JP6349885B2 - Ophthalmic equipment - Google Patents

Description

  The present invention relates to an ophthalmologic apparatus for inspecting an eye to be examined.

  In an ophthalmologic apparatus (for example, an auto reflex camera, a fundus camera, and a perimeter) that requires alignment with the eye to be examined, an electric joystick that electrically detects an operation of the joystick from the examiner and electrically drives the examination unit based on the detection result A mechanism has been proposed (see, for example, Patent Document 1).

  For example, in the apparatus of Patent Document 1, the inspection unit is finely moved according to the tilt angle of the joystick, and the inspection unit is coarsely moved according to the slide of the joystick.

JP 2006-130227 A

  However, in the case of the above-described conventional apparatus, since coarse movement and fine movement are performed by an operation on one joystick, there are some portions that are not intuitively understandable. Further, since the tilting mechanism of the joystick and the slide mechanism of the joystick are connected, there is a possibility that when the joystick is tilted, the slide mechanism is moved and coarse motion control is performed.

  In view of the above problems, an object of the present invention is to provide an ophthalmologic apparatus that can be easily aligned by an examiner.

  In order to solve the above problems, the present invention is characterized by having the following configuration.

(1) the base,
An optometry unit that is movably mounted on the base and inspects the eye to be examined;
Drive means for moving the optometry unit relative to the eye to be examined;
A joystick mechanism comprising: a joystick supported to be tiltable in an arbitrary direction; and first detection means for detecting a tilting operation on the joystick;
A second operation mechanism comprising: a second operation unit arranged to be slidable with respect to the base; and a second detection means for detecting a slide operation on the second operation unit;
The driving unit is controlled based on an operation signal output from the first detection unit, the optometry unit is moved, and the driving unit is controlled based on an operation signal output from the second detection unit. Drive control means for moving the optometry unit;
A bearing base that separately supports the joystick and the second operation unit;
And wherein the Bei example Rukoto a.

It is an external view which shows schematic structure of a present Example. It is the front view and side view of the ophthalmic examination apparatus of a present Example. It is a figure which shows an example of the measurement optical system used for an ophthalmic examination apparatus. It is a figure explaining the outline of an alignment operation part. It is the schematic for demonstrating a storage holder. It is the schematic for demonstrating arrangement | positioning of a storage holder. It is a control flowchart of a measurement operation. It is a figure for demonstrating the area set to the movement range of a measurement part. It is a figure which shows the fundus image observed. It is a graph regarding the light reception intensity | strength of an image pick-up element.

<Overview>
[Storage section]
Hereinafter, an outline of the first embodiment mainly relating to the storage unit will be described. The ophthalmic examination apparatus (hereinafter also referred to as this apparatus) 1 of the present embodiment can perform, for example, a visual field examination of a subject.

  The apparatus 1 mainly includes, for example, a storage portion 9 and a connecting portion (for example, a magnet member 2b). The storage unit 9 may store, for example, a response unit (for example, the response unit 5). For example, the connecting unit may removably connect the storage unit 9 to the housing 1 a of the ophthalmic examination apparatus 1. As a result, a load is applied to the storage unit 9 and damage is reduced.

  The response unit may include a housing unit gripped by the subject and a sensor for detecting a response operation by the subject. As the sensor, for example, a pressure sensor that detects a pressing operation by the subject, a direction detection sensor that detects an operation direction by the subject, and the like are used.

  The storage unit (holder) 9 may include a support unit for supporting the response unit, for example. More preferably, the support unit is formed so that the shape of the support part conforms to the housing shape of the response unit, thereby preventing the response unit from falling off.

  The housing 1 a of the ophthalmic examination apparatus 1 may include a base 2 and an apparatus main body movable with respect to the base 2. An inspection system (for example, the measurement unit 3) for inspecting the eye to be inspected may be arranged in the apparatus main body. For example, a connecting portion for detachably connecting the storage portion 9 may be provided on the base 2, and the connecting portion may removably connect the storage portion 9 to the base 2.

The storage unit 9 or the connecting unit may be provided with a magnetic unit (for example, a magnet member 2b). For example, the magnetic unit may generate magnetism between the housing 1 a and the storage unit 9. The storage unit 9 may be detachably connected to the housing 1a by a magnetic force generated by the magnetic unit.

  In addition, the accommodating part 9 may be connected with the housing 1a with a hook-and-loop fastener, for example.

  In addition, the accommodating part 9 may be connected in the state protruded with respect to the outer surface of the housing | casing 1a, for example. Accordingly, the examiner can easily store the response unit 5 in the storage unit 9.

The storage unit 9 may include a mounting unit 9a (see FIG. 6) that can mount the response unit in the horizontal direction. For example, mounting portion 9a in the longitudinal direction of the response unit may be placed on the response unit so that the transverse direction of the apparatus 1. Accordingly, the subject or the examiner can easily take out the response unit from the storage unit 9, for example.

  In addition, this apparatus 1 may be provided with a calculating part (for example, control part 80), the connection cord Cd, etc. For example, the calculation unit may obtain a test result based on a response signal from the response unit. For example, the connection code Cd may transmit a response signal from the response unit to the arithmetic unit. For example, the length of the connection cord Cd is preferably shorter than the height of the optometry table T on which the ophthalmic examination apparatus 1 is placed in order to inspect a subject in a sitting position. This reduces the response unit falling to the floor and being damaged.

  In addition, this apparatus 1 may provide the connection part 2a. For example, the connection unit 2a may be connected to the connection cord Cd. The connection part 2a may be provided on the subject side. Thus, for example, even when the connection cord Cd is short, the subject can easily handle the response unit.

[Operation mechanism]
The outline of the second embodiment related to the operation mechanism will be described below. In addition, the same number is attached | subjected and demonstrated to the structure similar to 1st Embodiment. An ophthalmologic apparatus (hereinafter also referred to as “this apparatus”) 1 according to the second embodiment inspects an eye E to be examined. The ophthalmologic apparatus 1 mainly includes a base 2, an optometry unit (for example, a measurement unit 3), a drive unit 6, a joystick mechanism 110, a second operation mechanism (for example, a coarse movement ring mechanism 120), and a drive control unit (for example, A control unit 80) and the like. The optometry unit inspects the eye E, for example. The drive unit 6 moves the optometry unit with respect to the eye E.

  The joystick mechanism 110 may include, for example, a joystick 111, a first detector (for example, an angle sensor 157), and the like. The joystick 111 may be supported so as to be tiltable in an arbitrary direction. The first detector may detect a tilting operation with respect to the joystick 111. The second operation mechanism may include, for example, a second operation unit (for example, ring member 121), a second detector (for example, angle sensor 158), and the like. The second operation unit may be arranged to be slidable (for example, horizontally moved) with respect to the base 2. The second detector may detect a slide operation on the second operation unit.

  For example, the drive control unit controls the drive unit 6 based on the operation signal output from the first detector, moves the optometry unit, and drives the drive unit based on the operation signal output from the second detector. 6 may be controlled to move the optometry unit. For example, the second operation unit may be arranged such that the second operation unit is moved independently of the movement of the joystick 111. Thereby, it is reduced that the examiner misses the operation of the optometry unit.

  The second operation unit may be arranged independently on the upper surface of the casing of the base 2. For example, the first detector or the second detector may be disposed in the casing of the base. The operation may be detected, for example, electrically or magnetically. The first detector may detect an operation amount, an operation position, or an operation speed of the joystick 111. The drive control unit may finely move the optometry unit based on the detection result.

  The second detector may detect the operation direction of the second operation unit. The drive control unit may coarsely move the optometry unit based on the detection result.

  The drive control unit may include, for example, a fine movement control unit (for example, the control unit 80) and a coarse movement control unit (for example, the control unit 80). For example, the fine movement control unit may finely move the optometry unit by driving the driving unit 6 according to the tilt angle of the joystick 111. For example, the coarse movement control unit may coarsely move the optometry unit by driving the drive unit 6 in accordance with the slide movement of the second operation unit. As a result, for example, when the joystick 111 and the second operation unit are operated independently, the examiner is reduced from operating by mistaken coarse movement and fine movement of the optometry unit.

  In addition, the 2nd operation part may be arrange | positioned at the opening part 121a (refer FIG. 4) which is formed in the base 2 and penetrates the joystick 111 so that a slide movement is possible. Thereby, for example, the joystick mechanism and the second operation mechanism can be operated independently and integrated. Accordingly, the entire space of the entire apparatus can be reduced. The second operation unit may be ring-shaped or U-shaped. As a result, the second operation unit can be integrated with the joystick 111. Note that the second operation unit may have a protruding portion (for example, a finger hook portion 122) protruding from the upper surface of the casing of the base.

[Control of moving speed]
The outline of the third embodiment relating to speed control will be described below. In addition, the same number is attached | subjected and demonstrated to the structure similar to 1st Embodiment or 2nd Embodiment. An ophthalmologic apparatus (hereinafter also referred to as “this apparatus”) 1 of the third embodiment inspects an eye E to be examined.

  The ophthalmologic apparatus 1 mainly includes a base 2, an optometry unit (for example, a measurement unit 3), a drive unit 6, a position detector (for example, a position sensor 7), a drive control unit (for example, a control unit 80), and the like. .

  The optometry unit may inspect the eye E, for example. For example, the driving unit 6 may move the optometry unit with respect to the subject. For example, the position detector may detect the position of the optometry unit on the base 2. The drive control unit may control the drive unit 6 to move the optometry unit relative to the subject. The drive control unit may change the movement speed of the optometry unit by the drive unit 6 according to the position of the optometry unit detected by the position detector when controlling the drive unit 6. Thereby, for example, the optometry unit can be moved smoothly without giving a sense of fear to the subject.

  Note that the present apparatus may further include an operation detector (for example, an angle sensor 158 or the like). The operation detector may detect an operation signal for an operation member (for example, the ring member 121) operated by the examiner. The drive control unit controls the drive unit 6 based on the operation signal output from the operation detector, and the position of the optometry unit detected by the position detector when the optometry unit is moved relative to the subject. The moving speed of the optometry unit by the drive unit 6 may be changed according to the above.

  The operation member for moving the optometry unit may be a touch panel in addition to the joystick 111. In the case of the joystick 111, for example, sensors (for example, angle sensors 157 and 158) that detect the movement of the operation unit moved by the examiner may be used as the operation detection sensor. In the case of a touch panel, the touch panel itself may be used as the operation detection unit. In this case, the movement of the optometry unit may be controlled based on the operation position on the touch panel.

  The position detection sensor may be an encoder, a potentiometer, or the like, or a drive amount of a motor that moves the optometry unit (for example, the number of pulses of a pulse motor).

  When changing the moving speed of the optometry unit, for example, when the optometry unit is in the first position close to the eye E, the drive control unit moves the optometry unit at a first speed that is low, and Is a second position far from the eye E (far from the first position), the optometry unit may be moved at a second speed that is faster than the first speed.

  Note that when the drive control unit controls the drive unit 6 based on the operation signal, the drive control unit changes the moving speed of the optometry unit by the drive unit 6 according to the position in the front-rear direction of the optometry unit detected by the position detector. May be. For example, at a position away from the subject, the lateral alignment of the optometry unit may be performed at a normal moving speed. Then, when the alignment in the horizontal direction is matched and the optometry unit is brought closer to the subject in the operation direction, the movement speed may be controlled to gradually decrease. Thereby, the horizontal alignment can be performed smoothly, and the feeling of fear given to the subject when the optometry unit is moved in the front-rear direction is reduced.

  Note that the drive control unit may gradually decrease the moving speed of the optometry unit by the drive unit 6 as the position of the optometry unit on the base 2 approaches the subject. For example, a plurality of control areas may be set in the movement range of the optometry unit. Then, when the optometry unit enters an area close to the subject, the movement speed of the optometry unit may be controlled to be slow. This can reduce the movement of the optometry unit slower than necessary. The drive control unit may continuously decrease the moving speed of the optometry unit.

  In addition, when the optometry unit is moved at the same position on the base 2, the drive control unit moves when moving forward toward the subject and when moving backward with respect to the subject. May be set to be at a constant speed. Thus, for example, it is possible to reduce the occurrence of an operation error due to a difference in moving speed between forward movement and backward movement.

  The drive control unit may change the coarse movement speed of the optometry unit by the drive unit 6 according to the position of the optometry unit detected by the position detector when the drive unit 6 performs the coarse movement of the optometry unit. .

  For example, when the operation detection unit detects that the operation is performed by the examiner as the coarse motion control of the optometry unit based on the operation signal, the drive control unit continues the optometry unit while the operation by the examiner continues. May be moved. Furthermore, the control unit may stop the movement of the optometry unit when there is no operation by the examiner.

  In addition, this apparatus 1 may be provided with the joystick mechanism 110, the 2nd operation mechanism (for example, coarse movement ring mechanism 120), etc. The joystick mechanism 110 may include, for example, a joystick 111, a first detector (for example, an angle sensor 157), and the like. The joystick 111 may be supported so as to be tiltable in an arbitrary direction. The first detector may detect a tilting operation with respect to the joystick 111. The second operation mechanism may include, for example, a second operation unit (for example, ring member 121), a second detector (for example, angle sensor 158), and the like. The second operation unit may be arranged to be slidable (for example, horizontally moved) with respect to the base 2. The second detector may detect a slide operation on the two operation units.

  The drive control unit may slightly move the optometry unit when controlling the drive unit 6 based on the operation signal output from the first detector. When the drive control unit controls the drive unit 6 based on the operation signal output from the second detection, the drive control unit may coarsely move the optometry unit at a moving speed changed according to the position of the optometry unit. . Note that the position of the optometry unit may be detected by, for example, a position detector. Thereby, for example, the examiner is reduced from giving fear to the subject when the optometry unit is roughly moved. Moreover, it is reduced that the operability of the joystick mechanism 110 is impaired when the optometry unit is finely moved.

<Example>
Hereinafter, the ophthalmologic apparatus of a present Example is demonstrated. The apparatus 1 is an apparatus for inspecting an eye to be examined. In this embodiment, an ophthalmologic apparatus that examines a subject's visual field will be described as an example. However, the present invention may be used in various ophthalmologic apparatuses such as an auto reflex, an intraocular pressure measuring device, a fundus camera, an axial length measuring device, and an optical coherence tomography.

  The apparatus 1 mainly includes, for example, a base 2, a measurement unit 3 (for example, a visual field measurement unit), a control unit 80, and an operation unit 100 (see FIGS. 1 and 2). Further, the device 1 may include a display unit 4, a response unit 5, and the like. Each configuration will be described in turn.

<Base>
The base 2 supports, for example, the entire apparatus. For example, the base 2 is installed on the optometry table T. The base 2 is provided with a drive unit 6, a position sensor 7, a face support unit 8, a storage unit 9, and the like. The drive unit 7 drives the measurement unit 3 in a three-dimensional direction. The position sensor 7 detects the reference position of the measurement unit 3. The face support unit 8 supports the subject's chin or forehead and the like. The storage unit 9 is provided, for example, on the base 2 and stores the response unit 5.

<Measurement unit>
The measuring unit 3 measures the visual function of the subject. The measurement unit 3 is provided with a measurement optical system 300 (see FIG. 3).

  The measurement optical system 300 of this embodiment mainly includes, for example, an illumination optical system 10, an observation / imaging optical system 30, a focus target projection optical system 40, and a target presentation optical system 70. The observation / photographing optical system 30 observes / photographs the fundus, anterior eye portion, and the like. The focus target projection optical system 40 projects a focus index (focus index) on the fundus. The optotype presenting optical system 70 presents a fixation target that guides the line of sight of the patient's eye E and various inspection targets.

[Illumination optics]
The illumination optical system 10 includes a photographing illumination optical system and an observation illumination optical system. The photographing illumination optical system may include a photographing light source 14, a condenser lens 15, a ring slit 17, a relay lens 18, a mirror 19, a black spot plate 20, a relay lens 21, a perforated mirror 22, an objective lens 25, and the like. The imaging light source 14 emits a visible light beam. The ring slit 17 has a ring-shaped opening. The black spot plate 20 has a black spot at the center. The observation illumination optical system mainly includes an illumination light source 11, an infrared filter 12, a condenser lens 13, a dichroic mirror 16, an optical system from the ring slit 17 to the perforated mirror 22, and an objective lens 25. The illumination light source 11 irradiates a light beam of near infrared light. The infrared filter 12 transmits near infrared light. The dichroic mirror 16 is disposed between the condenser lens 13 and the ring slit 17.

[Observation / Shooting Optical System]
The observation / photographing optical system 30 includes a fundus observation optical system, a fundus photographing optical system, and an anterior ocular segment observation optical system. The fundus oculi observation optical system mainly includes an objective lens 25, a photographing aperture 31, a focusing lens 32, an imaging lens 33, an insertion / removal optical member 34, and the like. The photographing aperture 31 is located in the vicinity of the aperture of the perforated mirror 22. The focusing lens 32 is movable in the optical axis direction. A dichroic mirror 37, a relay lens 36, and a two-dimensional image sensor 38 having infrared light reflection / visible light transmission characteristics are disposed in the optical path in the reflection direction of the insertion / removal optical member 34. The two-dimensional image sensor 38 has sensitivity in the infrared region. The image sensor 38 captures a fundus image of the fundus illuminated by an infrared light source. The insertion / removal optical member 34 is inserted into the optical path by the insertion / removal mechanism 39 when the fundus is observed, and is removed from the optical path when the fundus is photographed.

  The fundus photographing optical system shares the objective lens 25 and the optical system from the photographing aperture 31 to the imaging lens 33 with the fundus observation optical system. The fundus photographing optical system includes a photographing two-dimensional image sensor 35 having sensitivity in the visible range, and the fundus image illuminated by the photographing light source 14 is photographed by the image sensor 35. The photographing aperture 31 is placed at a position substantially conjugate with the pupil of the eye E. The focusing lens 32 is moved along the optical axis by a moving mechanism 49 including a motor.

  With the above configuration, when observing the fundus, the luminous flux emitted from the illumination light source 11 is once converged near the pupil of the eye E by the objective lens 25 and then diffused to illuminate the fundus. Reflected light from the fundus is imaged through the objective lens 25, the aperture of the perforated mirror 22, the imaging aperture 31, the focusing lens 32, the imaging lens 33, the insertion / removal optical member 34, the dichroic mirror 37, and the relay lens 36. An image is formed on the element 38. At the time of photographing the fundus, the reflected light from the fundus illuminated by the photographing light source 14 passes through the objective lens 25, the aperture of the perforated mirror 22, the photographing aperture 31, the focusing lens 32, and the imaging lens 33 to the two-dimensional imaging device 35. Form an image.

  The anterior ocular segment observation optical system includes a light source 35a, a light source 35b, an objective lens 25, an anterior ocular segment observation auxiliary lens (hereinafter abbreviated as an auxiliary lens) 26, and an optical system from the perforated mirror 22 to the image sensor 38. Share with the system. The light source 35a and the light source 35b may emit infrared light. The infrared light sources 35a and 35b may project a finite index (rectangular index extending in a direction perpendicular to the patient's eye) by a divergent light beam at a predetermined projection angle toward the cornea of the eye E. That is, the entire anterior segment is illuminated by the light sources 35a and 35b, and the alignment state of the eye E and the measurement unit 3 in the three-dimensional direction is shown.

  The auxiliary lens 26 is inserted into and removed from the optical path by driving the drive unit 26a. When the auxiliary lens 26 is placed on the optical axis L1, the anterior segment and the image sensor 38 are in a substantially conjugate relationship. That is, at the time of observing the anterior eye part, the anterior eye part imaged by the imaging element 38 with the auxiliary lens 26 placed on the optical axis L 1 is displayed on the display unit 4. On the other hand, at the time of fundus observation, the auxiliary lens 26 is retracted from the optical path by driving the drive unit 26 a, the imaging element 38 and the fundus are in a substantially conjugate relationship, and the photographed fundus image is displayed on the display unit 4.

  In the present embodiment, the point light source 27 is provided in the vicinity of the aperture of the perforated mirror (substantially conjugate position of the fundus), and the working light W formed on the fundus is formed by turning on the point light source 27 during fundus observation. Alignment in the working distance direction is performed.

[Focus index projection optical system]
The focus index projection optical system 40 includes an infrared light source 41, a slit index plate 42, a deflection prism 43, a lever 45, a spot mirror 44, a rotary solenoid 46, and a projection lens 47.

  Two declination prisms 43 were attached to the slit indicator plate 42. The lever 45 is provided obliquely in the optical path of the illumination optical system 10. The spot mirror 44 is attached to the lever 45 and placed at a conjugate position of the fundus.

  The lever 45 is placed on the optical axis, and the spot mirror 44 is attached to the tip of the lever 45 so as to be placed at a position avoiding the optical axis. As a result, during observation of the fundus, the reflected light from the spot mirror 44 is projected to a position on the fundus that avoids the optical axis L1.

  The light flux of the slit indicator plate 42 is separated by the declination prism 43, reflected by the spot mirror 44 via the projection lens 47, and projected onto the fundus via the relay lens 21, the perforated mirror 22 and the objective lens 25. . When the fundus is out of focus, the index images (focus indices S1, S2) on the slit index plate 42 are not conjugated to the fundus and are projected separately on the fundus. In this case, the focusing lens 32 and the focus target projection optical system 40 are moved in the optical axis direction in conjunction with the drive of the drive mechanism 49 based on the detection result of the separation state of the focus targets S1 and S2. On the other hand, when the fundus is in focus, the focus indices S1 and S2 are in conjugate positions with the fundus. When fundus photographing is performed in a focused state, the lever 45 is retracted from the optical path by the rotation of the shaft of the rotary solenoid 46.

[Optical display system]
The optotype presenting optical system 70 has an optotype presenting unit 71, for example. The optotype presenting unit shares the objective lens 25 to the insertion / removal optical member 34 of the observation / imaging optical system 30. For example, a mechanism described in Japanese Patent Laid-Open No. 2003-172974 may be applied to the optotype presenting unit 71.

<Control unit>
The control unit 80 controls driving of each driving unit of the apparatus 1. The control unit 80 includes a CPU 81, a storage unit 82 such as a ROM / RAM, a non-volatile memory (not shown), and the like. The CPU 81 manages various controls of the ophthalmic laser surgical apparatus 1. The storage unit 82 stores various programs, initial values, and temporary information.

  Although not shown, the control unit 80 includes buttons for the display unit 4, the response unit 5, the drive unit 6, the position sensor 7, the light sources of the measurement light optical system 300, the image sensors, the drive units, and the operation unit 100. , Angle sensor 157, angle sensor 158, etc. may be connected.

<Operation unit>
For example, the operation unit 100 receives an operation from the examiner and transmits an operation signal to the control unit 80. As shown in FIG. 1B, the operation unit 100 includes, for example, an alignment operation unit 101, various dials 102, various buttons 103, and the like.

<Alignment operation unit>
The alignment operation unit 101 transmits an operation signal for driving the measurement unit 3 to the control unit 80 based on the operation signal from the examiner. The alignment operation unit 101 may include, for example, a joystick mechanism (fine movement operation mechanism) 110, a coarse movement ring mechanism (coarse movement operation mechanism) 120, and the like. The joystick mechanism 110 and the coarse movement ring mechanism 120 output a signal for controlling the drive unit 7 based on an operation from the examiner. The joystick mechanism 110 is mainly used for operating the fine movement operation of the measurement unit 3. The fine movement operation is, for example, an operation of finely moving the measurement unit 3 with respect to the eye to be examined. The coarse movement ring mechanism 120 is mainly used for operating the coarse movement operation of the measurement unit 3. The coarse movement operation is, for example, an operation that moves the measurement unit 3 with respect to the eye to be examined. The alignment operation unit 101 of this embodiment includes a joystick mechanism 110 for fine movement operation of the measurement unit 3 and a coarse movement ring mechanism 120 for coarse movement operation, and can operate coarse movement and fine movement independently. . As a result, the examiner is reduced from operating the coarse movement and the fine movement incorrectly.

[Joystick]
The alignment operation unit 101 will be described in detail with reference to FIG. 4A is a perspective view of the alignment operation unit 101 viewed from the examiner side, FIG. 4B is a perspective view of the alignment operation unit 101 viewed from the subject side, and FIG. It is sectional drawing of the alignment operation part 101 seen from the person side (XI direction of FIG. 4a). The joystick mechanism 110 may include, for example, a joystick 111, a measurement start button 112, a rotary dial 113, an operation shaft 114, and the like. The measurement start button 112 and the rotary dial 113 may be provided on the joystick 111. When the measurement start button 112 is pressed by the examiner, the operation unit 100 outputs a signal for starting various eye measurements. When the examiner operates the rotary dial 113, the operation unit 100 outputs a signal for driving the measurement unit 3 in the Y-axis direction. The operation shaft 114 may be formed with a spherical portion 115, a spherical portion 116, and the like. The spherical portion 115 is held by a bearing unit 150 described later. Thus, the joystick 111 is held by the bearing unit 150 so as to be tiltable.

[Coarse adjustment ring]
The coarse ring mechanism 120 includes a ring member 121, for example. The ring member 121 may be formed with a finger hook portion 122, a connecting portion 123, and the like. The finger hook portion 122 has a shape protruding in a mountain shape so that the examiner can easily operate with a finger. The connecting portion 123 may be connected to a bearing unit 150 described later. The ring member 121 may be slidably held by a bearing unit 150 described later.

[Bearing unit]
The bearing unit 150 holds, for example, the joystick mechanism 110 and the coarse movement ring mechanism 120, and detects the tilt angle of the joystick 111 and the movement of the ring member 121. Hereinafter, an example of the bearing unit 150 will be described in detail.

  The bearing unit 150 includes, for example, a first base 151, a first base 152, a ball bearing 153, a moving member 154, a moving plate 155, a moving plate 156, an angle sensor 157, an angle sensor 158, and the like (FIG. 4). reference). The bearing unit 150 may include a support portion 159, a support portion 160, a guide plate 169, a guide plate 174, a slide receiving portion 163, and the like.

  The first base 151 is a base for the entire bearing unit 150. The support part 159 and the support part 160 are fixed to the first base 151. The support part 159 and the support part 160 support the first base 152. The first base 152 holds a ball bearing 153, a sliding receiving portion 163, and the like. The ball bearing 153 slidably holds the spherical portion 115 formed on the operation shaft 114. The sliding receiving portion 163 holds the moving member 154 so as to be slidable. The moving member 154 is engaged with a spherical portion 116 formed on the operation shaft 114. The moving plate 155 is fixed to the moving member 154. The moving plate 155 is moved together with the moving member 154. A bearing portion 164 is fixed to the moving plate 155. The bearing portion 164 is connected to the angle sensor 157. The angle sensor 157 fixed to the first base 151 includes a sensor shaft 165. A spherical axis 166 is fixed to the end of the sensor axis 165. The spherical shaft 166 is held by the bearing portion 164. The angle sensor 157 outputs a voltage corresponding to the tilt angle of the sensor shaft 165. In addition, as a structure of the angle sensor 157 and the angle sensor 158 mentioned later, you may use the structure of Unexamined-Japanese-Patent No. 2014-002595, for example.

  The support portion 159 and the support portion 160 are provided with a guide shaft 167 and a guide shaft 168, respectively. The guide shaft 167 and the guide shaft 168 extend in the same direction (for example, the X direction). The guide plate 169 is provided with a guide shaft 167 and a bearing hole 170 and a bearing hole 171 for inserting the guide shaft 168. That is, the guide plate 169 is movable with respect to the first base 151 in the direction in which the guide shaft 167 and the guide shaft 168 extend (for example, the X direction). The guide plate 169 is provided with a guide shaft 172 and a guide shaft 173. For example, the guide shaft 172 and the guide shaft 173 extend in a direction perpendicular to the guide shaft 167 and the guide shaft 168 (for example, the Z-axis direction). The guide plate 174 is provided with a bearing hole 175 and a bearing hole 176 for inserting the guide shaft 172 and the guide shaft 173. That is, the guide plate 174 is movable with respect to the guide plate 169 in the direction in which the guide shaft 172 and the guide shaft 173 extend (for example, the Z direction). Further, the guide plate 174 is movable together with the guide plate 169 in the direction (for example, the X direction) in which the guide shaft 167 and the guide shaft 168 extend with respect to the first base 151. Therefore, the guide plate 174 can move two-dimensionally (ZX direction). A moving plate 156 is fixed to the guide plate 174. Therefore, the moving plate 156 can be moved two-dimensionally (ZX direction) similarly to the guide plate 174. Further, the ring member 121 is fixed to the moving plate 156. Thereby, the ring member 121 is moved two-dimensionally (ZX direction) together with the moving plate 156. A bearing portion 177 is fixed to the guide plate 174. The bearing portion 177 is connected to the angle sensor 158. The angle sensor 158 fixed to the first base 151 includes a sensor shaft 178. A spherical shaft 179 is fixed to the end of the sensor shaft 178. The spherical shaft 179 is held by the bearing portion 177. The angle sensor 158 outputs a voltage corresponding to the tilt angle of the sensor shaft 178.

  As described above, the joystick 111 and the ring member 121 are separately supported with respect to the bearing base. As a result, the joystick 111 and the ring member 121 are individually tilted and moved. That is, the joystick 111 does not tilt in conjunction with the movement of the ring member 121. The ring member 121 does not move in conjunction with the tilt of the joystick 111.

[Joystick tilt detection]
An operation in which the bearing unit 150 detects the tilt of the joystick 111 will be described. For example, assume that the joystick 111 is tilted by the examiner. When the joystick 111 is tilted, the operation shaft 114 is tilted. The operation shaft 114 tilts with the center of the spherical portion 115 as the center of rotation. When the operation shaft 114 is tilted, the position of the spherical portion 116 moves. When the position of the spherical portion 116 is moved, the moving member 154 engaged therewith is moved together with the spherical portion 116. When the moving member 154 is moved, the moving plate 155 fixed to the moving member 154 is moved. When the moving plate 155 is moved, the bearing portion 164 fixed thereto is moved. When the bearing portion 164 is moved, the sensor shaft 165 held by the bearing portion 164 is tilted.

  When the sensor shaft 165 is tilted, the angle sensor 157 outputs, for example, a voltage corresponding to the tilt angle of the sensor shaft 165 to the control unit 80. For example, the control unit 80 may detect the tilt of the sensor shaft 165 based on the voltage value acquired from the angle sensor 157. Based on the voltage value acquired from the angle sensor 157, the control unit 80 may detect the tilt of the operation shaft 114 that is linked to the sensor shaft 165, that is, the joystick 111. Furthermore, the control unit 80 may calculate the tilt angle of the operation shaft 114, that is, the joystick 111, according to the acquired voltage value.

[Movement detection of ring member]
Next, an operation in which the bearing unit 150 detects an operation on the ring member 121 will be described. For example, assume that the ring member 121 is moved by the examiner. When the ring member 121 is moved, the moving plate 156 fixed thereto is moved. When the moving plate 156 is moved, the guide plate 174 fixed thereto is moved. When the guide plate 174 is moved, the bearing portion 177 fixed to the guide plate 174 is moved. When the bearing portion 177 is moved, the sensor shaft 178 held by the bearing portion 177 is tilted.

  When the sensor shaft 178 is tilted, the angle sensor 158 outputs a voltage corresponding to the tilt angle of the sensor shaft 178 to the control unit 80, similarly to the angle sensor 157. For example, the control unit 80 may detect the tilt of the sensor shaft 178 based on the voltage value acquired from the angle sensor 158. The control unit 80 may detect the movement of the ring member 121 interlocked with the sensor shaft 178 based on the voltage value acquired from the angle sensor 158. Furthermore, the control unit 80 may calculate the amount of movement of the ring member 121 according to the acquired voltage value.

  In the coarse movement ring mechanism 120 of the present embodiment, the measurement unit 3 cannot be operated obliquely. For example, even if the ring member 121 is moved obliquely in the ZX direction, the measuring unit 3 does not move. For example, the angle sensor 158 may be configured not to detect an oblique movement. Further, for example, the control unit 80 may be configured not to drive the driving unit 7 even if the movement of the ring member 121 in the oblique direction is detected. In other words, in the present embodiment, the measuring unit 3 moves roughly only in the cross direction (for example, the Z-axis direction and the X-axis direction). Thereby, for example, the examiner rarely moves the measuring unit 3 in an unintended direction due to an operation error. For example, when alignment in the Z-axis direction is performed in a state where there is alignment in the X direction, moving the measurement unit 3 in the X direction due to an operation error of the ring member 121 is reduced.

  As in the present embodiment, the alignment operation unit 101 may include a configuration in which the coarse motion operation mechanism and the fine motion operation mechanism are independent as described above. According to the configuration of the present embodiment, the examiner operates different operation members depending on whether the measurement unit 3 is coarsely moved or finely moved. Thereby, for example, when the examiner tries to finely move the measuring unit 3, the erroneous movement of the measuring unit 3 is reduced. Therefore, it is possible to reduce the measurement unit 3 from moving greatly due to an operator's operation mistake and causing a significant shift in alignment. In addition, an operation error that the measuring unit 3 coarsely moves in a state where the measuring unit 3 and the eye to be inspected are reduced is reduced. Thereby, the possibility that the measurement unit 3 contacts the eye to be examined can be reduced.

  Since the coarse operation mechanism and the fine operation mechanism are independent as in the present embodiment, the examiner can perform the alignment operation with both hands. As a result, it is possible to reduce mistakes in the coarse motion and fine motion operations.

  In addition, it becomes possible to operate the measurement part 3 intuitively by using the ring member 121 which can move back and forth and right and left like a present Example. Thus, the examiner can operate the electric alignment mechanism as if using a conventional mechanical alignment mechanism. For reference, when a conventional mechanical alignment mechanism is used, for example, the examiner moves the moving table with one hand relative to the base 2 to perform coarse movement of the measuring unit 3. Further, the mechanical joystick is operated with the other hand to finely move the measuring unit 3. When using a configuration in which the coarse motion operating mechanism and the fine motion operating mechanism are independent as in the present embodiment, the examiner performs the alignment operation by operating the electric alignment mechanism with both hands, similar to the operation of the mechanical alignment mechanism. be able to.

  When operating with both hands, for example, the examiner operates the ring member 121 with the left hand, and roughly moves the measuring unit 3 to a position where the eye to be examined can be observed with the image sensor 35. When the eye to be examined can be observed, the examiner operates the joystick 111 with the right hand to finely move the measuring unit 3 to a measurable position.

  The joystick mechanism 110 is not limited to the above configuration. For example, as described in JP 2012-179110 A, a configuration using an encoder or the like may be used.

<Response section>
The response unit 5 (for example, a response unit such as a response button or a response switch) receives the response of the subject and sends a response signal to the control unit 80. For example, the control unit 80 can determine from the response signal from the response unit 5 that the subject has visually recognized the inspection target. As shown in FIG. 5, the response unit 5 is stored in a storage unit 9 (for example, a storage holder) provided in the base 2. The response unit 5 may be connected to the control unit 80 by the code Cd or may be connected wirelessly.

  In this embodiment, for example, the response unit 5 has an elliptical shape, and a cord Cd is connected in the longitudinal direction. This cord Cd is connected to the connection portion 2a of the apparatus.

  The code Cd is preferably as short as necessary. As a result, it is possible to prevent the response unit 5 from being damaged by the impact of dropping on the floor. For example, the code Cd is preferably shorter than the height of the optometry table T. The height of the optometry table T is generally 600 to 900 mm, for example. For example, the standard value may be 700 mm.

  Note that a curl code may be used as the code Cd of this embodiment. The curled cord is a cord that is wound in a spiral shape, and is elastic. In this case, the curl cord may be extended when the response unit 5 is used, and the curl cord may be shortened when stored. In this way, by using the curl cord for the connection between the control unit 80 and the response unit 5, it is not necessary to lengthen the cord carelessly.

  The control unit 80 and the response unit 5 may be connected by a code Cd as in the present embodiment, or may be communicable wirelessly.

<Storage section>
The storage unit 9 stores the response unit 5. For example, the storage unit 9 may be installed in the device 1 and the response unit 5 may be stored in the device 1 integrally. As a result, the examiner can move the response unit 5 and the device 1 together.

  In addition, the accommodating part 9 may be provided so that it may protrude with respect to the outer surface of an apparatus. This makes it easy to store the response unit 5. Conversely, for example, when the storage unit 9 is provided inside the outer surface of the apparatus, it is difficult to store the response unit 5 and is troublesome.

  For example, as illustrated in FIG. 2A, the storage portion 9 may have a shape that protrudes outward with respect to the base 2. Accordingly, when the response unit 5 is stored, other members of the apparatus do not get in the way, and the response unit 5 can be stored in the storage unit 9 smoothly.

  In the present embodiment, for example, the storage portion 9 is detachably provided on the base 2 (see FIG. 6). For this reason, for example, the storage unit 9 can be removed in advance when the apparatus is transported. Therefore, it can prevent that the accommodating part 9 contacts a person and a wall, and is damaged.

  Furthermore, the storage unit 9 may be detached from the base 2 when a load is applied from the outside. For example, in the case of a present Example, the accommodating part 9 may be fixed with the base 2 and magnetic force. Accordingly, when a force larger than the magnetic force generated between the base 2 and the storage portion 9 is applied from the outside, the storage portion 9 is detached from the base 2. For example, by setting the magnetic force for fixing the storage unit 9 to be smaller than the strength of the storage unit 9, the storage unit 9 may be detached from the base 2 before the storage unit 9 is damaged by an external force.

  For example, the storage portion 9 of the present embodiment is fixed to the base 2 with a magnetic force. For example, a magnet member 2b that generates a magnetic field (for example, a magnet body such as a magnet or an electromagnet) is fixed to the base 2, and at least one of the magnet body and the ferromagnetic body is used for at least a part of the storage portion 9. It is done. Accordingly, the storage portion 9 is detachably fixed to the base 2 by an attractive force generated between the magnet member 2b of the base 2 and the ferromagnetic body of the storage portion 9. Of course, the magnet portion 2b may be provided in the storage portion 9, and the base 2 may be provided with a ferromagnetic material.

  In addition, in the above description, although it demonstrated that the accommodating part 9 was fixed to the base 2 with magnetic force using a magnet or an electromagnet etc., it is not restricted to this. For example, you may use the fastener (for example, snap button) of the shape which mutually fits. For example, a hook-and-loop fastener or the like may be used.

  In addition, the accommodating part 9 may hook the hook provided in one side in the other groove | channel, and may fix the accommodating part 9 and the base 2 so that attachment or detachment is possible. In this case, the storage portion 9 can be removed from the base 2 by removing the hook from the groove. Further, for example, the storage portion 9 and the base 2 may be detachably fixed by sliding the other in a groove formed in one. In this case, the storage portion 9 can be detached from the base 2 by sliding the storage portion 9 relative to the base 2.

  The storage unit 9 may be arranged so that the longitudinal direction of the storage unit 9 is in the horizontal direction (lateral direction). Furthermore, it is more preferable that the opening of the storage unit 9 faces the subject. Thus, the subject can easily take out and store the response unit 5.

  The storage unit 9 may be provided so that the response unit 5 can be stored in a state where the cord Cd connecting the response unit 5 and the device extends in the direction of the connection unit connected to the device. Thereby, the length of the code Cd can be shortened.

  For example, the storage unit 9 may be provided in the apparatus so that the cord Cd connected to the response unit 5 can be stored in a state extending in the lateral direction. For example, in this embodiment, the storage unit 9 may be provided so that the response unit 5 can be stored in a state where the longitudinal direction of the response unit 5 is the horizontal direction (lateral direction) of the apparatus. Accordingly, when the response unit 5 is stored in the storage unit 9, the distance between the connection portions of the cord Cd between the device and the response unit 5 is shortened, and the code Cd can be shortened.

  In addition, by extending the cord Cd in the horizontal direction, it is not necessary to worry about the cord Cd during storage. For example, by taking out the code Cd from the storage opening side of the storage unit 9, it is possible to reduce the obstacle of the code Cd during storage. For example, it is not necessary to pass the cord Cd through the slit of the storage unit 9, and storage is easy. Further, since an excessive burden is not applied to the cord Cd, the durability of the cord Cd is not impaired.

  For example, when the response unit 5 is stored in the storage unit 9 with the code Cd extending downward, the code Cd becomes an obstacle when stored. For example, it is necessary to pass the code Cd through a slit provided in the storage unit 9, which increases the trouble of storage.

  In addition, in the above description, although the accommodating part 9 was connected with the base 2, it is not restricted to this. If it is an apparatus main body, the accommodating part 9 may be connected anywhere.

<Inspection procedure and operation>
Hereinafter, an inspection procedure using the apparatus 1 will be described along with the operation of the apparatus 1. First, the examiner takes out the response unit 5 from the storage unit 9 and holds it to the subject. Then, the examiner instructs the subject to place the chin on the chin stand and to apply the forehead to the forehead. Thereafter, alignment and measurement operations of the measurement unit 3 are performed.

[Alignment operation of measuring unit 3]
The apparatus 1 limits the moving speed of the measurement unit 3 in the alignment operation. For example, the control unit 80 controls the driving so that the upper limit of the moving speed of the measuring unit 3 becomes smaller as the measuring unit 3 approaches the subject. Thereby, the examiner can perform alignment with a more stable operation. Moreover, moving the measurement part 3 at high speed near a subject is reduced, and giving fear to a subject is reduced.

  Hereinafter, an example of the alignment operation of the measurement unit 3 in the present embodiment will be described in detail with reference to FIG. When performing the alignment operation of the measurement unit 3, the control unit 80 controls, for example, Step 1 to Step 13.

  In step 1, the control unit 80 determines whether there is a movement instruction from the measurement unit 3. For example, the presence / absence of an operation signal output by the operation unit 100 is determined. In step 1, the control unit 80 proceeds to step 2 when there is no movement instruction of the measurement unit 3, and proceeds to step 3 when there is a movement instruction.

  In step 2, the control unit 80 determines whether or not the measurement unit 3 is moving. The control unit 80 ends the alignment operation when the measuring unit 3 is not moving, and proceeds to Step 3 when it is moving.

  In Step 3, the control unit 80 determines in which control area the measurement unit 3 is arranged. For example, in the present embodiment, the moving range of the measuring unit 3 is divided into a plurality of control areas. For example, as shown in FIG. 8, the movement range of the measurement unit 3 is set in the control area based on the distance in the Z-axis direction and stored in the storage unit. For example, the region of the distance −L0 to L1 (for example, −15 to 10 mm) is set to the first area A1 and the distances L1 to L2 (for example, 10 to 12) toward the examiner with reference to the position Z0 detected by the sensor. .5 mm) to the second area A2, distances L2 to L3 (for example, 12.5 to 15 mm) to the third area A3, distances L3 to L4 (for example, 15 to 20 mm) to the fourth area A4, and distance L4. Up to L5 (for example, 20 to 25 mm) is set as the fifth area A5. In the first area A1, an entry prohibition area A0 is provided. The entry prohibition area A0 is an area having a distance L0 (for example, 15 mm) in the Z direction and a ± distance X1 (for example, ± 20 mm) in the X direction with respect to the position Z0. The area of the entry prohibition area A0 may be set freely. If the control part 80 determines in which control area the measurement part 3 is arrange | positioned, it will progress to step 4. FIG.

  In step 4, the control unit 80 determines whether or not the measurement unit 3 is located in the entry prohibition area A0. The control unit 80 proceeds to step 5 when the measurement unit 3 is located in the entry prohibited area A0, and proceeds to step 7 when it is not located in the entry prohibited area A0.

  In step 5, the control unit 80 determines whether or not the measurement unit 3 is moving. The control unit 80 ends the alignment operation when the measuring unit 3 is not moving, and proceeds to Step 6 when the measuring unit 3 is moving.

  In step 6, the control unit 80 stops the measurement unit 3. That is, when the measurement unit 3 is moving in the entry prohibition area A0, the control unit 80 stops the measurement unit 3. This prevents the measuring unit 3 from contacting the subject.

  In step 7, the control unit 80 determines whether or not the measurement unit 3 has reached the movement request position. For example, the control unit 80 determines whether or not the measurement unit 3 is arranged at a coordinate position instructed by a command unit (not shown). When the measurement unit 3 is operated by the coarse movement ring mechanism 120, the control unit 80 determines whether there is a movement instruction from the coarse movement ring mechanism 120. When there is a movement instruction, it is determined that the measurement unit 3 has not reached the movement request position, and when there is no movement instruction, it is determined that the measurement unit 3 has reached the movement request position. The control unit 80 proceeds to step 8 when the measurement unit 3 has reached the movement request position, and proceeds to step 9 when it has not reached.

  In step 8, the control unit 80 stops the measurement unit 3 and ends the alignment operation.

  In step 9, the control unit 80 determines the speed limit based on the position of the measurement unit 3. For example, when the measurement unit 3 is arranged in the first area A1, the control unit 80 determines the speed limit for forward / backward movement to 3 mm / sec. For example, when the measurement unit 3 is arranged in the second area A2, the control unit 80 determines the speed limit for forward / backward movement to 5 mm / sec. For example, when the measurement unit 3 is arranged in the third area A3, the control unit 80 determines the speed limit for forward and backward movement as 9 mm / sec. For example, when the measurement unit 3 is arranged in the fourth area A4, the control unit 80 determines the speed limit for forward / backward movement to 15 mm / sec. In the fifth area A5, the speed limit is not set. When the control unit 80 determines the speed limit of the measurement unit 3, the control unit 80 proceeds to Step 10.

  In step 10, the control unit 80 determines whether the movement instruction speed is larger or smaller than the speed limit. For example, when an operation on the coarse movement ring mechanism 120 is detected, a movement instruction speed at 20 mm / sec is output. Accordingly, in the first to fourth areas, the movement instruction speed is larger than the speed limit. The control unit 80 proceeds to step 11 when the movement instruction speed is larger than the speed limit, and proceeds to step 12 when it is smaller.

  In step 11, the control unit 80 sets the speed limit V to the moving speed. When the speed limit is set to the movement speed V, the control unit 80 proceeds to step 13.

  In step 12, the control unit 80 sets the movement instruction speed to the movement speed V. When the movement instruction speed is set to the movement speed V, the control unit 80 proceeds to step 13.

  In step 13, the control unit 80 moves the measurement unit 3 at the moving speed V set in step 11 or step 12. When the movement of the measurement unit 3 is completed, the control unit 80 ends the alignment operation.

  As described above, in the present embodiment, the control unit 80 controls the driving of the measurement unit 3 so that the upper limit of the moving speed becomes small when the measurement unit 3 moves in a region close to the subject. Thus, for example, when the measuring unit 3 is coarsely moved toward the alignment completion position, the examiner can reliably move the measuring unit 3 at a slow speed. Therefore, the examiner is less likely to make operational mistakes. Moreover, the measurement part 3 can be moved in the area | region near a subject, without giving a fear to a subject.

  In this embodiment, the moving area before and after the measuring unit 3 is divided into a plurality of areas. And the moving speed of the measurement part 3 is restrict | limited for every some divided | segmented area | region. For example, as the measuring unit 3 is moved from the examiner side toward the subject side, the moving speed of the measuring unit 3 is limited stepwise so that the moving speed gradually decreases. Thereby, the examiner can move the measuring unit 3 safely and speedily. If the measurement unit 3 is always moved at a low speed, it takes time to move the measurement unit 3. Therefore, as in the present embodiment, by controlling the moving speed of the measuring unit 3 in stages, the measuring unit 3 is moved at a high speed in a region away from the subject and at a low speed in a region close to the subject. be able to. That is, the measurement unit 3 can be moved not only safely but also without stress.

  In addition to controlling the moving speed stepwise as described above, for example, the moving speed may be continuously limited. For example, the delay may be continuously delayed from the position in the Z direction where the measurement unit exists to the reference position Z0.

  In this embodiment, in the restricted region of the moving speed of the measuring unit 3, the measuring unit 3 is moved in either the direction approaching the subject or in the direction away from the subject. Even if it exists, the moving speed is similarly limited. Thus, the operator's operation mistake is reduced by matching the moving speed between when the measuring unit 3 is advanced in the Z-axis direction and when the measuring unit 3 is moved backward. For example, consider a case where the examiner moves the measuring unit 3 forward and backward to make alignment. If the forward speed and the backward speed are different, the examiner cannot refer to the forward speed of the measuring unit 3 when the measuring unit 3 is moved backward, for example. For example, when the measuring unit 3 is moved back and forth for alignment adjustment, it is difficult to operate if the moving speed differs between forward and backward. In the present embodiment, since the forward speed and the backward speed are controlled to coincide with each other, the movement of the measuring unit 3 at a speed not intended by the examiner is reduced.

  In addition, although the present Example demonstrated the case where the measurement part 3 was moved based on the operation signal output from the alignment operation part 101, it is not restricted to this. The alignment operation unit 101 may not be used to move the measurement unit 3. For example, the control unit 80 may move the measurement unit 3 based on a control signal input from a command unit such as a computer. For example, the control unit 80 may acquire the target coordinates and the moving speed input from the command unit. The control unit 80 may control the movement of the measurement unit 3 based on the target coordinates and the moving speed acquired from the command unit. Even in such a case, the control unit 80 may control the moving speed of the measurement unit 3 by the steps shown in FIG.

  The control unit 80 may automatically control the alignment operation. For example, the control unit 80 may automatically perform the alignment operation by detecting the working dots W formed on the fundus. For example, as shown in FIG. 9, the working dots W may be detected from the fundus image captured by the image sensor 35. For example, the control unit 80 may perform alignment so that the signal intensity of the working dot W detected by the image sensor 35 is maximized. Further, the alignment may be performed so that the detection range of the working dots W detected by the light receiving element 35 becomes small.

<Measurement operation>
When the alignment operation is completed, the control unit 80 performs a measurement operation. Depending on the optical system, the alignment completion position and the measurement position may be misaligned. For this reason, the control unit 80 may move the measurement unit 3 from the alignment completion position to the measurement position before the measurement operation. For example, as shown in FIG. 10, the control unit 80 may start measurement after moving the measurement unit 3 from the alignment completion position Zj to the measurement position Zm.

  Note that the distance by which the position of the eye to be examined is moved from the alignment completion position may be set based on the eye characteristics of the eye to be examined. For example, the control unit 80 may obtain the distance by which the measuring unit 3 is moved from the alignment completion position using the corneal curvature of the eye to be examined, the diopter of the eye to be examined, and the like. The corneal curvature of the eye to be examined may be obtained based on the position of the working dot W. The diopter of the eye to be examined may be obtained based on the detection result of the separation state of the focus targets S1 and S2.

  In addition, in the ophthalmic apparatus of a present Example, a visual field can be measured. For example, the control unit 80 controls the optotype presenting unit 71. The control unit 80 randomly switches the target position of the visual field inspection target and changes the luminance of the visual field inspection target. At this time, the subject operates the response unit 5 when recognizing the visual field inspection target while maintaining fixation with the fixation target.

  Based on the input signal from the response unit 5, the control unit 80 stores the response information of the subject in the storage unit. For example, the control unit 80 stores the luminance of the visual field inspection target in response information of sensitivity that can be recognized by the subject at the measurement point and the storage unit. On the other hand, when there is no input from the response unit 5 for the visual field inspection target, the control unit 80 stores the luminance of the visual field inspection target at that time as response information of sensitivity that cannot be recognized by the subject at the measurement point. Store in the department.

  When the examination is completed, the examiner receives the response unit 5 from the subject and stores the response unit 5 in the storage unit 9. The response unit 5 may be taken out from the storage unit 9 by the examiner or taken out and stored by the examinee. As in this embodiment, when the opening of the storage unit 9 faces the subject, the subject can easily put in and out the response unit 5.

DESCRIPTION OF SYMBOLS 1 Ophthalmic apparatus 2 Base 2a Connection part 2b Magnet member 3 Measurement part 4 Display part 5 Response part 6 Drive part 7 Position sensor 8 Face support part 9 Storage part 100 Operation part 101 Alignment operation part 110 Joystick mechanism 120 Coarse movement ring mechanism 300 Measurement optics

Claims (4)

The base,
An optometry unit that is movably mounted on the base and inspects the eye to be examined;
Drive means for moving the optometry unit relative to the eye to be examined;
A joystick mechanism comprising: a joystick supported to be tiltable in an arbitrary direction; and first detection means for detecting a tilting operation on the joystick;
A second operation mechanism comprising: a second operation unit arranged to be slidable with respect to the base; and a second detection means for detecting a slide operation on the second operation unit;
The driving unit is controlled based on an operation signal output from the first detection unit, the optometry unit is moved, and the driving unit is controlled based on an operation signal output from the second detection unit. Drive control means for moving the optometry unit;
A bearing base that separately supports the joystick and the second operation unit;
Ophthalmic device according to claim Bei example Rukoto a. The drive control means includes
Fine movement control means for finely moving the optometry unit by driving the drive means according to the tilt angle of the joystick;
Coarse movement control means for coarsely moving the optometry unit by driving the driving means in accordance with the slide movement of the second operation unit ;
The ophthalmic apparatus according to claim 1, comprising: The ophthalmologic apparatus according to claim 1, wherein the second operation unit is disposed in an opening formed in the base for inserting the joystick .   The ophthalmologic apparatus according to claim 1, wherein the second operation unit is ring-shaped or U-shaped.