for performing visual acuity tests by asking the subject how to look (subjective measurement), and letters such as alphabets and hiragana, etc. that have a prescribed size for each visual acuity, Rings etc. are written.

Furthermore, although not shown, the turret unit 31r includes a polarization red green (R & D) test chart, a precision stereoscopic test chart, a stereoscopic test chart, a cross oblique test chart, an unequal image test chart, It is possible to support one or more of the rotating oblique test charts and the like. In the first embodiment, the landscape chart 31u indicating the landscape is used as the fixation target. However, the target chart may be any target that allows the subject to gaze for fixation, and is limited to the configuration of the first embodiment. Is not to be done.

As shown in FIG. 3, the target light source 31a is a light source for projecting a target supported by the turret unit 31r and positioned on the optical axis O2 onto the eye E. In Example 1, the target light source 31a is a white light source. LEDs are used. The focusing lens 31h is movable along the optical axis O2 of the target projection optical system 31 by the target focusing mechanism 31D so as to fixate and cloud the eye E. The target focusing mechanism 31D is driven under the control of the control unit 21 (see FIG. 2) to move the focusing lens 31h to an arbitrary position on the optical axis O2. In the VCC lens 31k, a pair of lenses can rotate independently, and both lenses rotate in opposite directions to change the astigmatism power, and both lenses are integrated in the same direction. Astigmatism axis angle is changed by being rotated. The VCC lens 31k is driven by a drive unit (not shown) under the control of the control unit 21 (see FIG. 2), thereby adjusting the astigmatism power and the astigmatic axis angle in the astigmatism examination. Note that the positions where the dichroic filter 31p and the objective lens 31q are provided are on the main optical axis O1 in the anterior ocular segment observation optical system 32 (optical configuration of the eye refractive power measurement device 10). . For this reason, in the eye refractive power measuring apparatus 10, when performing the measurement, the eye E of the subject whose face is fixed by the chin rest 15 and the forehead holder 16 is positioned on the main optical axis O1. It becomes.

In addition, in the target projection optical system 31, a glare light source 31w is provided on the optical axis O2 ′. The optical axis O2 ′ is obtained by extending the optical axis O2 from the half mirror 31e in the target projection optical system 31 from the half mirror 31e through the relay lens 31f to the mirror 31g. The glare light source 31w is for projecting glare light onto the eye E to which the visual target is presented by the visual target projection optical system 31, and an LED is used in the first embodiment. The glare light source 31w is turned on under the control of the control unit 21 (see FIG. 2) when performing a glare test for determining whether or not the eye E has a cataract. Then, the glare luminous flux emitted from the glare light source 31w passes through the half mirror 31e and travels on the optical axis O2 of the target projection optical system 31, and the eye to be examined is similar to the target luminous flux described later. Proceed to E.

In the target projection optical system 31, white light is emitted from the target light source 31a, and the white light is changed to a desired color by the color correction filter 31b, and then converted into a parallel light beam by the collimator lens 31c. Then, the target light beam) is transmitted through the optical target O2 and the target luminous flux. In the target projection optical system 31, the target light beam is reflected by the half mirror 31e, passed through the relay lens 31f, then reflected by the mirror 31g and advanced to the focusing lens 31h. In the target projection optical system 31, the target light beam passes through the focusing lens 31h, the relay lens 31i, the field lens 31j, and the VCC lens 31k, is reflected by the mirror 31m, passes through the dichroic filter 31n, and passes to the dichroic filter 31p. And proceed. Then, in the target projection optical system 31, the target light flux is reflected by the dichroic filter 31p onto the main optical axis O1 in the anterior ocular segment observation optical system 32, and is advanced to the eye E through the objective lens 31q. Thereby, in the target projection optical system 31, the target positioned on the optical axis O2 by the index switching unit 31d is used as the main in the anterior ocular segment observation optical system 32 (optical configuration of the eye refractive power measurement apparatus 10). It can be presented (projected) to the eye E on the optical axis O1.

At this time, in the target projection optical system 31, when the grid chart 31v (see FIG. 4) is positioned on the optical axis O2 of the target projection optical system 31, the grid chart 31v has a predetermined size and the eye to be examined. The grid chart 31v is presented to the subject eye E in a state equivalent to that provided at a position 30 to 40 cm away from E. Further, in the target projection optical system 31, the size of the grid chart 31v presented to the eye E can be reduced. In this target projection optical system 31, the size of the grid chart 31v to be presented is reduced by detachably providing a mask member on the optical path or on the turret part 31r of the index switching part 31d. A plurality of grid charts 31v having different sizes may be provided in advance in the turret part 31r of the index switching part 31d. For this reason, the optotype projection optical system 31 presents an optotype presenting optical system that presents an Amsler chart (grid chart 31v) composed of a lattice pattern as a subjective target to be gazed at the eye E for subjective measurement. Function as.

The target projection optical system 31 fixes the subject's line of sight by causing the subject to gaze at the target luminous flux as the fixation target projected on the eye E through the landscape chart 31u as the fixation target. . The target projection optical system 31 moves the focusing lens 31h from a state in which the subject is gazing as a fixation target to a position where focus is not achieved, thereby bringing the eye E into a cloudy state. In addition, the target projection optical system 31 causes the subject to pay attention to the target luminous flux as the subjective target projected onto the eye E through the chart (grid chart 31v, etc.) as the subjective target. Performs subjective measurement according to the subjective target. The case where the grid chart 31v is used in the awareness measurement will be described in detail later. When a VA chart is used, a visual acuity test can be performed, and when another chart is used, a test according to the chart can be performed.

The anterior ocular segment observation optical system 32 includes an anterior ocular segment illumination light source 32a, and a half mirror 32b, a shutter 32c, a relay lens 32d, a dichroic filter 32e, an imaging lens 32f, and an image sensor 32g on the main optical axis O1. The objective projection optical system 31, the objective lens 31q, and the dichroic filter 31p are shared. The image pickup device 32g is a two-dimensional solid-state image pickup device, and a CCD (charge coupled device) image sensor is used in the first embodiment.

The anterior ocular segment illumination light source 32a is a light source for illuminating the anterior segment (cornea Ec) of the eye E to be examined. A plurality of anterior ocular segment illumination light sources 32a are provided so as to surround a later-described kerat ring pattern 37 at the end of the apparatus main body 13 on the subject side in the front-rear direction (positive side in the Z-axis direction). (Only two are shown). Each anterior segment illumination light source 32a is lit to directly illuminate the anterior segment (cornea Ec) of the eye E to be examined.

The anterior ocular segment observation optical system 32 illuminates the anterior ocular segment (cornea Ec) of the eye E with the illumination luminous flux emitted from each anterior ocular segment illumination light source 32a, and the illumination luminous flux reflected by the anterior ocular segment. Obtained with the objective lens 31q. At this time, in the anterior ocular segment observation optical system 32, the optical path on the main optical axis O1 is opened with the shutter 32c opened. In the anterior ocular segment observation optical system 32, the reflected illumination light beam passes through the objective lens 31q, passes through the dichroic filter 31p and the half mirror 32b, passes through the relay lens 32d and the dichroic filter 32e, and then forms an image pickup element 32g ( An image is formed on the light receiving surface. The imaging device 32g outputs an image signal based on the acquired image to the control unit 21 (see FIG. 2). The control unit 21 displays an image of the anterior segment (cornea Ec) on the display unit 14 (see FIG. 1) based on the input image signal (see FIG. 6). Therefore, in the anterior ocular segment observation optical system 32, an image of the anterior ocular segment (cornea Ec) can be formed on the image sensor 32g (its light receiving surface), and an image of the anterior ocular segment (the anterior segment) is displayed on the display unit 14. The eye image E ′) can be displayed. When measuring the refractive power after the alignment is completed, the anterior segment illumination light source 32a of the anterior segment observation optical system 32 is turned off, the shutter 32c is closed, and the optical path on the main optical axis O1 is closed. be able to.

The reflex measurement projection optical system 33 includes a reflex measurement light source 33a, a collimator lens 33b, a conical prism 33c, a reflex measurement ring 33d, a relay lens 33e, a pupil ring 33f, a field lens 33g, and a perforated prism 33h on the optical axis O3. It has a rotary prism 33i and shares the target projection optical system 31, the dichroic filter 31n, the dichroic filter 31p, and the objective lens 31q. The reflex measurement light source 33a and the pupil ring 33f are disposed at an optically conjugate position, and the reflex measurement ring 33d and the fundus oculi Ef of the eye E are disposed at an optically conjugate position. The reflex measurement light source 33a, the collimator lens 33b, the conical prism 33c, and the reflex measurement ring 33d constitute an index unit 33U. This index unit 33U is optical axis O3 of the reflex measurement projection optical system 33 by the index movement mechanism 33D. It is possible to move integrally along.

In the reflex measurement projection optical system 33, the light beam emitted from the reflex measurement light source 33a is converted into a parallel light beam by the collimator lens 33b, and proceeds to the reflex measurement ring 33d via the conical prism 33c. The luminous flux passes through a ring-shaped pattern portion formed on the reflex measurement ring 33d and becomes a pattern luminous flux as a ring-shaped index for eye refractive power measurement (reflective measurement). In the reflex measurement projection optical system 33, the pattern light beam travels through the relay lens 33e, the pupil ring 33f, and the field lens 33g to the perforated prism 33h, and is reflected by the reflecting surface of the perforated prism 33h to be a rotary prism. It advances to the dichroic filter 31n through 33i. In the reflex measurement projection optical system 33, the pattern light flux is reflected by the dichroic filter 31n and then by the dichroic filter 31p, so that the anterior ocular segment observation optical system 32 (the optical configuration of the eye refractive power measurement device 10) is reflected. It advances on the main optical axis O1. In the reflex measurement projection optical system 33, the pattern light beam is imaged on the fundus oculi Ef of the eye E by the objective lens 31q. Thereby, the reflex measurement projection optical system 33 measures the eye refractive power (reflective measurement) as the measurement light on the main optical axis O1 in the anterior ocular segment observation optical system 32 (the optical configuration of the eye refractive power measurement apparatus 10). ) The pattern luminous flux of the ring-shaped index can be projected toward the fundus oculi Ef of the eye E to be examined.

The reflex measurement projection optical system 33 is provided with a kerato-ring type index projection light source 36 on the front side of the objective lens 31q. The kerato-ring-shaped index projection light source 36 is set to a predetermined distance from the eye E (cornea Ec) on the kerato-ring (corneal shape measurement ring) pattern 37, and is the main optical axis O1 of the anterior ocular segment observation optical system 32. Concentric with respect to. As shown in FIG. 5, the kerato ring pattern 37 has a plate-like shape as a whole, a center hole 37a centered on the main optical axis O1, and a plurality of slits 37b presenting an annular shape at a concentric position with respect to the main optical axis O1. And a transmission hole 37c paired at the same position from the main optical axis O1. In the kerato ring pattern 37, the center position of the center hole 37a coincides with the main optical axis O1, and the objective lens 31q is exposed from the center hole 37a. The kerato-ring index projection light source 36 is provided corresponding to the slit 37b of the kerat ring pattern 37, and passes through the corresponding slit 37b to the eye E (cornea Ec) as a light beam (measurement light) as a kerat-ring index. ). The luminous flux is projected onto the cornea Ec of the eye E, thereby forming a kerato-ring index on the cornea Ec. The kerato-ring-like index (its luminous flux) is reflected by the cornea Ec of the eye E to be imaged on the image sensor 32g by the anterior ocular segment observation optical system 32 described above. For this reason, in the anterior ocular segment observation optical system 32, the display unit 14 can display an image (image) of the kerato-ring-like index so as to overlap the image of the anterior ocular segment (cornea Ec).

Further, as shown in FIG. 3, the reflex measurement projection optical system 33 is provided with a Z direction detection parallel projection system 38 on the rear side of the kerato ring pattern 37. In the Z-direction detection parallel projection system 38, a Z-direction detection light source 38a and a condenser lens 38b are provided corresponding to a pair of transmission holes 37c (see FIG. 5) of the kerato ring pattern 37. The Z-direction detection parallel projection system 38 condenses the luminous flux emitted from each Z-direction detection light source 38a by the corresponding condenser lens 38b, and passes through the corresponding transmission hole 37c (see FIG. 5) of the kerato ring pattern 37. Advancing to the optometry E to form a Z direction detection luminescent spot. This Z-direction detection parallel projection system 38 uses the formed Z-direction detection luminescent spot in combination with the above-described kerato-ring-like index formed by the kerato-ring-like index projection light source 36 so that it can be used in the front-back direction (Z-axis direction). Adjustment of the position of the lens, so-called Z-direction alignment is possible. For this reason, the examiner can perform the Z alignment by moving the apparatus main body 13 so that the relative positional relationship between the Z-direction detection luminescent spot and the kerato-ring-like index is appropriate. . In the case of the auto alignment mode, as described above, the focus determination circuit 22 uses the signal from the image sensor 32g based on the Z-direction detection luminescent spot and the kerato-ring-like index, so that the eye E The amount of misalignment in the Z-axis direction of the apparatus main body 13 is obtained, and the control unit 21 controls the Z driver 12f in accordance with the amount of misalignment so that the apparatus main body 13 is appropriately moved in the Z-axis direction to perform XY alignment. .

The ref measurement light receiving optical system 34 includes, on the optical axis O4, a hole 34a of the perforated prism 33h, a field lens 34b, a mirror 34c, a relay lens 34d, a focusing lens 34e, and a mirror 34f. The system 31, the objective lens 31q, the dichroic filter 31p and the dichroic filter 31n are shared, the reflex measurement projection optical system 33 and the rotary prism 33i are shared, and the anterior ocular segment observation optical system 32, the dichroic filter 32e, and the imaging lens 32f And the image sensor 32g is shared. The focusing lens 34e is movable along the optical axis O4 of the reflex measurement light receiving optical system 34 by an index focusing mechanism 34D. The index focusing mechanism 34D appropriately moves the focusing lens 34e to focus on the anterior segment (cornea Ec) of the eye E under the control of the control unit 21 (see FIG. 2).

In the reflex measurement light receiving optical system 34, the pattern reflected light beam guided to the fundus oculi Ef by the reflex measurement projection optical system 33 and reflected by the fundus oculi Ef is collected by the objective lens 31q, reflected by the dichroic filter 31p, and then dichroic. The light is reflected by the filter 31n and travels to the rotary prism 33i. In the reflex measurement light receiving optical system 34, the reflected pattern reflected light beam travels through the rotary prism 33i to the hole 34a of the holed prism 33h and passes through the hole 34a. In the reflex measurement light receiving optical system 34, the pattern reflected light beam that has passed through the hole 34a is reflected by the mirror 34c after passing through the field lens 34b, and is advanced to the focusing lens 34e via the relay lens 34d. At this time, in the reflex measurement light receiving optical system 34, the pattern reflected light beam, that is, the image formation position of the reflex measurement ring-shaped index is on the image sensor 32g (its light receiving surface) on the optical axis O4 of the focusing lens 34e. The position is adjusted. In the reflex measurement light receiving optical system 34, the pattern reflected light beam passes through the focusing lens 34e, is reflected by the mirror 34f, and is reflected by the dichroic filter 32e, whereby the anterior ocular segment observation optical system 32 (eye refractive power measurement). The optical axis of the apparatus 10). In the reflex measurement light receiving optical system 34, a pattern reflected light beam, that is, a reflex measurement ring-shaped index is imaged on the image sensor 32g (its light receiving surface) by the imaging lens 32f. The imaging device 32g outputs an image signal based on the acquired image to the control unit 21 (see FIG. 2). The control unit 21 causes the display unit 14 (see FIG. 1) to display an image of the ring index for reflex measurement based on the input image signal. For this reason, the reflex measurement light receiving optical system 34 can form an image of a reflex measurement ring-shaped index on the image sensor 32g (its light receiving surface), and the image sensor 32g can acquire the image data. An image of the ref measurement ring-shaped index can be displayed on the display unit 14.

The XY alignment light projection optical system 35 includes an XY direction detection light source 35a and a condensing lens 35b. The XY alignment light projection optical system 35 shares the anterior ocular segment observation optical system 32 and half mirror 32b, and the target projection optical system 31 and dichroic filter. 31p and the objective lens 31q are shared. The XY direction detection light source 35a is a spot-like light source that forms an XY alignment index light beam, and an LED is used.

In the XY alignment light projection optical system 35, the XY alignment index light beam from the XY direction detection light source 35 a is condensed by the condenser lens 35 b and then reflected by the half mirror 32 b, so that the anterior ocular segment observation optical system 32 ( It advances on the main optical axis O1 of the optical configuration of the eye refractive power measuring apparatus 10). In the XY alignment light projection optical system 35, the XY alignment index light beam travels to the objective lens 31q through the dichroic filter 31p, and is projected as an XY alignment index light beam toward the cornea Ec of the eye E through the objective lens 31q. To do. The XY alignment index light beam projected toward the eye E (cornea Ec) is reflected by the cornea Ec of the eye E, and is used as an XY alignment index image on the image sensor 32g by the anterior ocular segment observation optical system 32. A bright spot image is projected. The XY alignment light projection optical system 35 enables adjustment of the position in the XY direction, so-called XY alignment, by using the bright spot image as the formed XY alignment index image. Therefore, the examiner can perform the XY alignment by moving the apparatus main body 13 so that the bright spot image as the XY alignment index image is positioned within the set alignment mark. In the case of the auto alignment mode, as described above, the alignment determination circuit 23 obtains the amount of deviation in the X axis direction and the Y axis direction of the apparatus main body 13 with respect to the eye E from the position of the XY alignment index image, The control unit 21 controls the X driver 12d and the Y driver 12e according to the amount of deviation, thereby moving the apparatus main body 13 in the XY direction to perform XY alignment.

Next, an outline of measuring the eye refractive power (spherical power, astigmatism power, astigmatic axis angle, etc.) of the eye E and the shape of the cornea Ec of the eye E using the eye refractive power measuring apparatus 10 described above. A typical operation will be described. In addition, the following operation | movement in the eye refractive power measuring apparatus 10 is performed under control of the control part 21 (refer FIG. 2). First, the power switch of the eye refractive power measurement apparatus 10 is turned on, and an operation for performing objective measurement is performed on the display unit 14. Then, in the eye refractive power measuring apparatus 10, in the anterior ocular segment observation optical system 32, the anterior ocular segment illumination light source 32a is turned on and an image of the anterior ocular segment (cornea Ec) is displayed on the display unit 14. Then, in the eye refractive power measuring apparatus 10, as described above, the apparatus main body 13 is appropriately moved with respect to the base 11, and the vertical direction (Y-axis direction), left-right direction (X-axis direction), and front-back direction (Z Axial alignment).

Then, the eye refractive power measuring device 10 turns on the light source 33a for the reflex measurement projection optical system 33, and the pattern light flux of the ring-shaped index for the eye refraction power measurement (reflective measurement) is received on the main optical axis O1. Project onto the fundus oculi Ef of the optometry E. In the eye refractive power measurement device 10, the reflex measurement ring-shaped index reflected by the fundus oculi Ef is imaged on the image sensor 32 g by the reflex measurement light receiving optical system 34. The imaging device 32g outputs an image signal based on the acquired image to the control unit 21 (see FIG. 2). The control unit 21 causes the display unit 14 (see FIG. 1) to display an image of the ring index for reflex measurement based on the input image signal. Then, in the control unit 21, based on the image displayed on the display unit 14 (image signal from the image sensor 32 g), the spherical power as the eye refractive power from the image of the ring index for reflex measurement projected onto the fundus oculi Ef. Measure cylinder power and shaft angle. The details of the measurement of the spherical power, the cylindrical power, and the shaft angle as the eye refractive power are well known and will not be described.

Further, in the eye refractive power measuring apparatus 10, the keratring index projection light source 36 of the reflex measurement projection optical system 33 is turned on, and the keratling index is projected onto the cornea Ec of the eye E with the main optical axis O1. In the eye refractive power measurement device 10, the keratoling index reflected by the cornea Ec of the eye E is imaged on the image sensor 32 g by the anterior ocular segment observation optical system 32. The imaging device 32g outputs an image signal based on the acquired image to the control unit 21 (see FIG. 2). The control unit 21 causes the display unit 14 (see FIG. 1) to display an image of the keratoling index based on the input image signal. Then, the control unit 21 measures the shape of the cornea Ec from the image of the kerato-ring index projected on the cornea Ec based on the image displayed on the display unit 14 (image signal from the imaging element 32g). Since the details of the measurement of the shape of the cornea Ec are known, the description thereof is omitted. For this reason, in the eye refractive power measuring apparatus 10, the kerato-ring type index projection light source 36 of the reflex measurement projection optical system 33 directs another measurement light different from the measurement light for measuring the eye refractive power toward the eye E to be examined. The anterior eye portion observation optical system 32 functions as an eye characteristic measurement light receiving optical system that receives reflected light from the eye E of other measurement light.

Thus, the control unit 21 performs measurement of the eye refractive power and measurement of the corneal shape. In addition, the control part 21 stores a calculation result etc. in a memory | storage part (illustration is abbreviate | omitted) suitably. Thereby, the eye refractive power measuring apparatus 10 can measure the eye refractive power (spherical power, astigmatism power, astigmatism axis angle, etc.) of the eye E and the shape of the cornea Ec of the eye E. In the eye refractive power measuring apparatus 10, the above-described operation is performed on both eyes of the subject so that the eye refractive power (spherical power, astigmatic power, astigmatic axis angle, etc.) of both eyes and the cornea. The shape of Ec can be measured. At this time, the eye refractive power measuring apparatus 10 performs the above-described measurement of the eye E without covering the eye on the opposite side of the eye E to which the subject is performing measurement or meditating the eye. It can be carried out.

Next, a characteristic configuration of the eye refractive power measurement apparatus 10 of Example 1 as an example of an eye refractive power measurement apparatus (optometry apparatus) according to the present invention will be described with reference to FIGS. In the eye refractive power measuring device 10, as described above, the target projection optical system 31 causes the subject to pay attention to the target light beam as the subjective target projected onto the subject's eye E, thereby responding to the subjective target. Awareness measurement can be performed. The eye refractive power measurement apparatus 10 can cause the subject to gaze at the target light flux that has passed through the grid chart 31v (Amsler chart) (see FIG. 4) as a chart as a subjective visual target, and uses this grid chart 31v. Can perform subjective measurement (grid chart test). FIG. 6 shows the display contents on the display unit 14 (display surface 14a) in the scene where the subjective measurement using the grid chart 31v is performed after the objective measurement is performed.

Along with this, in the eye refractive power measurement apparatus 10, under the control of the control unit 21 (see FIG. 2), the anterior eye part of the eye E (see FIG. 6) is displayed on the display surface 14a of the display unit 14 as shown in FIG. In addition to the anterior eye image E ′) and the measurement result 41 by objective measurement, various symbols are displayed as icons that enable a selection (switching) operation by touching using the function of the touch panel in the display unit 14. . In Example 1, the measurement result 41 shows a reflex measurement result 41a indicating each value related to the measured eye refractive power, a kerato measurement result 41b indicating each value related to the shape of the measured cornea Ec, and a visual target. A visual target power 41c indicating the power of the eye and a visual acuity 41d indicating each numerical value relating to the visual acuity of the eye E to be examined are shown. In the example shown in FIG. 6, one measurement result 41 is displayed on each of the left and right sides, but the measurement result 41 shows the measurement result of the right eye E when viewed from the front, and the right side when viewed from the front. Shows the measurement result of the left eye E.

As the various symbols to be displayed, in the first embodiment, the objective awareness switching symbol 42, the measurement mode selection symbol 43, the chart switching symbol 44, the result display symbol 45, and the print execution symbol 46 are set. ing.

The other consciousness switching symbol 42 is used to switch between performing the above-mentioned consciousness measurement and performing consciousness measurement. In the scene shown in FIG. 6, the objective awareness switching symbol 42 is a scene where subjective measurement is being performed. Therefore, when touched, the subjective awareness switching symbol 42 switches from subjective measurement to objective measurement.

The measurement mode selection symbol 43 is used to select one of a reflex mode for measuring eye refractive power, a kerato mode for measuring the shape of the cornea Ec, and a reflex kerato mode for measuring both in objective measurement. is there. Since the measurement mode selection symbol 43 is used to select a measurement to be performed in the objective measurement, the measurement mode selection symbol 43 has no particular function in the scene shown in FIG.

The chart switching symbol 44 is used to switch the subjective visual target to be projected onto the eye E. In the eye refractive power measuring apparatus 10 of the first embodiment, as described above, the grid chart 31v (Amsler chart) (see FIGS. 3 and 4) and the VA chart (not shown) are prepared as subjective visual targets. Therefore, the grid chart 31v and the VA chart are switched. The chart switching symbol 44 indicates that the grid chart 31v is selected in the scene shown in FIG. 6, and is switched from the grid chart 31v to the VA chart (not shown) when touched. Become.

The result display symbol 45 is used to select whether or not to display the measurement result 41 by the objective measurement. Since the result display symbol 45 displays the measurement result 41 in the scene shown in FIG. 6, the display of the measurement result 41 is stopped when touched.

The print execution symbol 46 prints and outputs the screen displayed on the display surface 14a of the display unit 14 or the display content (measurement result) displayed as the measurement result 41.

Furthermore, in the eye refractive power measuring apparatus 10, under the control of the control unit 21 (see FIG. 2), the grid auxiliary for assisting the grid chart test as the subjective measurement using the grid chart 31v on the display surface 14a of the display unit 14. The symbol 47 is displayed. The grid auxiliary symbol 47 includes five gaze points (D1 to D5 (see FIG. 4)) provided on the grid chart 31v (Amsler chart) on a grid symbol imitating the grid chart 31v (Amsler chart). ), Five check marks 47a to 47e are provided. The check mark 47a corresponds to the central gazing point D1, the check mark 47b corresponds to the peripheral gazing point D2, the check mark 47c corresponds to the peripheral gazing point D3, and the check mark 47d corresponds to the peripheral gazing point D4. The mark 47e corresponds to the peripheral gazing point D5. Each of the check marks 47a to 47e changes the display form when touched so that it can be identified whether or not it has been touched. In the first embodiment, the color changes.

Next, an operation when performing a grid chart test as a subjective measurement using the grid chart 31v (Amsler chart) by the eye refractive power measurement apparatus 10 according to the first embodiment of the present invention will be described. In addition, the following operation | movement in the eye refractive power measuring apparatus 10 is performed under control of the control part 21 (refer FIG. 2). First, on the display unit 14, an operation for performing an objective measurement is performed by touching the objective awareness switching symbol 42. Then, by touching the chart switching symbol 44 on the display unit 14, an operation for using the grid chart 31 v (Amsler chart) is performed.

Then, the eye refractive power measuring apparatus 10 performs alignment of the apparatus main body 13 with respect to the eye E as in the case of measuring the shape of the cornea Ec and the eye refractive power of the eye E. This alignment may not be performed because the grid chart test (objective measurement) is performed after the measurement of the eye refractive power of the eye E or the shape of the cornea Ec. Good. Then, in the eye refractive power measuring apparatus 10, the grid chart 31v is changed to the optical axis O2 of the target projection optical system 31 by driving the switching drive unit 31s of the index switching unit 31d and appropriately changing the rotational posture of the turret unit 31r. Position on top. Moreover, in the eye refractive power measuring apparatus 10, when the eye refractive power of the eye E to be examined is previously measured, the target lens 31h is projected by the target focusing mechanism 31D using the measurement result. Focus adjustment is performed by appropriately moving the optical system 31 along the optical axis O2. Thereby, in the eye refractive power measuring apparatus 10, the grid chart 31v is simulated at a position where the power is suitable when looking far away in the eye E, or at a position where the power is suitable when looking near in the eye E. Move on. In addition, in the eye refractive power measuring apparatus 10, when the visual acuity test is performed by subjective measurement using the VA chart, the target lens 31h is detected by the target focusing mechanism 31D using the measurement result. Focus adjustment is performed by appropriately moving the projection optical system 31 along the optical axis O2. In the eye refractive power measuring apparatus 10, the target light source 31a is turned on in the target projection optical system 31, and the target light beam as the grid chart 31v is projected onto the eye E, and the grid chart 31v is used as the main optical axis. Present (project) to the eye E on O1.

Then, as shown in FIG. 7, the subject can see only a certain range from the center of the grid chart 31v. This is due to the following. In the target projection optical system 31, as described above, when the grid chart 31v (see FIG. 4) is positioned on the optical axis O2 of the target projection optical system 31, the grid chart 31v has a predetermined size. The state is the same as that provided at a position 30 to 40 cm away from the eye E. Then, in the target projection optical system 31, the visual field Vf from the eye E is limited, and it becomes difficult to make the subject see (recognize) the entire grid chart 31v. Therefore, when the grid chart 31v (Amsler chart) is presented by the target projection optical system 31 of the eye refractive power measurement apparatus 10, the subject can see only a certain range from the center of the grid chart 31v. It becomes. In the grid chart 31v, a certain range (field of view Vf) from the center is a range corresponding to the center (macular portion) of the retina (fundus) Ef of the eye E to be inspected with the central gazing point D1. In the example shown in FIG. 7, the visual field Vf is surrounded by a circle and is a region indicated by the solid line of the grid chart 31v. For the sake of easy understanding, FIG. 7 schematically shows how the grid chart 31v can be seen using the eye refractive power measuring apparatus 10, and does not necessarily match the actual appearance. In addition, in the grid chart 31v, a plurality of peripheral gazing points (D2 to D5) are positioned at the peripheral edge of the visual field Vf in the target projection optical system 31. Then, the eye E (subject) recognizes the outside of the visual field Vf as completely dark (shown with hatching in FIG. 7).

Here, in the subjective measurement using the grid chart 31v (Amsler chart), that is, the grid chart test, when the lattice-like pattern looks distorted, partly looks missing, or partly looks blurred, attention is paid. It is determined that there is a possibility of a disease including the center (macular region) of the retina (fundus) Ef in the eye E to be examined or a surrounding disease. In this grid chart test, distortion, chipping, and blurring often occur near the center of the field of view, that is, in the center (macular area) of the retina (fundus) Ef of the eye E to be examined. From this, in the grid chart test, even if the subject can only see a certain range from the center of the grid chart 31v (a range corresponding to the center (macular area) of the retina (fundus) Ef), It is considered very unlikely that the judgment will be hindered.

For this reason, in the eye refractive power measuring apparatus 10, the eye projection optical system 31 presents to the eye E a range corresponding to the center (macular region) of the retina (fundus) Ef in the grid chart 31v (Amsler chart). Therefore, there is a possibility of a disease in the center (macular region) of the retina (fundus) Ef in the eye E by performing the above-described confirmation of the appearance with the central gazing point D1 as the fixation target. It can be confirmed whether or not.

In addition, in the eye refractive power measurement apparatus 10 according to the first embodiment of the present invention, the center of the center position is displayed on the grid chart 31v in order to enable the above-described appearance to be confirmed in a range other than a certain range from the center. Four peripheral gazing points (D2 to D5) are provided so as to surround the gazing point D1. For this reason, in the grid chart test using the grid chart 31v, the grid-like pattern looks distorted or partially missing with each peripheral gaze point (D2 to D5) gaze as a fixation target. Check with the subject to see if some of them appear blurry. Thereby, in the eye refractive power measuring apparatus 10, even if only a certain range from the center of the grid chart 31v is visible, it is possible to make the same determination as when the entire grid chart 31v is shown. This is due to the following.

First, the four peripheral gazing points (D2 to D5) are provided at the center positions of the divided areas obtained by dividing the grid chart 31v into four by the vertical and horizontal lines including the central gazing point D1 (center position) as described above. ing. As described above, since the peripheral gazing points (D2 to D5) are located at the peripheral edge of the visual field Vf in the target projection optical system 31, the peripheral gazing point D2 is as shown in FIG. In addition, it is located at the upper left peripheral edge in the visual field Vf. Therefore, when the peripheral gaze point D2 is gazeed as a fixation target and the above-described appearance is confirmed, there is a grid chart 31v located in the lower right of the visual field Vf with respect to the peripheral gaze point D2. It will be. With the visual field Vf as a reference, the central gazing point D1 is positioned at the position of the peripheral gazing point D2 inward of the visual field Vf, thereby replacing the central gazing point D1 with the grid chart 31v. it can. For this reason, as shown in FIG. 8B, the state in which the peripheral gazing point D2 is watched is the state in which the central gazing point D1 is gazed using the grid chart 31v, and the visual field Vf is viewed with respect to the grid chart 31v. It can be considered that it is equivalent to the case of shifting to the lower right. The entire lower right divided region (the portion shown with hatching) of the entire grid chart 31v is located inside the visual field Vf at that time. Therefore, by confirming the above-mentioned appearance by gazing at the peripheral gazing point D2, the lower right divided region (within the visual field Vf including the same) of the entire grid chart 31v when the central gazing point D1 is gazed. It can be considered that the appearance was confirmed in (). Thereby, it is possible to confirm whether or not there is a possibility of a disease in the region of the lower right region of the eye E (lower left region when the eye E is viewed from the front).

Similarly, as shown in FIG. 9 (a), the peripheral gazing point D3 is gazed as a fixation target, and the above-described appearance is confirmed, thereby gazing at the central gazing point D1 as shown in FIG. 9 (b). It can be considered that the appearance of the lower left divided region (in the visual field Vf including the grid region 31v) in the entire grid chart 31v at the time of confirmation is confirmed. Thereby, it is possible to confirm whether or not there is a possibility of a disease in the lower left region of the eye E (the lower right region when the eye E is viewed from the front).

Similarly, as shown in FIG. 10 (a), the peripheral gazing point D4 is gazed as a fixation target, and the above-described appearance confirmation is performed, so that the central gazing point D1 is gazed as shown in FIG. 10 (b). It can be considered that the appearance in the upper right divided area (within the visual field Vf including the grid area 31v) of the entire grid chart 31v at the time of checking is confirmed. Thereby, it is possible to confirm whether or not there is a possibility of a disease in the upper right region of the eye E (the upper left region when the eye E is viewed from the front).

Similarly, as shown in FIG. 11A, the peripheral gazing point D5 is gazed as a fixation target, and the above-described appearance is confirmed, so that the central gazing point D1 is gazed as shown in FIG. 11B. It can be considered that the appearance in the upper left divided region (in the visual field Vf including the grid region 31v) of the entire grid chart 31v at the time of confirmation is confirmed. Thereby, it is possible to confirm whether or not there is a possibility of a disease in the upper left region of the eye E (the upper right region when the eye E is viewed from the front).

Therefore, in the eye refractive power measuring apparatus 10, the central gaze point D1 is shown while showing the entire grid chart 31v by gazing each of the four peripheral gaze points (D2 to D5) as fixation targets and confirming the appearance. It is possible to make the same determination as when the appearance is confirmed by gazing. Thereby, it is possible to confirm whether or not there is a possibility of a disease in the entire region of the eye E, and to individually confirm which part of the eye E is likely to be a disease. it can. Note that the change of each gazing point (D1 to D5) to be gazed as the fixation target is performed according to an instruction from the examiner. That is, the examiner instructs the subject to watch one of the gazing points (D1 to D5), and the subject gazing at the gazing point (D1 to D5) instructed, The above changes are made.

In this eye refractive power measurement device 10, when the subject gazes at the central gazing point D1, the subject feels abnormal in appearance (the lattice pattern appears distorted or partially missing). When the examiner touches the check mark 47a (see FIG. 6) in the grid auxiliary symbol 47, the display form is changed. Similarly, when the subject feels an abnormality in the appearance, the check mark 47b (see FIG. 6) is used when the peripheral gaze point D2 is watched, and the check mark 47c (see FIG. 6) is used when the peripheral gaze point D3 is watched. 6), touch the check mark 47d (see FIG. 6) when the peripheral gaze point D4 is watched, and change the display form by touching the check mark 47e (see FIG. 6) when the gaze point is the peripheral gaze point D5. Let As a result, in the eye refractive power measurement apparatus 10, when the display form of each check mark (47a to 47e) is changed, the corresponding gazing point (D1 to D5) is gazed as a fixation target and the above-described appearance It is possible to indicate that an abnormality was observed in the appearance when the confirmation was performed. For this reason, in the eye refractive power measuring apparatus 10, it is easy to confirm in which region (near the center or each divided region) of the entire grid chart 31v that the subject feels abnormal. Thus, it is possible to easily confirm which part of the eye E has a possibility of disease.

In the eye refractive power measuring apparatus 10, by performing the above-described objective measurement (grid chart test) on both eyes, it is confirmed that there is a possibility of disease in any part of both eyes of the subject. Can do. Thereby, in the eye refractive power measuring apparatus 10, the grid chart test (consciousness measurement) using the grid chart 31v can be performed with respect to the right and left eye E to be examined.

In an eye refractive power measuring apparatus 10 as an embodiment 1 of an eye refractive power measuring apparatus (optometry apparatus) according to the present invention, an anterior ocular segment observation optical system 32 (eye refractive power measuring apparatus 10) is provided by a target projection optical system 31. The grid chart 31v (Amsler chart) is presented (projected) to the eye E on the main optical axis O1 in the optical configuration. For this reason, in the eye refractive power measuring apparatus 10, the grid chart 31v (Amsler chart) with respect to the eye E is set to have a predetermined distance and posture as in the case of measuring the eye refractive power as objective measurement, while the grid A subjective measurement (grid chart test) using the chart 31v can be performed. Thereby, in the eye refractive power measuring apparatus 10, the said subjective measurement (grid chart test) can be performed appropriately, and it can be confirmed whether there is a possibility of a disease appropriately.

Further, in the eye refractive power measuring apparatus 10, the grid chart 31v (on the main optical axis O1 in the anterior ocular segment observation optical system 32 (optical configuration of the eye refractive power measuring apparatus 10) is caused by the target projection optical system 31. (Amsler chart) is presented (projected) to the eye E. For this reason, in the eye refractive power measuring apparatus 10, as in the case of measuring the eye refractive power as an objective measurement, the subject covers the eye opposite to the eye E to be measured, or the eye Awareness measurement (grid chart test) using the grid chart 31v can be performed without meditating. Thereby, in the eye refractive power measuring apparatus 10, it can prevent that a subject becomes a hindrance to gaze, the said subjective measurement (grid chart test) can be performed appropriately, and a disease can be appropriately detected. It can be confirmed whether or not there is a possibility.

Furthermore, in the eye refractive power measuring apparatus 10, the grid chart 31v is provided by the target projection optical system 31 at a predetermined distance and a predetermined distance from the eye E (30 to 40 cm in the first embodiment). The grid chart 31v is presented to the eye E as a state equal to the above. For this reason, the eye refractive power measurement apparatus 10 can perform subjective measurement (grid chart test) using the grid chart 31v while presenting the grid chart 31v (Amsler chart) to the eye E in a more appropriate state. . Thereby, in the eye refractive power measuring apparatus 10, the said subjective measurement (grid chart test) can be performed appropriately, and it can be confirmed whether there is a possibility of a disease appropriately.

In the eye refractive power measuring apparatus 10, the target projection optical system 31 is set to a state equivalent to that in which the grid chart 31v is provided at a position having a predetermined size and a predetermined distance (30 to 40 cm) from the eye E. The grid chart 31v (Amsler chart) is presented (projected) to the eye E on the main optical axis O1. Here, in general, in subjective measurement using an Amsler chart, the subject himself / herself holds or installs it so that the distance to the Amsler chart formed of paper or electronic media is a predetermined distance. Check the appearance. For this reason, there is a possibility that individual differences may be born in the presentation distance of the Amsler chart, or that the wrong method may be used. On the other hand, in the eye refractive power measuring apparatus 10, the subjective measurement using the grid chart 31v (Amsler chart) by an appropriate method while presenting the grid chart 31v (Amsler chart) at a predetermined distance regardless of the subject. It can be performed.

When the eye refractive power measuring apparatus 10 has previously measured the eye refractive power of the eye E, the eye projection optical system 31 moves the focusing lens 31h by the target focusing mechanism 31D using the measurement result. In a state in which the focus is adjusted by appropriately moving along the optical axis O2, that is, when the grid chart 31v is a frequency suitable for looking far away in the eye E or when looking close in the eye E In the state where it is pseudo-moved to a position where the frequency becomes a frequency, the subjective measurement using the grid chart 31v (Amsler chart) is performed. Here, in general, in subjective measurement using the Amsler chart, it is necessary for the subject to use glasses corrected for binocular vision according to visual acuity, and how the grid pattern looks appropriately There is a possibility that it cannot be confirmed properly. On the other hand, since the eye refractive power measurement apparatus 10 performs subjective measurement with the focus adjusted as described above, the grid chart 31v (Amsler chart) can be used without using binocular corrected glasses. It can be shown to a subject (eye E). At this time, the eye refractive power measuring apparatus 10 can confirm the appearance while showing the grid chart 31v (Amsler chart) in a state close to the correction value of only one eye in the eye E. For this reason, in the eye refractive power measuring apparatus 10, since the subject can confirm the appearance of the grid chart 31v (Amsler chart) more clearly, the subjective measurement (grid chart test). Can be performed more appropriately, and whether or not there is a possibility of a disease can be confirmed more appropriately.

Since the eye refractive power measurement device 10 performs subjective measurement with the focus adjusted as described above, the grid chart 31v (Amsler chart) can be shown without using glasses with binocular vision correction. . Here, when glasses with binocular vision correction are used, they are affected by distortion due to astigmatism and distortion of the glasses lens. For this reason, the eye refractive power measurement apparatus 10 can perform subjective measurement using the grid chart 31v (Amsler chart) in a state in which such other influences are excluded, and thus the subjective measurement (grid chart test). Can be performed more appropriately, and whether or not there is a possibility of a disease can be confirmed more appropriately.

The eye refractive power measuring apparatus 10 presents to the eye E a range corresponding to the center (macular area) of the retina (fundus) Ef in the grid chart 31v (Amsler chart). For this reason, in the eye refractive power measuring apparatus 10, the subject's attention can be directed only to a range corresponding to the center (macular portion) of the retina (fundus) Ef in the grid chart 31v (Amsler chart). Thereby, in the eye refractive power measuring apparatus 10, whether there is a possibility of a disease in the range corresponding to the center (macular region) of the retina (fundus) Ef in the eye E using the grid chart 31v (Amsler chart). Can be confirmed more appropriately.

In the eye refractive power measuring apparatus 10, a plurality of peripheral gazing points (four in the first embodiment) are provided on the grid chart 31v so as to surround the central gazing point D1 at the center position. For this reason, in the eye refractive power measuring apparatus 10, even if the grid chart 31v (Amsler chart) that can be shown to the eye E (subject) by the target projection optical system 31 is small, each peripheral note By checking the appearance while gazing at the viewpoint as a fixation target, it is possible to confirm whether or not there is a possibility of a disease in a larger range than the grid chart 31v that is actually shown.

In the eye refractive power measurement apparatus 10, a plurality of peripheral gazing points (four in the first embodiment) are provided at the peripheral edge of the visual field Vf in the target projection optical system 31. Therefore, in the eye refractive power measurement apparatus 10, whether or not there is a possibility of a disease in the largest range using the grid chart 31v (Amsler chart) in the visual field Vf that can be shown to the eye E (subject). Can be confirmed.

In the eye refractive power measurement apparatus 10, the grid chart 31v (Amsler chart) is formed in a square shape, and the grid chart 31v is divided into four centers by vertical and horizontal lines including the central gazing point D1 (center position). Four peripheral gazing points (D2 to D5) are provided at the position. Therefore, in the eye refractive power measurement device 10, the four peripheral gazing points (D2 to D5) are gazed as fixation targets, respectively, and the appearance is confirmed to confirm the square shape defined by each peripheral gazing point. It can be confirmed whether or not there is a possibility of a disease on the grid chart 31v having an area four times as large as the region. Thereby, in the eye refractive power measuring apparatus 10, the subjective measurement using the grid chart 31v (Amsler chart) can be performed more efficiently.

In the eye refractive power measuring apparatus 10, the peripheral portion of the visual field Vf in the target projection optical system 31, and the peripheral portion in a range corresponding to the center (macular portion) of the retina (fundus) Ef in the grid chart 31v (Amsler chart). In addition, a plurality of peripheral gazing points (four in the first embodiment) are provided. For this reason, in the eye refractive power measuring apparatus 10, each peripheral gazing point is gazeed as a fixation target, and subjective measurement using the grid chart 31 v (Amsler chart) is performed, so that any part of the eye E can be affected. It can be confirmed whether there is sex.

In the eye refractive power measurement device 10, each gaze point (D1 to D5) is gazeed as a fixation target, and subjective measurement is performed using the grid chart 31v (Amsler chart). It is possible to check individually whether or not there is a possibility. That is, in the eye refractive power measuring apparatus 10, in the eye E to be examined, if the center gazing point D1 is gazed, the center (macular portion) portion of the retina (fundus) Ef and the peripheral gazing point D2 are gazeed, the lower right region ( When the eye E is viewed from the front, the lower left area) and the peripheral gazing point D3 are gazed, and the lower left area (lower right area when the eye E is viewed from the front) is gazed. And the upper right area (upper left area when the subject eye E is viewed from the front), and the upper left area (upper right area when the eye E is viewed from the front) when the peripheral gazing point D5 is watched. It can be confirmed whether or not there is a possibility. As described above, the eye refractive power measurement apparatus 10 confirms the presence or absence of a disease for each region (region) in the eye E according to the position and the number of gazing points provided on the grid chart 31v (Amsler chart). can do. In other words, the eye refractive power measurement apparatus 10 can perform subjective measurement using the grid chart 31v (Amsler chart) for each part (region) in the eye E according to the position and number of each gazing point. It is possible to appropriately grasp which part (region) in the eye E to be examined has a possibility of a disease, which has been difficult by the subjective measurement using the conventional Amsler chart. For this reason, in the eye refractive power measuring apparatus 10, in addition to being able to confirm whether or not there is a possibility of a disease in the entire region of the eye E, in which part of the eye E there is a possibility of a disease. It can be confirmed individually.

In the eye refractive power measurement device 10, when the subject feels abnormal as a result of gazing at each gazing point (D 1 to D 5), the examiner responds with the grid auxiliary symbol 47. By touching each of the check marks (47a to 47e) and changing the display form, it is possible to easily record which gazing point (D1 to D5) is felt abnormal when viewed. . For this reason, in the eye refractive power measuring apparatus 10, it is easy to confirm in which region (near the center or each divided region) of the entire grid chart 31v that the subject feels abnormal. Thus, it is possible to easily confirm which part of the eye E is likely to have a disease.

In the eye refractive power measurement apparatus 10, the grid chart 31v (Amsler chart) transmits the light (light flux) from the target light source 31a at the location of the lattice pattern, thereby presenting the grid chart 31v to the eye E. ing. For this reason, the eye refractive power measuring apparatus 10 can present the grid chart 31v to the eye E with a simple configuration.

In the eye refractive power measuring apparatus 10, the portion of the lattice pattern is brightened by transmitting the light (light beam) from the target light source 31a, the other portion is darkened, and the outside of the visual field Vf is outside. The grid chart 31v (Amsler chart) is presented to the eye E (subject) as darkness. For this reason, in the eye refractive power measuring apparatus 10, since the grid chart 31v (Amsler chart) can be shown more clearly to the eye E (subject), subjective measurement using the grid chart 31v (Amsler chart) (grid chart) Test) can be performed more appropriately, and whether or not there is a possibility of disease can be confirmed more appropriately.

In the eye refractive power measuring apparatus 10, the grid chart 31v is presented to the eye E by making the grid chart 31v transmit light (light flux) from the target light source 31a. For this reason, in the eye refractive power measuring apparatus 10, in the target projection optical system 31, another target that transmits the light (light beam) from the target light source 31a can be exchanged with the grid chart 31v. An index can be presented to the eye E. Thereby, in the eye refractive power measuring apparatus 10, usability can be improved.

In the eye refractive power measuring apparatus 10, the grid chart 31v and other targets (fixed target and VA chart in the first embodiment described above) are provided in the turret unit 31r of the index switching unit 31d, and the turret unit 31r rotates. The target to be positioned on the optical axis O2 is changed by appropriately changing the posture. For this reason, in the eye refractive power measuring apparatus 10, various indexes can be presented to the eye E with a simple configuration, and usability can be improved.

In the eye refractive power measurement device 10, when the visual acuity test is performed by subjective measurement using the VA chart, the focus lens 31h is moved by the visual target focusing mechanism 31D using the measurement result. The focus is adjusted by appropriately moving along the optical axis O2. For this reason, in the eye refractive power measuring apparatus 10, since the subjective measurement using the grid chart 31v (Amsler chart) can be performed with further refractive correction, the subjective measurement (grid chart test) is more appropriately performed. It is possible to confirm whether or not there is a possibility of the disease more appropriately.

In the eye refractive power measuring apparatus 10, in addition to the eye refractive power of the eye E, the shape of the cornea Ec of the eye E as another optical characteristic of the eye E different from the eye E can be measured. For this reason, in the eye refractive power measuring apparatus 10, usability can be improved more.

In the eye refractive power measurement apparatus 10, since the size of the grid chart 31v presented to the eye E can be reduced, the subject's attention can be directed only to a narrower region. Therefore, the subjective measurement (grid chart test) using the grid chart 31v (Amsler chart) can be performed more appropriately, and it can be confirmed whether or not there is a possibility of a disease more appropriately.

Therefore, in the eye refractive power measuring apparatus 10 of Example 1 as an example of the eye refractive power measuring apparatus (optometry apparatus) according to the present invention, subjective measurement using an Amsler chart can be easily and appropriately performed. .

In Example 1 described above, the refraction measurement projection optical system 33 and the reflex measurement light receiving optical system 34 measure the refractive power of the eye E by objective measurement. An eye refractive power measuring apparatus (optometry apparatus) capable of measuring the eye refractive power of the eye E regardless of measurement, and an optotype presenting optical system for presenting an Amsler chart (grid chart 31v) to the eye E Any eye refractive power measuring device (optometry device) provided with the (target projection optical system 31) may be used, and the configuration of the first embodiment is not limited thereto.

In Example 1 described above, the grid chart 31v provided in the target projection optical system 31 (target presentation optical system) is larger than the visual field Vf from the eye E in the target projection optical system 31. I used it. However, since the target projection optical system 31 cannot show (recognize) the position of the grid chart 31v located outside the visual field Vf as described above, for example, the grid chart 31v ′ ( As shown in FIG. 12, a grid chart having a size that can be positioned inward of the visual field Vf in advance may be used. FIG. 12 shows a grid chart 31v ′ as an example of a grid chart having a size that can be positioned inside the visual field Vf. The grid chart 31v ′ is positioned inside the four peripheral gazing points (D2 to D5) in the grid chart 31v of the first embodiment (see FIG. 4) so as to have a size dimension positioned inward of the visual field Vf. It has a square shape with a corresponding size, and is composed of 10 grids (cells) arranged in the vertical and horizontal directions. In the grid chart 31v ′, one central gazing point D1 ′ is provided at the central position as in the grid chart 31v. Unlike the grid chart 31v, each peripheral gazing point (D2 to D5) is not provided. . However, in the grid chart 31v ′, the locations corresponding to the respective peripheral gazing points (D2 to D5) in the grid chart 31v are the four corners in the lattice pattern, and thus each corner is referred to as the peripheral gazing point (D2 ′ to D5 ′). ) Can be used. That is, in the grid chart 31v ′, the four corners of the grid pattern are easy to guide as a fixation target, and the subject can easily understand and focus as the fixation target. Therefore, the peripheral gazing points (D2 ′ to D5 ′) can be set. With such a configuration, the grid chart 31v ′ provided in the index switching unit 31d (its turret unit 31r) can be made smaller, so that the size of the entire eye refractive power measuring apparatus 10 can be reduced. It is possible to obtain the same effect as in the first embodiment. The grid chart 31v ′ may be provided with peripheral gaze points (D2 to D5) similar to those of the grid chart 31v, or may be provided with a peripheral gaze point appropriately at a different position. Well, it is not limited to the example shown in FIG. Further, each of the peripheral gazing points and the central gazing point is formed by a plurality of light sources (such as LEDs) as long as the same effects as those of the gazing points (D1 to D5) described above can be obtained. Alternatively, other configurations may be used, and the present invention is not limited to the first embodiment described above (including the example shown in FIG. 12). At this time, it is desirable that each gaze point is easy for the examiner to guide as a fixation target, or easy for the subject to easily understand and gaze as the fixation target.

In the first embodiment described above, in the target projection optical system 31 (target presentation optical system), the grid chart 31v (Amsler chart) transmits the light (light beam) from the target light source 31a at the location of the lattice pattern. Thus, the grid chart 31v is presented to the eye E. However, if the target chart optical system 31 presents the grid chart 31v to the eye E, the grid chart (Amsler chart) is displayed on a display screen of an image forming apparatus such as a liquid crystal panel. It may be present and is not limited to the first embodiment described above. This can be realized by using an image forming apparatus such as a liquid crystal panel in the target projection optical system 31 instead of the target light source 31a, the color correction filter 31b, the collimator lens 31c, and the index switching unit 31d. Can do. In this case, the eye refractive power measurement device 10 can be configured more simply. Moreover, even if it is a case where the color of a grid chart (Amsler chart) is changed as mentioned above, it can respond easily. Furthermore, since each peripheral gazing point can be provided freely, usability can be further improved.

In the first embodiment described above, in the target projection optical system 31 (target presentation optical system), the grid chart 31v (Amsler chart) transmits the light (light beam) from the target light source 31a at the location of the lattice pattern. It is assumed that the grid chart 31v and other targets (in the first embodiment described above, the fixation target and the VA chart) can be switched by the turret unit 31r of the index switching unit 31d. However, it is only necessary to be able to switch between the grid chart 31v and another target, and is not limited to the first embodiment described above.

In Example 1 described above, when performing subjective measurement (grid chart test) using the grid chart 31v (Amsler chart), the screen (display content) shown in FIG. 6 is displayed on the display surface 14a of the display unit 14. . However, the embodiment is not limited to the above-described first embodiment as long as it can perform the subjective measurement (grid chart test) using the grid chart 31v (Amsler chart).

In the first embodiment described above, the reflex measurement projection optical system 33 and the reflex measurement light receiving optical system 34 are provided to measure the eye refractive power of the eye E by objective measurement. However, the reflected light from the eye E is reflected. As long as the optical power of the eye E is measured and the refractive power of the subject eye E is measured, the optical configuration, the arrangement of the optical members and the measurement principle may be different, and the present invention is limited to the first embodiment described above. It is not something.

In the first embodiment described above, in the grid auxiliary symbol 47 displayed on the display surface 14a of the display unit 14, the check mark 47b corresponds to the peripheral gazing point D2, the check mark 47c corresponds to the peripheral gazing point D3, and the check mark 47d. Corresponds to the peripheral gaze point D4, and the check mark 47e corresponds to the peripheral gaze point D5. However, if it is easy to confirm in any place (near the center or each divided area) of the grid chart 31v that the subject feels an abnormality, the check mark and the peripheral note The correspondence relationship with the viewpoint may be set as appropriate, and is not limited to the first embodiment.

In Example 1 described above, the shape of the cornea Ec of the eye E can be measured, but any other optical characteristic of the eye E different from the eye refractive power can be measured. What is necessary is just and it is not limited to above-mentioned Example 1. FIG.

In the first embodiment described above, the shape of the cornea Ec of the eye E can be measured, but the eye refractive power is measured, and the Amsler chart (grid chart 31v) is used as the main optical axis. Any target projection optical system (optometry apparatus) including a target presentation optical system (target projection optical system 31) to be presented to the eye E on O1 may be used, and is limited to the configuration of the first embodiment described above. is not.

Next, a subjective optometry apparatus 60 of Example 2 as another example of the optometry apparatus of the present invention will be described with reference to FIGS. The subjective optometry apparatus 60 of the second embodiment is another example of the optometry apparatus of the present invention, and performs subjective measurement (grid chart test) using the grid chart 31v (Amsler chart) of the present invention. It is something that can be done. In the subjective optometry apparatus 60 of the second embodiment, the subjective measurement (grid chart test) using the grid chart 31v (Amsler chart) to be executed is basically the same as the eye refractive power measurement apparatus 10 of the first embodiment. The same reference numerals are used for the same components and process parts, and detailed description thereof is omitted. In addition, the subjective optometry apparatus 60 can present a grid chart 31v (see FIGS. 4, 7, 12, etc.) as one of the targets 65 to the subject 101 (eye to be examined). The configuration of the grid chart 31v to be presented is the same as that of the eye refractive power measuring apparatus 10 of the first embodiment, and the same reference numerals are given to the same configuration and process parts, and detailed description thereof is omitted.

The subjective optometry apparatus 60 according to the second embodiment can execute the subjective measurement (grid chart test) using the grid chart 31v (Amsler chart) of the present invention as described above, and also when creating glasses. It can be used to determine the refractive power of the lens. As shown in FIG. 13, the subjective optometry apparatus 60 includes an optotype presenting unit 61, a correction mechanism unit 62, a controller 63, and an optometry table 64.

The visual target presenting unit 61 presents various visual targets 65 to the subject's eye of the subject 101, and is supported by the column 61a so that the height position can be changed. The target 65 is presented to the subject's eye for various visual function tests of the subject's eye, and the target 65 for subjective measurement is basically the eye refraction of the first embodiment. FIG. 13 shows an example in which a grid chart 31v (Amsler chart) is presented, which is equivalent to a chart as a subjective visual target provided in the force measuring device 10. The optotype presenting unit 61 is provided with a display screen 66 for displaying the optotype 65. On the display screen 66, as will be described later, each image including the target 65 is appropriately displayed under the control of the arithmetic control circuit 76 (see FIG. 16) (see FIGS. 17 and 18). These types can be selected by operating the controller 63.

The optometry table 64 is arranged between the optotype presenting unit 61 and the subject 101. The optometry table 64 can be placed with a controller 63. The optometry table 64 is provided with a support column 67 that can be expanded and contracted in the vertical direction, and a support arm 68 is rotatably provided on the support column 67. The support arm 68 is provided so as to extend in the horizontal direction from the upper part of the support column 67, and the correction mechanism 62 is attached to the horizontal portion.

The correction mechanism unit 62 is provided to correct the visual function of the subject's eye of the subject 101, and the subject 101 (the subject's eye) and the optotype presenting unit 61 are connected by the support 67 and the support arm 68. It can be arranged between them (see FIG. 19 and the like). The correction mechanism unit 62 includes a pair of phoropters 71 that are symmetrical on the left and right. Each phoropter 71 has a housing 71a that houses an optical member for correcting the visual function of the eye to be examined, and an optometry window 72 is provided in each housing 71a. The both optometry windows 72 are provided for the subject 101 to look into the optotype presenting unit 61 (its display screen 66) through the optical member accommodated in each phoropter 71. It corresponds to the left and right eye to be examined. The pair of phoropters 71 are adjustable in distance from each other, that is, can be moved closer to each other and separated from each other. For this reason, in the correction mechanism unit 62, the distance between the optical axes of the pair of optometry windows 72 can be matched to the distance between the pupils of the left and right eyes of the subject 101. Since the pair of phoropters 71 have a bilaterally symmetric structure, the structure is simply described as the phoropter 71 below.

In the phoropter 71, five rotary disks 73 (reference numerals 731 to 735 (see FIG. 14) when individually described) are provided in the housing 71a so as to be rotatable about the rotation shaft 73a. As shown in FIG. 14, each rotating disk 73 is provided with circular openings 73b at equal intervals in the circumferential direction, and gears 731G to 735G are provided on the outer peripheral portion of each rotating disk 73 (731 to 735). Is formed. Each of the gears 731G to 735G is engaged with a drive gear (not shown) that is rotationally driven by a pulse motor that is driven under the control of an arithmetic control circuit 76 (see FIG. 16) described later. Each rotating disk 73 is arranged in the optometry window 72 (see FIG. 13) by appropriately combining corrective lenses provided in each circular opening 73b.

In the rotating disk 731, a plurality of spherical power lenses (not shown) each having a different spherical power, for example, by 0.25 D, are fitted into the circular openings 73 b one by one. Further, in the rotating disk 732, a plurality of spherical power lenses (not shown) having different spherical powers 3D are fitted into the circular openings 73b one by one. Further, in the rotating disk 733, an astigmatic lens (not shown) is fitted into each circular opening 73b as an inspection optical element. In the rotating disk 734, a horizontal prism for horizontal oblique inspection, a vertical prism for vertical oblique inspection, and an inspection prism which is an inspection optical element for horizontal oblique inspection with different correction powers are provided in each circular opening 73b. , Is provided. The horizontal prism separates the presented target in the horizontal direction, and the vertical prism separates the presented target in the vertical direction. In the rotating disk 735, an inspection prism (optical member: inspection vertical prism), which is an inspection optical element for vertical oblique inspection with different correction powers, is formed in a plurality of circular openings 73b, or a linear strip formed by a Madox rod. A Madox rod lens or the like for oblique inspection by light is fitted and provided.

In addition, in each rotating disk 73, at least one circular opening 73b is made transparent for performing an optometry in a state where no correction force is applied. In each rotating disk 73 of the second embodiment, one circular opening 73b indicated by reference numeral 73bA is passed through. Further, in each rotary disk 73, a shielding plate 73c for preventing the subject 101 from visually recognizing each target 65 is provided in the circular opening 73b adjacent to the transparent circular opening 73bA.

Therefore, as shown in FIG. 13, the correction mechanism unit 62 appropriately drives the pulse motor under the control of an arithmetic control circuit 76 (see FIG. 16) described later in each phoropter 71 to rotate each rotary disk 73 appropriately. Thus, an appropriately selected correction lens is arranged in each optometry window 72. Thereby, in the correction mechanism part 62, the correction force by passing through each optometry window 72 can be adjusted. The arithmetic control circuit 76 adjusts the correction force in the correction mechanism unit 62 based on the operation performed by the controller 63.

The controller 63 is placed on the optometry table 64. As shown in FIG. 15, the controller 63 includes an operation unit 74 operated by the examiner 102 (see FIG. 13) and a display unit 75 that displays operation images indicating operation contents. In the controller 63, the lower edge 75a of the display unit 75 is rotatably attached to the edge 74a of the operation unit 74 via a shaft member.

The operation unit 74 is provided with various switches for operations such as setting and execution of inspection such as the dial 74b and the display changeover switch 74c. The dial 74b is used to select a correction lens to be disposed in the optometry window 72 of each phoropter 71. The display changeover switch 74c displays the display contents on the display unit 75 in a first display mode (see FIG. 17) for a distance inspection described later and a second display mode (see FIG. 18) for a near inspection described later. And switching). A mouse 74d is connected to the operation unit 74, and operations such as setting and execution of examinations can be performed as in the case of various switches.

The display unit 75 is provided with a display screen 75b for displaying details of operations performed on the operation unit 74, a target 65, data relating to an inspection, and the like. On the display screen 75b, a first display mode (see FIG. 17) for a distance inspection described later and a second display mode (see FIG. 18) for a near inspection described later are appropriately switched. Displayed. In the second embodiment, the display screen 75b has a touch panel function. By using the touch panel function, various symbols for various operations described later in the first display mode and the second display mode are used. Allows operation by touching.

The controller 63 includes an arithmetic control circuit 76 in addition to the operation unit 74 and the display unit 75 as shown in FIG. The arithmetic control circuit 76 includes a CPU 77 and a memory unit 78. The CPU 77 comprehensively controls each unit of the subjective optometry apparatus 60 by a program stored in the memory unit 78. The CPU 77 (the subjective optometry apparatus 60) is connected to the operation unit 74 and the display unit 75. When a signal based on the operation performed on the operation unit 74 is input, the display unit 75 (there The operation (display) of the display screen 75b) is controlled. The CPU 77 (a subjective optometry apparatus 60) is connected to the drive control unit of the optotype presenting unit 61 and the drive control unit (its pulse motor) of the correction mechanism unit 62, and the optotype presenting unit 61 and the correction mechanism unit. The operation of 62 is controlled. Further, the CPU 77 (a subjective optometry apparatus 60) is connected to a lens meter CL as an optical inspection apparatus as another optical inspection apparatus and an objective inspection apparatus RM, and measurement data from these other optical inspection apparatuses. Can be captured as optical characteristic data. In the measurement data, in addition to the optical characteristic data of the eye of the subject and the optical characteristic data of the spectacle lens, other data related to the examination, for example, the instrument ID, the subject ID, the name of the subject, Items such as data number and measurement time are also included.

The memory unit 78 includes various visual targets 65 used during a distance test for examining the visual function of the subject's eye in a far-viewed state (far vision state), and a near-viewed state (near vision state). The visual target data indicating each of the various visual targets 65 used in the near-field examination for examining the visual function of the eye to be examined in (1) is stored. Based on the target data, the CPU 77 displays various targets 65 in the target display unit 61 (display screen 66) and the display unit 75 (target display column 91 (see FIG. 18) described later on the display screen 75b). Is displayed as appropriate. The memory unit 78 stores operation image data indicating an operation image (including a first display mode (see FIG. 17) and a second display mode (see FIG. 18) described later). Further, the memory unit 78 includes lens data DL (see FIGS. 17 and 18) indicating refractive powers such as spherical power, astigmatism power, axial angle, horizontal prism amount, and vertical prism amount of each correction lens. , Is stored.

When the dial 74b (see FIG. 15) of the operation unit 74 is operated, the CPU 77 extracts lens data DL indicating the refractive power according to the operation position from the memory unit 78. Then, the CPU 77 sends a control signal indicating that the correcting lens having the refractive power indicated by the extracted lens data DL is arranged in the optometry window 72 (see FIG. 13) of each phoropter 71 to the drive control unit ( To the pulse motor). Thereby, in each phoropter 71 of the correction mechanism unit 62, a correction lens having a refractive power selected by operating the dial 74b is arranged in the optometry window 72. Further, the CPU 77 sends a signal indicating the lens data DL extracted from the memory unit 78 to the display unit 75 to display the lens data DL on the display screen 75b (see FIGS. 17 and 18).

Further, the CPU 77 performs an operation to switch the display mode of the display unit 75 between the first display mode and the second display mode on the display changeover switch 74c (see FIG. 15) of the operation unit 74. Then, operation image data corresponding to each display mode is extracted from the memory unit 78. Then, the CPU 77 sends a signal indicating the extracted operation image data of each display mode to the display unit 75, and displays an operation image corresponding to each display mode on the display screen 75b.

The first display mode is a distance test for inspecting the visual function of the subject's eye in the far vision state, that is, the visual displayed on the optotype presenting unit 61 (its display screen 66) via the correction mechanism unit 62. It is displayed on the display part 75 (the display screen 75b) when inspecting by looking at the mark 65 (see FIG. 13). In the first display mode, as shown in FIG. 17, an inspection type display field 81, an inspection details display field 82, a refractive power display field 83, a reference display field 84, and a list are displayed on the display unit 75 (its display screen 75b). A display field 85, a target display field 86, an operation symbol display field 87, a dial display field 88, and an interpupillary distance display field 89 are displayed. Each of these fields is stored in the memory unit 78 as image data. Each of these fields also functions as various symbols as icons that enable a selection (switching) operation by touching using the function of the touch panel on the display screen 75b (display unit 75). For this reason, when the CPU 77 (arithmetic control circuit 76) receives a detection signal touched by each column displayed on the display screen 75b from the display unit 75, it extracts data corresponding to the detection signal from the memory unit 78, A signal indicating the extracted data is appropriately sent to the display unit 75 and the optotype presenting unit 61.

The examination type display field 81 displays the name of the examination being executed. In the example shown in FIG. 17, the chart (target) is used in the sphericity test for the distance examination. The examination detailed content display field 82 displays the name of the detailed content of the examination, and in the example shown in FIG. 17, the character “right” indicating the right eye at the left end and the left eye at the right end. “Left” indicating that the data (measurement result) has been acquired by the distance measurement of subjective measurement in the middle.

The refractive power display field 83 includes lens data DL of the correction lens set by the correction mechanism unit 62 (each of the phoropters 71), that is, the spherical power, astigmatism power of the lens as an optical element set in each optometry window 72, and Displays optical characteristic data such as shaft angle. Since the correction lens is set by being selected by operating the dial 74b of the operation unit 74 as described above, the refractive power display field 83 displays the result of the operation performed on the dial 74b. It will be. Therefore, the CPU 77 (arithmetic control circuit 76) controls the correction mechanism unit 62 so that the optical element corresponding to the optical characteristic data displayed in the refractive power display field 83 is set in each optometry window 72. In the example shown in FIG. 17, the refractive power display field 83 displays items of spherical power, astigmatic power, axial angle, and addition of the refractive power of the lens as lens data DL, and the right eye of the subject 101. The numerical values of the optical characteristic data set in each optometry window 72 corresponding to the left eye and the left eye are displayed for each item.

The reference display field 84 displays optical characteristic data that can be compared with the optical characteristic data displayed in the refractive power display field 83, and is intended to make the work of the subjective examination by the examiner 102 more efficient. Provided. The reference display column 84 is provided on each of the left and right sides of the refractive power display column 83, and each displays various optical characteristic data corresponding to the right eye and the left eye of the subject 101. In the example shown in FIG. 17, the reference display column 84 on the left side displays measurement data taken from the objective test device RM (see FIG. 16). Is displayed below and each numerical value of the measured data is displayed for each item. In the example shown in FIG. 17, the reference display column 84 on the right side displays measurement data taken from the lens meter CL (see FIG. 16), and the characters “glasses” indicating the title of the measurement data are displayed on the upper row. It is displayed and the numerical values of the measurement data are displayed for each item below.

The list display field 85 displays a list of targets 65 that can be used in the subjective optometry apparatus 60, displays a display switching button for switching items to be displayed in the upper stage, and displays switching below the button. A list of visual targets 65 in the item selected by the button is displayed. In the example shown in FIG. 17, the display switching button includes characters “Chart 1” and “Chart 2” as items for displaying the list of targets 65 in order from the left side, and a view that requires automatic and manual operations. Characters “manual vs. automatic” as items for displaying a list of marks 65, places where nothing is set, and targets 65 used in a near vision examination for examining the visual function of the subject's eye in the near vision state "Nearly use" as an item for displaying a list of. In the example illustrated in FIG. 17, “Chart 1” that is the leftmost display switching button is selected, and a list of targets 65 in “Chart 1” is displayed below the “Chart 1”. In this list display field 85, when any one of the displayed lists of targets 65 is touched using the function of the touch panel, the touched target 65 is selected. The target display column 86 displays the target 65 selected in the list display column 85. In the example shown in FIG. 17, the selected VA chart is displayed. The CPU 77 (arithmetic control circuit 76) displays the target 65 selected in the list display field 85 and displayed in the target display field 86 on the display screen 66 of the target display unit 61. 61 is controlled (see FIG. 13 and the like).

The operation symbol display column 87 displays symbols for various operations, and is displayed at the bottom of the display screen 75b. In the operation symbol display field 87, in the example shown in FIG. 17, the letters “S: 0.25” as a step feed button for changing the lens power by 0.25 diopters in order from the left side, and the shielding plate are shown. Characters of “shielding plate” to be set on the optometry window 72, characters of “data display” to display various data, characters of “prescription: record” to record prescription data, awareness data, objective data, prescription Data, “preset data”, “data set” characters for setting data such as naked eye data, and the like are displayed. The dial display column 88 displays a dial image indicating the state of operation on the dial 74b (see FIG. 15) of the operation unit 74. The interpupillary distance display column 89 displays the distance between the optical axes of the pair of optometry windows 72 (see FIG. 13) that is the distance between the pupils of the left and right eyes of the subject 101.

Further, the second display mode is a visual target displayed on the display screen 75b (see FIG. 15) at the time of near vision examination for examining the visual function of the eye to be examined in the near vision state, that is, through the correction mechanism unit 62. It is displayed on the display part 75 (its display screen 75b) in order to see 65 and to perform an inspection. In the second display mode, as shown in FIG. 18, the display unit 75 (the display screen 75b) includes an optotype presenting column 91 for presenting the optotype 65 and a correction mechanism unit 62 (the respective phoropters 71). A refracting power display field 92 for displaying the lens data DL of the set correction lens is displayed. Each of these fields is stored in the memory unit 78 (see FIG. 16) as image data. The optotype presenting column 91 is a place where the optotype 65 is displayed to be shown to the subject 101 (examined eye) at the time of the near examination, and displays the optotype 65 selected for the near examination. .

The refractive power display column 92 displays the lens data DL of the correction lens set by the left and right phoropters 71 in the correction mechanism unit 62 separately on the left and right, and as an item indicating whether it corresponds to the left or right in the upper stage. “Right” and “Left” characters are displayed. Further, the refractive power display column 92 is provided with a location indicating which of the lens data DL is displayed below the item, and a location indicating data corresponding to the location. In the example shown in FIG. 18, the refractive power display column 92 includes, in order from the outside, each lens data DL, the addition (“addition” character), the axis angle (“axis” character), and the astigmatism power (“astigmatism”). ), Spherical power (character “spherical”), horizontal prism amount H (character “prism H”), and vertical prism amount V (character “prism V”). .

As described above, the CPU 77 (arithmetic control circuit 76) is configured to display each target 65 (grid) in the target display unit 61 (display screen 66) and the display unit 75 of the controller 63 (target display column 91 on the display screen 75b). Chart 31v and the like) can be presented. Presentation of each target 65 (grid chart 31v, etc.) is easy because the target display unit 61 (display screen 66) and the display unit 75 (display screen 75b) are formed by a display device such as a display. It can be carried out. For this reason, the subjective optometry apparatus 60 can present the selected target 65 (grid chart 31v (Amsler chart)) in the same manner as the eye refractive power measurement apparatus 10 of the first embodiment.

Next, with the subjective optometry apparatus 60, a distance test for inspecting the visual function of the eye to be examined in the far vision state and a near vision test for examining the visual function of the eye in the near vision state are performed. The situation and will be described. First, the examiner 102 operates the display changeover switch 74c (see FIG. 15) provided in the operation unit 74 to perform the distance inspection, thereby causing the display unit 75 (the display screen 75b) to be in the first display mode. Switch to. Then, the subjective optometry apparatus 60 displays the operation image (see FIG. 17) in the first display mode on the display screen 75b (display unit 75) under the control of the CPU 77 (arithmetic control circuit 76). Then, the examiner 102 selects the distance test target 65 used for the test from the list display field 85 in the operation image in the first display mode. Then, in the subjective optometry apparatus 60, under the control of the CPU 77 (arithmetic control circuit 76), the target display column 86 (see FIG. 17) of the display unit 75 and the display screen 66 of the target presentation unit 61 (see FIG. 13). And the selected visual target 65 is displayed on each of. Therefore, the examiner 102 visually recognizes the target 65 displayed in the target display column 86, so that the target 65 displayed in the display screen 66 and the target display column 86 becomes the selected target 65. It can be confirmed whether or not they match.

In this set state, in the subjective optometry apparatus 60, as shown in FIG. 19, the optotype 65 displayed on the display screen 66 of the optotype presenting unit 61 through each optometry window 72 of each phoropter 71 of the correction mechanism unit 62. To the subject 101. Here, after making the subject 101 (eye to be examined) look through each optometry window 72, the above-described various settings may be performed. Then, the examiner 102 asks the subject 101 about the appearance of the optotype 65, and operates the dial 74b of the operation unit 74 with a correction lens to be placed in each phoropter 71 (in each optometry window 72) based on the response. Switch with. At this time, since the lens data DL of the correction lens selected by operating the dial 74b is displayed in the refractive power display field 83 of the display unit 75, the examiner 102 operates the dial 74b while viewing the lens data DL. can do. By repeating this until the visual target 65 looks good, it is possible to determine the refractive power of the lens of the spectacles to be created that appropriately corrects the visual function of the eye to be examined. For this reason, the subjective optometry apparatus 60 can measure the eye refractive power of the eye to be examined (the refractive power of the lens of the glasses) in the distance vision state.

When examining the visual function of the subject's eye in the near vision state, the examiner 102 arranges the controller 63 in front of the subject 101 on the optometry table 64 as shown in FIG. The display screen 75b is made to face each phoropter 71. Then, the examiner 102 selects the near vision inspection target 65 to be used for the examination from the list display column 85 to perform the near vision examination, and presses the display changeover switch 74c (see FIG. 15) provided on the operation unit 74. By operating, the display unit 75 (the display screen 75b) is switched to the second display mode. Then, the subjective optometry apparatus 60 displays the operation image (see FIG. 18) in the second display mode on the display screen 75b (display unit 75) under the control of the CPU 77 (arithmetic control circuit 76). In the subjective optometry apparatus 60, under the control of the CPU 77 (arithmetic control circuit 76), the selected target 65 is displayed in the target display column 91 of the display unit 75 (display screen 75b) (see FIG. 18). ). At this time, the CPU 77 (arithmetic control circuit 76) calculates the distance between each phoropter 71 and the display screen 75b, and based on the distance, the size of the visual target 65 is the subject to be examined 101 (the eye to be examined). Is adjusted to a size corresponding to the visual acuity value and displayed on the display screen 75b.

In this setting state, the examiner 102 sees the visual target 65 displayed on the display unit 75 (display screen 75b) of the controller 63 through the optometry windows 72 of the phoropters 71 of the correction mechanism unit 62. Let Then, as in the distance examination, the examiner 102 asks the subject 101 about the appearance of the optotype 65 and, based on the response, arranges a correction lens to be placed in each phoropter 71 (in each optometry window 72). Switching is performed by operating the dial 74b of the operation unit 74. By repeating this until the visual target 65 looks good, it is possible to determine the refractive power of the lens of the spectacles to be created that appropriately corrects the visual function of the eye to be examined. Therefore, the subjective optometry apparatus 60 can measure the eye refractive power of the eye to be examined (the refractive power of the lens of the glasses) in the near vision state.

Further, the subjective optometry apparatus 60 can perform an oblique examination for measuring the oblique degree of the eye to be examined by using a polarizing plate, a red / green filter, and a liquid crystal filter. These various inspections are the same as in the past.

In addition, the subjective optometry apparatus 60 according to the second embodiment of the present invention can perform subjective measurement (grid chart test) using the grid chart 31v (Amsler chart). That is, in the subjective optometry apparatus 60, when performing a distance examination, the grid chart 31v (Amsler) as the target 65 is displayed on the display screen 66 of the target presenting unit 61 under the control of the CPU 77 (arithmetic control circuit 76). (Chart) is displayed. The presentation (display) of the grid chart 31v (Amsler chart) on the display screen 66 is performed by using a target light beam as a grid chart 31v (Amsler chart) whose display mode is positioned on the optical axis O2 in the target projection optical system 31. Is projected on the eye E and the grid chart 31v is presented (projected) to the eye E on the main optical axis O1, but only the target chart 61 (its display screen 66) presents it. Therefore, it can be performed in the same manner as in the first embodiment. For this reason, the optotype presenting unit 61 cooperates with the correction mechanism unit 62 to provide a grid chart 31v (Amsler chart) as a subjective chart that causes the eye E to be watched for subjective measurement. It functions as a presentation optical system.

In the subjective optometry apparatus 60, when performing a near-field examination, a grid as a target 65 is displayed in the target display column 91 of the display screen 75b of the display unit 75 under the control of the CPU 77 (calculation control circuit 76). Chart 31v (Amsler chart) is displayed. The display of the grid chart 31v (Amsler chart) on the display screen 75b (target presentation column 91) is a grid chart 31v (Amsler chart) in which the display mode is positioned on the optical axis O2 in the target projection optical system 31. The target luminous flux is projected onto the eye E and the grid chart 31v is presented (projected) on the eye E on the main optical axis O1, so that the display unit 75 (the display screen 75b (target display column 91)) Therefore, it can be carried out in the same manner as in the first embodiment. For this reason, the display unit 75 of the controller 63 cooperates with the correction mechanism unit 62 to present a grid chart 31v (Amsler chart) as a subjective visual target that causes the eye E to be watched for subjective measurement. It functions as a sign presentation optical system. Further, the CPU 77 (calculation control circuit 76) controls the presentation of the grid chart 31v (Amsler chart) (target 65) in the target presenting optical system (the target presenting unit 61, the display unit 75 of the controller 63). Function as.

In the subjective optometry apparatus 60 according to the second embodiment, the grid chart 31v (Amsler chart) is basically configured in the same manner as the eye refractive power measurement apparatus 10 according to the first embodiment. The same effect can be obtained.

In addition, in the subjective optometry apparatus 60, the grid chart 31v (Amsler chart) is displayed on the display screen 66 of the target presentation unit 61, or the grid in the target presentation column 91 of the display unit 75 (display screen 75b). The chart 31v (Amsler chart) is displayed under the control of the CPU 77 (arithmetic control circuit 76). Therefore, the subjective optometry apparatus 60 can perform subjective measurement using a grid chart 31v (Amsler chart) with a simple configuration, whether it is a distance test or a near test.

Therefore, the subjective optometry apparatus 60 of the second embodiment as another example of the optometry apparatus according to the present invention can easily and appropriately perform the subjective measurement using the Amsler chart.

In the second embodiment, an example of an image displayed on the display screen 75b in the first display mode (see FIG. 17) and the second display mode (see FIG. 18) is shown. It is only necessary to be displayed for the purpose inspection, and the latter may be displayed for the near purpose inspection, and is not limited to the above example.

In each of the above-described embodiments, the eye refractive power measurement device 10 as an embodiment of the eye refractive power measurement device (optometry device) according to the present invention has been described. However, on the main optical axis toward the fundus of the eye to be examined. A reflex measurement projection optical system for projecting measurement light, and a reflex measurement light reception optical system for receiving reflected light from the fundus of the measurement light passing through the main optical axis, and receiving light by the reflex measurement light reception optical system. An eye refractive power measurement device (optometry device) for measuring the eye refractive power of the subject's eye based on an Amsler chart composed of a lattice pattern as a subjective visual target that causes the subject to gaze for subjective measurement Any eye refractive power measurement device (optometry device) provided with a visual target presenting optical system to be presented to the eye to be examined on the main optical axis may be used, and the present invention is not limited to the above-described embodiments.

In each of the above-described embodiments, the eye refractive power measurement device 10 and the subjective optometry device 60 as examples of the optometry apparatus (eye refractive power measurement device) according to the present invention have been described. Optometry apparatus (eye) comprising an optotype presenting optical system for presenting an Amsler chart composed of a lattice pattern as a subjective target to be watched by a subject for subjective measurement. (Refractive power measuring device), and is not limited to the above-described embodiments.

Further, in each of the above-described embodiments, four peripheral gazing points (D2 to D5) are provided at the center position of each divided area obtained by dividing the grid chart 31v into four by the vertical and horizontal lines including the central gazing point D1 (center position). It was. However, each peripheral gaze point is a case where the grid chart 31v (Amsler chart) that can be shown to the eye E (subject) by the target projection optical system 31 by gazing at them is small. As long as it is possible to confirm whether or not there is a possibility of a disease in a larger range than the grid chart 31v actually shown, the position and the number to be provided may be set as appropriate. It is not limited to examples.

In each of the above-described embodiments, each gazing point (D1 to D5) is provided in advance in the grid chart 31v. However, if the above-described effects can be obtained, for example, each target projection optical system 31 is provided with each gazing point (D1 to D5). A plurality of light sources (LEDs, etc.) may be provided corresponding to the positions of the gazing points (D1 to D5), and the respective peripheral gazing points may be formed by the light sources, and the corners of the grid chart (lattice pattern) It may be formed by or other configurations, and is not limited to the above-described embodiments. At this time, it is desirable that each gaze point is easy for the examiner to guide as a fixation target, or easy for the subject to easily understand and gaze as the fixation target. Thus, when each gazing point (D1 to D5) is formed by each light source, when each check mark (47a to 47e (see FIG. 6)) of the grid auxiliary symbol 47 is touched, the corresponding light source is turned on and the other By providing a function for turning off the light source, it is possible to switch each gazing point (D1 to D5) as a fixation target by touching the check mark.

In each of the above-described embodiments, the eye E is presented with the grid chart 31v in which the grid pattern portion is white. However, if the grid chart 31v is to be presented to the eye E, for example, the color of the location of the grid pattern, such as presenting the location of the grid pattern as a red, green, or blue color as appropriate. It is good also as what can change suitably. This is because the eye refractive power measuring apparatus 10 includes a plurality of color correction filters corresponding to various colors as the color correction filter 31b in the target projection optical system 31, and among the color correction filters. This can be realized by adopting a configuration in which any one of the above can be positioned on the optical axis O2. Moreover, it can implement | achieve as what uses the light source which can be changed to the target light source 31a, and can radiate | emit the light (light beam) of various colors. Such a light source that emits light (luminous flux) of various colors can be realized by preparing a plurality of light sources and appropriately switching the light sources to be lit, and preparing red, green, and blue light sources. If so, light of many colors (light flux) can be emitted by appropriately combining them. In addition, in the case of the subjective optometry apparatus 60 described above, a liquid crystal display capable of color display is used as the optotype presenting unit 61 (display screen 66) and the display unit 75 (display screen 75b) of the controller 63. Can be realized. In this case, since the grid chart 31v (Amsler chart) can be shown to the eye E (subject) in various colors, for example, even if the reaction (how the subject feels) differs depending on the color It is possible to determine whether or not there is a possibility of a disease appropriately. That is, by showing the grid chart 31v (Amsler chart) of various colors to the eye E (subject), it is possible to confirm the difference in the response (how the subject feels) according to the color. In addition, by showing the grid chart 31v (Amsler chart) presented in the most highly visible color in the eye E (subject), it becomes possible to more accurately grasp the appearance felt by the subject, and more appropriately It can be determined whether or not there is a possibility of a disease.

In each of the above-described embodiments, the grid chart 31v (Amsler chart) is configured by arranging 20 grids (cells) in the vertical direction and the horizontal direction, respectively. If the above-mentioned objective measurement (grid chart test (Amsler chart test)) is possible, the size, the number of grids (the squares) and the overall shape should be set appropriately. What is necessary is just and it is not limited to each above-mentioned Example.

As mentioned above, although the eye refractive power measuring apparatus (optometry apparatus) of the present invention has been described based on each example, the specific configuration is not limited to each example, and unless departing from the gist of the present invention, Design changes and additions are allowed.
[Cross-reference to related applications]
This application claims priority based on Japanese Patent Application No. 2013-193234 filed with the Japan Patent Office on September 18, 2013, the entire disclosure of which is fully incorporated herein by reference.

10. Eye refractive power measurement device 31 (as an example of an eye refractive power measurement device and an optometry device) 31 Target projection optical system 31a (as an example of a target presentation optical system) Target light source 31u (As an example of another target) Scene chart 31v Grid chart (as an example of an Amsler chart) 32 Anterior eye observation optical system (as an example of an eye characteristic measurement light receiving optical system) 33 Ref measurement projection optical system 34 Ref measurement light receiving optical system 36 (Ocular characteristics) Keratring-shaped index projection light source 60 (as an example of a measurement projection optical system) 60 A subjective optometry apparatus (as an example of an optometry apparatus) 61 (As an example of a target presentation optical system) A target presentation unit 75 (Target presentation optics) Display unit (as an example of the system) D1 Central gazing point D2, D3, D4, D5 Peripheral gazing point E Eye to be examined Ef Fundus O1 Main optical axis Vf Field of view

Claims

A reflex measurement projection optical system that projects measurement light on the main optical axis toward the fundus of the eye to be examined; a reflex measurement light reception optical system that receives reflected light from the fundus of the measurement light passing through the main optical axis; An eye refractive power measuring device for measuring an eye refractive power of the eye based on light received by the reflex measurement light receiving optical system,
An eye having an optical system for presenting an amsler chart made of a lattice pattern as a subjective visual target to be gazed at a subject for subjective measurement on the subject's eye on the main optical axis Refractometer.
The visual target presenting optical system is characterized in that the Amsler chart is presented to the eye to be examined in a state equal to that provided at a position having a predetermined size and a predetermined distance from the eye to be examined. The eye refractive power measuring apparatus according to 1.
The optotype presenting optical system has a power suitable for viewing the Amsler chart at a distance in the subject's eye according to the eye refractive power of the subject's eye measured based on the light received by the reflex measurement light-receiving optical system. The eye refractive power measurement apparatus according to claim 1, wherein the eye refractive power measurement apparatus moves to a position suitable for viewing at or near a position.
The said optotype presenting optical system presents the Amsler chart to the eye to be examined within a range corresponding to the center of the retina in the eye to be examined. Eye refractive power measurement device.
5. The Amsler chart according to claim 1, wherein a central gazing point is provided at a central position, and a plurality of peripheral gazing points are provided around the central gazing point. The eye refractive power measuring apparatus according to Item 1.
6. The eye refraction according to claim 5, wherein each of the peripheral gazing points is provided at a peripheral portion of a visual field from the eye to be examined on the Amsler chart presented by the target presentation optical system. Force measuring device.
The Amsler chart has a square shape,
6. The peripheral gaze point is provided at each central position in four divided areas when the Amsler chart is divided into four by a vertical line and a horizontal line including the central gaze point. The eye refractive power measuring apparatus according to claim 6.
The said target | presentation optical system presents to the said to-be-examined eye the line segment which draws the grid | lattice-like pattern in the said Amsler chart as a predetermined color, The said any one of Claim 1-7 characterized by the above-mentioned. Eye refractive power measurement device.
The target presentation optical system has a target light source,
The said Amsler chart is formed with the member which permeate | transmits the light radiate | emitted from the said target light source in the said target presentation optical system, The any one of Claims 1-8 characterized by the above-mentioned. Eye refractive power measurement device.
The optotype presenting optical system has another optotype different from the Amsler chart, on the optical axis on which light emitted from the optotype light source travels by switching between the Amsler chart and the other optotype The eye refractive power measuring apparatus according to claim 9, wherein
The eye refractive power according to any one of claims 1 to 8, wherein the Amsler chart is formed by being displayed on a display screen of an image forming apparatus in the visual target presenting optical system. measuring device.
It is an eye refractive power measuring device according to any one of claims 1 to 11,
Further, an eye characteristic measurement projection optical system for projecting other measurement light for measuring other optical characteristics of the subject eye different from eye refractive power on the main optical axis toward the subject eye, and the main An eye refractive power measurement apparatus comprising: an eye characteristic measurement light receiving optical system that receives reflected light from the subject eye of the other measurement light passing through the optical axis.
An optometry apparatus for measuring eye refractive power of an eye to be examined,
An optometry apparatus, comprising: an optotype presenting optical system for presenting an Amsler chart having a lattice pattern as a subjective visual target to be gazed at a subject for subjective measurement.
The visual target presenting optical system is characterized in that the Amsler chart is presented to the eye to be examined in a state equal to that provided at a position having a predetermined size and a predetermined distance from the eye to be examined. The optometry apparatus according to 13.