JP2018042760A - Ophthalmologic examination apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ophthalmologic examination apparatus capable of easily checking a relationship between a rotation state of an eye to be examined and a fusion state of a chief complaint.SOLUTION: An ophthalmologic examination apparatus includes a visual target presentation part, an imaging part, a direction specification part, and a display control part. The visual target presentation part presents a visual target to an eye to be examined. The imaging part images an anterior eye part of the eye to be examined. The direction specification part specifies the direction of the eye to be examined. The display control part causes display means to display difference information indicating a difference between a reference direction corresponding to a presentation distance of the visual target presented by the visual target presentation part and the direction of the eye to be examined specified by the direction specification part, together with the image of the anterior eye part of the eye to be examined acquired by the imaging part.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an ophthalmic examination apparatus.

  Subjective examination in which the visual acuity value of the eye to be inspected is presented based on how the visual target is displayed, such as a Landolt ring for visual acuity measurement or a radiation chart for astigmatism measurement, in an ophthalmology field or an eyeglass store. Is widely implemented. In the self-examination, the examiner asks the subject about how to see the target, and selects the target to be presented next and determines the visual acuity value based on the response content. There is also an ophthalmic examination apparatus that automatically executes a subjective examination by controlling a visual target and an optical system according to a predetermined control program.

  For example, Patent Document 1 includes a left-eye optical system and a right-eye optical system that project the same fusion pattern as a visual target for examining visual functions onto the left eye and the right eye, respectively. An ophthalmic examination apparatus is disclosed that fuses both eyes.

International Publication No. 2003/041572

  However, in the ophthalmologic examination apparatus disclosed in Patent Document 1, the examiner cannot confirm the orientation of the eye to be examined (gaze, visual axis) during the subjective examination, so the rotation state of the eye to be examined and the fusion state of the chief complaint The relationship between and cannot be specified. Thereby, for example, it is difficult to specify the cause of the subject's inability to fuse.

  The present invention has been made in view of such circumstances, and an object thereof is to provide an ophthalmic examination apparatus capable of easily confirming the relationship between the rotation state of the eye to be examined and the fusion state of the chief complaint. That is.

  The ophthalmic examination apparatus according to the embodiment includes an optotype presenting unit, an imaging unit, a direction specifying unit, and a display control unit. The optotype presenting unit presents the optotype to the eye to be examined. The imaging unit images the anterior segment of the eye to be examined. The direction specifying unit specifies the direction of the eye to be examined. The display control unit has acquired, by the imaging unit, difference information representing a difference in the orientation of the eye to be examined, which is specified by the direction specifying unit with respect to the reference direction corresponding to the presentation distance of the target presented by the target presenting unit. It is displayed on the display means together with the anterior segment image of the eye to be examined.

  According to the ophthalmologic examination apparatus according to the present invention, it is possible to easily confirm the relationship between the rotation state of the eye to be examined and the fusion state of the chief complaint. For example, it is possible to observe the eye position when measuring the vergence divergence force while confirming the adjustment state.

Schematic which shows the external appearance structure of the ophthalmic examination apparatus which concerns on embodiment. Schematic which shows the structural example of the ophthalmic examination apparatus which concerns on embodiment. Schematic which shows the structural example of the optical system of the ophthalmic examination apparatus which concerns on embodiment. Schematic which shows the structural example of the control system of the ophthalmic examination apparatus which concerns on embodiment. Schematic which shows the structural example of the control system of the ophthalmic examination apparatus which concerns on embodiment. Operation | movement explanatory drawing of the ophthalmic examination apparatus which concerns on embodiment. Operation | movement explanatory drawing of the ophthalmic examination apparatus which concerns on embodiment. Operation | movement explanatory drawing of the ophthalmic examination apparatus which concerns on embodiment. Operation | movement explanatory drawing of the ophthalmic examination apparatus which concerns on embodiment. Operation | movement explanatory drawing of the ophthalmic examination apparatus which concerns on embodiment. Operation | movement explanatory drawing of the ophthalmic examination apparatus which concerns on embodiment. Operation | movement explanatory drawing of the ophthalmic examination apparatus which concerns on embodiment. Operation | movement explanatory drawing of the ophthalmic examination apparatus which concerns on embodiment. The flowchart of the operation example of the ophthalmic examination apparatus which concerns on embodiment. The flowchart of the operation example of the ophthalmic examination apparatus which concerns on embodiment. The flowchart of the operation example of the ophthalmic examination apparatus which concerns on embodiment. The flowchart of the operation example of the ophthalmic examination apparatus which concerns on embodiment.

  An example of an embodiment of an ophthalmic examination apparatus according to the present invention will be described in detail with reference to the drawings. In addition, it is possible to use the description content of the literature referred in this specification, and arbitrary well-known techniques for the following embodiment.

[Constitution]
FIG. 1 schematically shows an outline of an external configuration of the ophthalmic examination apparatus according to the embodiment. The ophthalmic examination apparatus 1 according to the embodiment is an ophthalmic apparatus capable of performing subjective examination and objective measurement. The subjective examination is an examination for presenting a visual target to the subject's eye (the subject's eye) and acquiring information about the subject's eye based on a response from the subject regarding how the subject looks. The objective measurement is a measurement for acquiring information about the eye to be examined mainly using a physical method without referring to a response from the subject.

  The ophthalmic examination apparatus 1 can be communicably connected to an examiner controller (for example, a tablet terminal) or a subject controller (for example, a control lever unit) (not shown) via a wired or wireless communication path. The ophthalmic examination apparatus 1 is controlled based on operations on the examiner controller and the subject controller. In the following description, the left-right direction as viewed from the subject may be referred to as the X direction, the up-down direction as the Y direction, and the depth direction of the measuring head 100 as viewed from the subject may be described as the Z direction.

  The ophthalmic examination apparatus 1 includes a measurement head 100 and a control device 200. The measuring head 100 is provided with an optical system and a moving mechanism system for moving the optical element for performing the above-described subjective examination and objective measurement. The control device 200 controls the measurement head 100 and controls the examiner controller and the subject controller.

  The ophthalmic examination apparatus 1 includes an optometry table 3. The optometry table 3 is a desk for supporting the measuring head 100 and placing the controller for the examiner or the controller for the subject. The optometry table 3 is installed in a state of being supported on the floor by the support unit 4. The optometry table 3 is adjustable in height up and down.

  A support column 5 is erected on the optometry table 3. The proximal end portion of the lateral arm 6 is held at the distal end portion of the support column 5. A measuring head 100 is suspended from the tip of the horizontal arm 6. For example, the support column 5 can be rotated in the rotation direction (arrow direction j, arrow direction k) about the axis by the arm moving mechanism 7. Thereby, the horizontal arm 6 is rotated around the axis. That is, the measuring head 100 is rotated around the axis. As a result, the measuring head 100 can be retracted from the examination space above the optometry table 3, and the examination can be efficiently performed using the empty space on the optometry table 3.

  The arm moving mechanism 7 may move the tip of the support column 5 in the vertical direction (arrow direction h) as an arm vertical movement mechanism. Thereby, the horizontal arm 6 is moved in the vertical direction. That is, the measuring head 100 is moved in the vertical direction. The arm moving mechanism 7 may move the horizontal arm 6 in the vertical direction by expanding and contracting the support column 5 protruding upward from the optometry table 3 as an arm expansion and contraction mechanism. Even in this case, the measurement head 100 can be moved up and down according to the sitting height of the subject, or the measurement head 100 can be retracted from the examination space above the optometry table 3.

  A stand or the like for storing the measurement head 100 may be separately provided, and the measurement head 100 may be disposed at a stable position by the above-described rotation or vertical movement. In this case, it is possible to continuously reduce the load on the lateral arm 6 due to the weight of the measuring head 100.

  The arm moving mechanism 7 can receive the operation by the operator and manually move the horizontal arm 6 in the rotation direction around the axis or in the vertical direction. The arm moving mechanism 7 may move the horizontal arm 6 by an electric mechanism. In this case, an actuator that generates a driving force for moving the arm moving mechanism 7 and a transmission mechanism that transmits the driving force are provided. The actuator is constituted by, for example, a pulse motor. The transmission mechanism is configured by, for example, a combination of gears, a rack and pinion, or the like.

  A storage unit 9 is provided on a side surface of the support unit 4 to store the control device 200 and the like. The configuration of the optometry table 3 is not limited to the configuration shown in FIG.

[Measurement head]
The measurement head 100 includes a left eye inspection unit 120L and a right eye inspection unit 120R. Examination windows 130L and 130R are formed in the left-eye examination unit 120L and the right-eye examination unit 120R, respectively. The left eye (left eye) of the subject is examined through the optometry window 130L. The subject's right eye (right eye) is examined through the optometry window 130R.

  FIG. 2 shows a block diagram of a configuration example of the measurement head 100 according to the embodiment. The measurement head 100 includes a moving mechanism system 110, a left eye inspection unit 120L, and a right eye inspection unit 120R. The moving mechanism system 110 is suspended from the horizontal arm 6. The left-eye inspection unit 120L and the right-eye inspection unit 120R are three-dimensionally moved independently or in conjunction by the moving mechanism system 110. The left eye inspection unit 120L accommodates an optical system for inspection of the left eye. The right eye inspection unit 120R houses an optical system for inspecting the right eye.

(Movement system)
The moving mechanism system 110 includes a horizontal movement mechanism 111, rotation mechanisms 112L and 112R, and vertical movement mechanisms 113L and 113R. The moving mechanism system 110 may further include an arm moving mechanism 7.

  The horizontal movement mechanism 111 moves the rotation mechanisms 112L and 112R, the vertical movement mechanisms 113L and 113R, the left-eye inspection unit 120L, and the right-eye inspection unit 120R in the horizontal direction (lateral direction (X direction), front-rear direction (Z direction)). ). Thereby, the horizontal position of the optometry windows 130L and 130R can be adjusted according to the arrangement position of the eye to be examined. The horizontal movement mechanism 111 has a known configuration using, for example, a pulse motor or a feed screw, and moves the rotation mechanisms 112L and 112R in the horizontal direction in response to a control signal from the control device 200. The horizontal movement mechanism 111 can be manually moved in the horizontal direction by the above-described rotation mechanisms 112L, 112R, etc. in response to an operation by the operator.

  The rotation mechanism 112L rotates the vertical movement mechanism 113L and the left-eye inspection unit 120L around a predetermined first axis connected to the horizontal movement mechanism 111. The first axis is an axis extending in a substantially vertical direction, and may be tiltable at an arbitrary angle with respect to the horizontal plane. The rotation mechanism 112L has a known configuration using, for example, a pulse motor or a rotation shaft, and rotates the left eye inspection unit 120L around the first axis in response to a control signal from the control device 200. Let The rotation mechanism 112L can manually rotate the left-eye inspection unit 120L and the like about the first axis in response to an operation by the operator.

  The rotation mechanism 112R rotates the vertical movement mechanism 113R and the right-eye inspection unit 120R about a predetermined second axis connected to the horizontal movement mechanism 111. The second axis is an axis extending in a substantially vertical direction like the first axis, and may be tiltable at an arbitrary angle with respect to the horizontal plane. The second axis is an axis that is disposed at a position separated from the first axis by a predetermined distance. The distance between the first axis and the second axis is adjustable. The rotation mechanism 112R may rotate the right eye inspection unit 120R or the like in conjunction with the rotation of the rotation mechanism 112L, or the right eye inspection unit 120R independently of the rotation of the rotation mechanism 112L. Etc. may be rotated. The rotation mechanism 112R has a known configuration similar to that of the rotation mechanism 112L, and receives the control signal from the control device 200 to rotate the right-eye inspection unit 120R and the like about the second axis. The rotation mechanism 112R can receive the operation by the operator and manually rotate the right-eye inspection unit 120R and the like about the second axis.

  By rotating the left eye inspection unit 120L and the right eye inspection unit 120R by the rotation mechanisms 112L and 112R, the directions of the left eye inspection unit 120L and the right eye inspection unit 120R are relatively changed. Is possible. For example, the left-eye inspection unit 120L and the right-eye inspection unit 120R are rotated in opposite directions around the eyeball rotation points of the left and right eyes of the subject. Thereby, the eye to be examined can be spread and converged.

  The vertical movement mechanism 113L moves the left-eye inspection unit 120L in the vertical direction (Y direction). Thereby, the position in the height direction of the optometry window 130L can be adjusted according to the arrangement position of the eye to be examined. The vertical movement mechanism 113L has a known configuration using, for example, a pulse motor or a feed screw, and moves the left eye inspection unit 120L in the vertical direction in response to a control signal from the control device 200. The vertical movement mechanism 113L can receive the operation by the operator and manually move the left-eye inspection unit 120L in the vertical direction.

  The vertical movement mechanism 113R moves the right eye inspection unit 120R in the vertical direction. Thereby, the position in the height direction of the optometry window 130R can be adjusted according to the arrangement position of the eye to be examined. The vertical movement mechanism 113R may move the right eye inspection unit 120R in conjunction with the movement by the vertical movement mechanism 113L, or by moving the right eye inspection unit 120R independently of the movement by the vertical movement mechanism 113L. Also good. The vertical movement mechanism 113R has a known configuration similar to the vertical movement mechanism 113L, and moves the right eye inspection unit 120R in the vertical direction in response to a control signal from the control device 200. The vertical movement mechanism 113R can receive the operation by the operator and manually move the right eye inspection unit 120R in the vertical direction.

(Configuration of each inspection unit)
The left-eye inspection unit 120L and the right-eye inspection unit 120R can operate individually.

  The left-eye examination unit 120L includes a first target presentation unit 122L, a first objective measurement unit 123L, and a first imaging unit 124L. The first visual target presenting unit 122L selectively presents a plurality of visual targets to the left eye. The first objective measurement unit 123L is used to perform objective refraction measurement (objective measurement) of the left eye. The first imaging unit 124L images the anterior segment of the left eye. The left eye inspection unit 120L may be provided with an optical element application unit that selectively applies a plurality of optical elements that can be disposed between the left eye to be examined and a deflection member P described later to the left eye to be examined. .

  The right-eye examination unit 120R includes a second target presentation unit 122R, a second objective measurement unit 123R, and a second imaging unit 124R. The second target presentation unit 122R selectively presents a plurality of targets to the right eye. The second objective measurement unit 123R is used to perform objective refractive measurement of the right eye. The second imaging unit 124R images the anterior segment of the right eye. The right eye inspection unit 120R may be provided with an optical element application unit that selectively applies a plurality of optical elements that can be arranged between the right eye to be examined and a deflection member P described later to the right eye to be examined. .

  The left eye inspection unit 120L and the right eye inspection unit 120R accommodate an optical system as shown in FIG. The left-eye examination unit 120L and the right-eye examination unit 120R operate the optical system to perform subjective examination and objective refraction measurement for each of the left eye EL and right eye ER. It is configured as follows. The examiner or the subject performs an examination by appropriately operating a controller or the like.

  When each inspection unit is provided with the optical element application unit, the optical element application unit includes a plurality of optical elements and a drive mechanism. The plurality of optical elements is a set of various lenses for inspecting the visual function of the eye to be examined, and includes at least one of a spherical lens, a cylindrical lens, and a prism lens, for example. The plurality of optical elements are grouped for each type of optometry parameter. For example, the type of optometry parameter includes at least one of spherical power, astigmatism power, astigmatism axis angle, addition power, interpupillary distance, prism power, and prism base direction. As a grouping for each type of optometry parameter, the spherical power group includes a plurality of spherical lenses, each of which is composed of spherical lenses having different spherical powers. The set of astigmatism powers includes a plurality of cylindrical lenses, each of which is composed of cylindrical lenses having different astigmatic powers. The set of astigmatism powers may be switched in accordance with the astigmatic axis angle. The set of addition powers is composed of a positive power spherical lens and a negative power spherical lens that can be inserted and removed. The set of prism powers includes a plurality of prism lenses, each of which is composed of prism lenses having different prism powers. It should be noted that the set of prism powers may be switched in accordance with the prism base direction. The interpupillary distance is an examination condition set in accordance with the interpupillary distance of the eye to be examined. The interpupillary distance is set by one or both of the left-eye inspection unit 120L and the right-eye inspection unit 120R sliding in the horizontal direction (arrow direction m in FIG. 1).

  The drive mechanism included in each examination unit is configured such that each of the plurality of optical elements can be disposed on the optometry window and retracted from the optometry window. The drive mechanism included in each inspection unit receives the control signal from the control device 200 and switches the optical element. Accordingly, at least one of spherical power, astigmatism power, astigmatism axis angle, addition power, interpupillary distance, prism power, and prism base direction can be switched and applied to the eye to be examined.

[Configuration of optical system]
FIG. 3 shows a block diagram of a configuration example of an optical system accommodated in the left-eye inspection unit 120L and the right-eye inspection unit 120R. The left-eye inspection unit 120L includes a deflection member P, a target presentation optical system 10L, a photographing optical system 20L, alignment optical systems 30L and 31L, a reflex measurement optical system 40L, and a kerato measurement optical system 50L. . The left-eye inspection unit 120L is provided with an objective lens 60, a moving lens 70, a reflection mirror M, and beam splitters BS1 to BS3. The right-eye inspection unit 120R includes a deflection member P, a target presentation optical system 10R, a photographing optical system 20R, alignment optical systems 30R and 31R, a reflex measurement optical system 40R, and a kerato measurement optical system 50R. . The right-eye inspection unit 120R is provided with an objective lens 60, a moving lens 70, a reflection mirror M, and beam splitters BS1 to BS3. The optical system of the left-eye inspection unit 120L and the optical system of the right-eye inspection unit 120R are configured symmetrically. Hereinafter, unless otherwise indicated, the optical system of the left-eye inspection unit 120L will be described.

  The optotype presenting optical system 10L is an optical system for projecting the optotype on the fundus oculi Ef of the left eye to be examined EL. The target presentation optical system 10L includes an LCD (Liquid Crystal Display) 11, a moving lens 70, and a reflection mirror M. The LCD 11 displays various visual targets (charts) for visual acuity measurement and visual function inspection. These targets include a plurality of targets and a single target. Visual targets for visual acuity measurement include a fixation target composed of a landscape chart, a visual acuity chart such as a Landolt ring for visual acuity inspection, and an ETDRS (Early Treatment Diabetic Study) visual acuity chart. The target for visual function inspection includes cross cylinder test chart, radiation chart for astigmatism inspection, cross chart for oblique inspection, red green test chart, screening target, cross ring chart, convoluted oblique chart, Worth 4 There are point charts. The multiple targets include an ETDRS vision chart, an illustration target, a screening target, and the like. Single targets include precision stereoscopic targets, cruciform targets, astigmatic targets, and red-green test charts. These targets are selectively displayed on the LCD 11. Instead of the LCD 11, the target presentation optical system 10 </ b> L emits one or more targets among a plurality of targets drawn on an electronic display device using EL (electroluminescence) or a rotating glass plate. What is appropriately arranged on the shaft (turret type) may be provided.

  The moving lens 70 is movable in the optical axis direction of the target presentation optical system 10L. The moving lens 70 is moved by the drive mechanism 70L. The driving mechanism 70L moves the moving lens 70 in response to a control signal from the control device 200. Thereby, the sphericity added to the left eye to be examined EL can be changed. For example, by moving the moving lens 70 in the optical axis direction by the amount of movement corresponding to the refractive power of the left eye EL during reflex measurement, it is possible to perform fixation clouding on the left eye EL. In addition, at the subjective examination, the target can be presented at a position corresponding to the far point of the eye to be examined, a position corresponding to the near point, or any intermediate position between them, and the examination can be performed at an arbitrary examination distance. it can.

  The light from the LCD 11 passes through the moving lens 70 and is reflected by the reflection mirror M. The light reflected by the reflection mirror M passes through the beam splitter BS2 and is reflected by the beam splitter BS1. The light reflected by the beam splitter BS1 passes through the objective lens 60 and is deflected by the deflecting member P toward the fundus oculi Ef of the left eye EL.

  The visual target presenting optical system 10L may be provided with a VCC lens for correcting the astigmatism power and the astigmatic axis angle of the left eye to be examined EL.

  The imaging optical system 20L is an optical system for imaging the anterior segment of the left eye EL. The photographing optical system 20L includes a CCD (Charged-Coupled Device) 21. For example, when the anterior segment of the left eye EL is illuminated by an anterior segment illumination system (not shown), the reflected light from the anterior segment of the left eye EL is incident on the deflection member P. The deflecting member P deflects the reflected light toward the objective lens 60. The reflected light deflected by the deflecting member P passes through the objective lens 60, passes through the beam splitters BS1 and BS3, and forms an image on the light receiving surface of the CCD 21 by a CCD lens or the like (not shown). Further, the photographing optical system 20L functions as a light receiving system that receives reflected light of the measurement light beam projected on the left eye EL in the reflex measurement and the kerato measurement.

  The alignment optical system 30L is an optical system for performing alignment in the X and Y directions of the optical system of the left eye inspection unit 120L with respect to the left eye E. The alignment optical system 30L projects an alignment light beam (parallel light) onto the left eye EL. The alignment light beam is reflected by the beam splitter BS3, passes through the beam splitter BS1, passes through the objective lens 60, becomes a substantially parallel light beam, and is deflected by the deflection member P toward the cornea of the left eye EL. The reflected light from the cornea of the alignment light beam projected on the left eye EL returns through the same path as the incident path, passes through the beam splitter BS3, and is received by the CCD 21 of the imaging optical system 20L.

  The alignment optical system 31L includes two or more cameras for photographing the anterior eye portion of the left eye EL substantially simultaneously from two or more different directions. Alignment in the Z direction (working distance direction) is performed from the parallax obtained based on the captured images of the anterior segment from two or more different directions obtained using these cameras.

  The reflex measurement optical system 40L is an optical system for performing reflex measurement (objective refraction measurement) of the left eye to be examined EL. The reflex measurement light beam emitted from the reflex measurement optical system 40L is reflected by the beam splitter BS2, reflected by the beam splitter BS1, passes through the objective lens 60, and is directed toward the fundus oculi Ef of the left eye EL by the deflection member P. Is deflected. The reflected light from the fundus of the reflex measurement light beam projected onto the left eye EL returns through the same path as the incident path, passes through the beam splitters BS1 and BS3, and is received by the CCD 21 of the imaging optical system 20L.

  The kerato measurement optical system 50L is an optical system for performing kerato measurement of the left eye to be examined EL. The ring-shaped light beam from the kerato ring light source emitted by the kerato measurement optical system 50L is deflected by the deflecting member P and illuminates the cornea of the left eye EL. Reflected light from the cornea of the left eye EL is deflected by the deflecting member P, passes through the objective lens 60, passes through the beam splitters BS1 and BS3, and forms a ring-shaped image on the light receiving surface of the CCD 21 by a CCD lens (not shown). Imaged.

  The measurement head 100 automatically executes alignment of the optical systems of each of the left eye inspection unit 120L and the right eye inspection unit 120R, objective optometry, subjective optometry, and the like under the control of a control system described later. It is like that. The measurement head 100 may further automatically execute a binocular balance test. In the subjective examination, a value (objective value) obtained by objective measurement is used. In particular, in the cross-cylinder test in the subjective examination, the astigmatism power and the astigmatic axis angle obtained in the objective examination are used.

[Control system]
Next, a control system of the ophthalmic examination apparatus 1 according to the embodiment will be described with reference to FIGS. 4 and 5. The block diagrams shown in FIGS. 4 and 5 represent the schematic configuration of the main part of the control system of the ophthalmic examination apparatus 1. 4 and 5, the same parts as those in FIGS. 1 to 3 are denoted by the same reference numerals, and the description thereof is omitted as appropriate.

  As shown in FIG. 4, the control system of the ophthalmic examination apparatus 1 is configured around a control device 200 that controls each part of the apparatus. The control device 200 is stored in the storage unit 9, for example. The control device 200 includes a control unit 201 and a storage unit 202. The control unit 201 includes a display control unit 201A and a target control unit 201B.

  The storage unit 202 stores a computer program for ophthalmic examination including a control program for executing processing as described later, image data of a target pattern displayed on the LCD 11, and the like. Further, in the storage unit 202, an image of the anterior segment of the left eye E acquired using the imaging optical systems 20L and 20R, an image of the anterior segment of the right eye ER, a reflex measurement result, a kerato measurement result, Awareness test results are stored. The control unit 201 reads the computer program stored in the storage unit 202 and sequentially executes the computer program while referring to the image data stored in the storage unit 202. Such a control unit 201 includes an arithmetic control processor such as a CPU (Central Processing Unit).

  A computer device (not shown) may be connected to the ophthalmic examination apparatus 1. In this case, the computer device is used as a console of the ophthalmic examination apparatus 1 and is used for accumulating and managing examination results by the ophthalmic examination apparatus 1. Note that the CPU and the storage device of the computer device can be configured as the control device 200.

  The control device 200 (control unit 201) controls the operation of the left-eye inspection unit 120L and the right-eye inspection unit 120R. Specifically, the control device 200 controls the horizontal movement mechanism 111 that horizontally moves the left-eye inspection unit 120L and the right-eye inspection unit 120R. The control device 200 controls a rotation mechanism 112L that rotates the left-eye inspection unit 120L and a vertical movement mechanism 113L that moves the left-eye inspection unit 120L up and down. Similarly, the control device 200 controls a rotation mechanism 112R that rotates the right eye inspection unit 120R and a vertical movement mechanism 113R that moves the right eye inspection unit 120R up and down. The control device 200 may control the arm moving mechanism 7 that moves the horizontal arm 6 up and down and rotates it.

  The control device 200 (control unit 201) controls the operation of the optical system stored in the left-eye inspection unit 120L and the right-eye inspection unit 120R. The control device 200 (target control unit 201B) executes display control of the LCD 11, for example. Display control of the LCD 11 includes target switching control, target lighting control, target extinguishing control, and the like. In addition, the control device 200 (the control unit 201) executes operation control of the drive mechanisms 70L and 70R that move the moving lens 70 in the optical axis direction.

  The control device 200 (control unit 201) executes light reception control by the CCD 21, operation control of the alignment optical systems 30L, 31L, 30R, 31R, the reflex measurement optical systems 40L, 40R, the kerato measurement optical systems 50L, 50R, and the like. The left eye inspection unit 120L for the left eye EL so that the deviation between the position of the spot light image projected on the left eye EL by the alignment optical system 30L and the position of the pupil center of the left eye EL is cancelled. It is possible to perform alignment in the X and Y directions of the optical system. Similarly, the alignment optical system 30R can perform alignment in the XY directions of the optical system of the right-eye inspection unit 120R with respect to the right eye ER. It is possible to perform alignment in the Z direction from the parallax obtained based on the captured images of the anterior segment of the left eye EL from two or more different directions acquired using the alignment optical system 31L. Similarly, the alignment optical system 31R can perform alignment in the Z direction from parallax obtained based on the captured image of the anterior segment of the right eye ER from two or more different directions. The operation control of the reflex measurement optical systems 40L and 40R includes control of a measurement light source that emits a reflex measurement light beam. The operation control of the kerato measurement optical systems 50L and 50R includes control of a kerat light source.

  When each inspection unit is provided with an optical element application unit, the control device 200 (control unit 201) is a drive mechanism for selectively applying a plurality of optical elements to at least one of the left eye to be examined EL and the right eye to be examined ER. Execute control etc.

  The control device 200 can be connected to the examiner controller 300 and the subject controller 310 via wired or wireless communication paths, respectively. The control device 200 receives the operation signal corresponding to the operation content for the examiner controller 300 and the subject controller 310 and controls each part of the ophthalmic examination apparatus 1. The control device 200 (the display control unit 201A) can display an operation screen, various information for measurement, and the like on the display unit of the controller 300 for the examiner or the controller 310 for the subject. For example, the control device 200 causes the display unit of the examiner's controller 300 to display the visual target under examination. In addition, the control device 200 displays an operation screen or the like on the display unit of the subject controller 310.

  The operation principle of alignment using the above-described optical system, the measurement principle of subjective examination, the measurement principle of objective measurement, the measurement principle of corneal shape, and the like are already known, and detailed description thereof is omitted.

  The control device 200 (control unit 201) controls the calculation unit 210. The calculation unit 210 obtains an objective value based on a measurement result by objective refraction measurement using the left-eye inspection unit 120L or the right-eye inspection unit 120R. The calculation unit 210, for example, uses a known method to obtain the shape of the ring target image obtained by receiving the return light of the ring-shaped measurement light beam projected onto the fundus oculi Ef by the reflex measurement optical systems 40L and 40R by the CCD 21. The objective value is obtained by analysis. For example, the calculation unit 210 performs predetermined calculation processing on an image acquired by receiving, by the CCD 21, a reflected light beam from the cornea of a ring-shaped light beam projected onto the cornea of the eye to be examined by the kerato measurement optical systems 50L and 50R. Apply. Thereby, a parameter representing the shape of the cornea can be calculated as an objective value. The control device 200 may include a calculation unit 210.

  Furthermore, as illustrated in FIG. 5, the calculation unit 210 includes an orientation specifying unit 211, a reference orientation specifying unit 212, an interpupillary distance acquiring unit 213, a difference information generating unit 214, a position specifying unit 215, and refractive power. A calculation unit 216 and a characteristic information generation unit 220 are included. The characteristic information generation unit 220 includes an adjustment force characteristic information generation unit 220A and a rotation characteristic information generation unit 220B.

  The direction specifying unit 211 specifies the direction of the eye to be examined (each of the left eye to be examined EL and the right eye to be examined ER). The direction of the eye to be examined is the direction of the eye axis (line of sight) of the eye to be examined, the direction of the optical axis of the eye to be examined, the direction of the eye axis of the eye to be examined (eyeball axis), the direction of the eye of the eye to be examined, the aiming of the eye to be examined The direction of the line, the direction of the pupil center line of the eye to be examined, and the like.

  The orientation identifying unit 211 identifies the orientation of the left eye to be examined EL, and identifies the orientation of the right eye to be examined ER in the same manner as the orientation of the left eye to be examined EL. In the following, for convenience of description, the left eye to be examined EL or the right eye to be examined ER will be described as “eye to be examined” unless otherwise specified.

  The direction specifying unit 211 specifies, for example, the line-of-sight direction around the eyeball rotation point of the eye to be examined as the direction of the eye to be examined. In this case, the direction identifying unit 211 can obtain the line-of-sight direction θ based on the amount of movement of the position of the bright spot image formed by the spot light incident on the eyeball in the anterior segment image of the eye to be examined. The spot light is incident on the eye to be examined by an existing projection system such as the alignment optical systems 30L and 30R, the reflex measurement optical systems 40L and 40R, or a separately provided projection system. When a parallel light beam enters the eyeball, a spot-like virtual image (Purkinje image) is formed at a position Q (half the corneal curvature, R / 2) inside the cornea, as shown in FIG. 6A. Since the curvature center point R of the cornea and the eyeball rotation point O are different, when the eyeball rotates at the rotation angle θ about the eyeball rotation point O, the position Q of the bright spot image in the anterior segment image is as shown in FIG. 6A. Move to. The orientation specifying unit 211 specifies the position Q of the bright spot image with reference to the characteristic part in the anterior eye part image of the eye to be examined, and specifies the displacement of these positions as the movement amount d.

When the distance from the apex of the cornea to the eyeball rotation point O is L ₀ and the curvature of the cornea is r, the movement amount d of the position Q of the bright spot image is expressed as in Expression (1).

From the equation (1), the direction identifying unit 211 can obtain the rotation angle θ. The distance L ₀ from the corneal apex to the eyeball rotation point O may be a predetermined value (for example, an average value of 13 mm). Alternatively, this value may be input when the actual distance is known in measurement by another device. As the curvature r of the cornea, a value obtained by kerato measurement can be used.

  As described above, the orientation specifying unit 211 analyzes the anterior segment image acquired by the imaging optical systems 20L and 20R to determine the position of the image based on the spot light (light beam) incident on the eye to be examined. It is possible to specify the direction of the eye to be examined based on the position.

  In addition, for example, the orientation identifying unit 211 may identify a pupil region in the anterior segment image of the eye to be examined, and obtain the line-of-sight direction θ1 based on the amount of movement of the pupil center position of the identified pupil region. When the eyeball rotates around the eyeball rotation point O, as shown in FIG. 6B, the position Q1 of the pupil center in the anterior segment image of the eye to be examined moves. The orientation specifying unit 211 specifies the pupil region in the anterior segment image of the eye to be examined, specifies the center position of the specified pupil region as the pupil center position Q1, and the displacement of these positions. Is obtained as a movement amount d1.

  When the distance from the corneal apex to the eyeball rotation point O is L and the distance from the corneal apex to the pupil center position Q1 is N, the movement amount d1 of the pupil center position Q1 is expressed as shown in Expression (2). The

From the equation (2), the direction identifying unit 211 can obtain the rotation angle θ1. The distance L ₀ from the corneal apex to the eyeball rotation point O may be a predetermined value (for example, an average value of 13 mm). The distance N from the corneal apex to the pupil center position Q1 may be a predetermined value (for example, an average value of 3 mm). Alternatively, the measurement by another device, may be input to this value when the actual distance L ₀ and Q1 are known.

  In addition, the orientation specifying unit 211 may specify the orientation of the eye to be examined by, for example, a scleral reflection method. The scleral reflection method is a method that uses the difference in reflectance between the cornea (black eyes) and the sclera (white eyes). The orientation identification unit 211 irradiates near-infrared light to the eye to be examined, identifies the corneal region by measuring the intensity of reflected light from the eye to be examined, and cornea region with respect to a predetermined reference position of the eye to be examined ( For example, the orientation of the position of the center of the cornea) is specified as the orientation of the eye to be examined.

  In addition, the orientation specifying unit 211 may specify the orientation of the eye to be examined by, for example, analyzing an anterior eye image of the eye to be examined. The orientation identifying unit 211 identifies a corneal region (black eye region) and a scleral region (white eye region) from the acquired luminance information in the anterior segment image of the eye to be examined, and a corneal region with respect to a predetermined reference position of the eye to be examined ( The direction of the position of the corneal region and the center of the pupil) is specified as the direction of the eye to be examined.

  As described above, the orientation specifying unit 211 analyzes the anterior segment image acquired by the imaging optical systems 20L and 20R and obtains the position of the anterior segment feature point (corneal region, corneal center, pupil center, etc.). The direction of the eye to be examined can be specified based on the obtained position.

  Further, the orientation specifying unit 211 may specify the orientation of the eye to be examined by detecting a potential difference between the cornea side and the retina side of the eyeball. For example, the orientation specifying unit 211 specifies the orientation of the eye to be examined by analyzing the movement of the eyeball from the potential difference obtained by measuring the potential difference of the skin around the eye to be examined.

  The reference orientation specifying unit 212 specifies the reference orientation of the eye to be examined (each of the left eye to be examined EL and the right eye to be examined ER) corresponding to the target presentation distance. The reference orientation represents the orientation of the eye to be examined when the eye position is normal. Similar to the direction of the eye to be examined, the reference direction of the eye to be examined includes the reference direction of the visual axis (line of sight) of the subject eye, the reference direction of the optical axis of the subject eye, the reference orientation of the eye axis of the subject eye (eyeball axis), There are the reference direction of the gaze line of the eye to be examined, the reference direction of the line of sight of the eye to be examined, the reference direction of the pupil center line of the eye to be examined, and the like.

  The reference orientation specifying unit 212 specifies the reference orientation of the left eye to be examined EL, and specifies the reference orientation of the right eye to be examined by the same technique as the orientation of the left eye to be examined EL.

  For example, the reference direction specifying unit 212 specifies the line-of-sight direction centered on the eyeball rotation point of the eye to be examined with a normal eye position as the reference direction of the eye to be examined. Such a reference orientation can be specified from the distance between the pupils of the subject and the presentation distance of the visual target.

  FIG. 7 is an explanatory diagram of the reference orientation of the eye to be examined according to the embodiment. FIG. 7 schematically shows the measuring head 100 when viewed from above. 7, parts that are the same as those in FIG. 3 are given the same reference numerals, and descriptions thereof will be omitted as appropriate.

  The subject gazes at the visual target by converging the left eye to be examined EL and the right eye to be examined ER according to the presentation position of the visual target. The reference orientation identifying unit 212 identifies the reference orientation using trigonometry based on the target presentation distance (examination distance) and the distance between the pupils of the subject. Reference orientation specifying unit when L is the presentation distance from the left eye to be examined EL (or right eye to be examined ER) and the target presentation position is PD, the distance between pupils of the subject is PD, and half the distance between pupils is hPD In 212, the convergence angle θ2 of the left eye to be examined EL (or the right eye to be examined ER) is obtained by Expression (3). The reference orientation specifying unit 212 specifies the obtained convergence angle θ2 as a reference orientation corresponding to the target presentation distance. The reference orientation corresponds to the rotation angle of the measurement head 100 (left eye inspection unit 120L, right eye inspection unit 120R).

  Further, for example, when the presentation distance L is designated by the examiner operating the examiner's controller 300, the control unit 201 is based on the interpupillary distance PD of the subject and the presentation distance L. The rotation angle θ2 of the left eye inspection unit 120L and the right eye inspection unit 120R is obtained. The control unit 201 can rotate each of the left-eye inspection unit 120L and the right-eye inspection unit 120R in the opposite directions around the eyeball rotation point by the rotation angle θ2 obtained by Expression (3). In this case, the convergence angle θ2 specified by the reference direction specifying unit 212 is substantially offset by the rotation of the left-eye inspection unit 120L and the right-eye inspection unit 120R.

  The presentation distance may be specified by the control unit 201 in accordance with a predetermined examination sequence, or may be specified by the subject operating the subject controller 310.

  The interpupillary distance acquisition unit 213 acquires the interpupillary distance PD (or hPD that is half the interpupillary distance). The interpupillary distance acquisition unit 213 acquires the interpupillary distance PD by analyzing, for example, the anterior eye image of the left eye EL and the anterior eye image of the right eye ER acquired by the imaging optical systems 20L and 20R. To do. In this case, the interpupillary distance acquiring unit 213 analyzes the anterior eye image of the left eye EL and the anterior eye image of the right eye ER acquired by the imaging optical systems 20L and 20R to analyze the pupil of the left eye EL The center (center of gravity) position and the pupil center (center of gravity) position of the right eye ER to be examined are specified. The interpupillary distance acquisition unit 213 obtains the distance between the specified pupil center position of the left eye to be examined EL and the pupil center position of the right eye to be examined ER as the interpupillary distance PD.

  Further, the inter-pupil distance PD may be a standard distance. The standard distance may be a distance defined by the model eye. Model eyes include Gullstrand model eyes. In this case, the interpupillary distance acquisition unit 213 acquires the interpupillary distance PD and the like by reading the interpupillary distance PD (or hPD that is half of the interpupillary distance) stored in the storage unit 202 in advance. Further, the interpupillary distance acquisition unit 213 may acquire the interpupillary distance specified based on the operation details on the examiner controller 300 or the subject controller 310.

  The difference information generation unit 214 generates difference information representing a difference in the direction of the eye to be examined specified by the direction specifying unit 211 with respect to the reference direction specified by the reference direction specifying unit 212. The difference information includes information representing only the difference in the orientation of the eye to be examined with respect to the reference orientation, and information representing both the reference orientation and the orientation of the eye to be examined. The difference information may include information representing a component of the difference in the horizontal direction (first direction) and information representing a component of the difference in the vertical direction (second direction orthogonal to the first direction). Further, the difference information may include a value or image representing only the above difference, a value or image representing both of the above.

  The difference information generation unit 214 according to the embodiment generates difference information including a reference image that indicates the reference direction specified by the reference direction specifying unit 212 and a direction image that indicates the direction of the eye to be examined specified by the direction specifying unit 211. Generate. Further, the difference information generation unit 214 generates a first component image representing a component in the horizontal direction of a difference in the direction of the eye to be examined with respect to the reference direction, and a second component image representing a component in the vertical direction. That is, the reference image includes a first reference image that represents a component in the horizontal direction of the reference direction, and a second reference image that represents a component in the vertical direction. The orientation image includes a first orientation image that represents a component in the horizontal direction of the orientation of the eye to be examined, and a second orientation image that represents a component in the vertical direction. As described above, the difference information generation unit 214 may generate difference information including a value indicating the reference direction and a value indicating the direction of the eye to be examined.

  8A and 8B show an example of difference information according to the embodiment. 8A and 8B show an example of difference information displayed on the display unit of the controller 300 for the examiner when the measurement head 100 is rotated according to the convergence of the eye to be examined.

  The display control unit 201A displays the difference information generated by the difference information generation unit 214 together with the anterior eye image of the subject's eye acquired by the imaging optical systems 20L and 20R, as well as the controller 300 for the examiner (or the controller 310 for the subject). ) Can be displayed on the display section. 8A and 8B, the anterior segment image GL of the left subject eye EL and the anterior segment image GR of the right subject eye ER are displayed on the display unit of the controller 300 for the examiner.

  For example, as shown in FIG. 8A, a first display area HL is provided in the vicinity of the upper end of the rectangular display area in which the anterior segment image GL is arranged, and a second display area is provided in the vicinity of the right end. PL is provided. A third display region HR is provided in the vicinity of the upper end portion of the rectangular display region in which the anterior segment image GR is arranged, and a fourth display region PR is provided in the vicinity of the left end portion.

  In the first display area HL, a horizontal component image representing the horizontal component of the difference in the direction of the left eye EL with respect to the reference direction is displayed. It is also possible to display the angle θ representing the line-of-sight direction or the prism value Δ in the vicinity. The horizontal component image includes a reference image R1 representing a component in the horizontal direction of the reference orientation, and a direction image D1 representing a component in the horizontal direction of the direction of the left eye EL. In FIG. 8A, since the measuring head 100 is rotated in accordance with the convergence of the eye to be examined as described above, the horizontal position of the reference image R1 substantially matches the horizontal position of the pupil center position of the left eye to be examined EL. It is displayed to do. In the second display area PL, a vertical component image representing a component in the vertical direction of the difference in the direction of the left eye EL with respect to the reference direction is displayed. The vertical component image includes a reference image R2 representing a component in the vertical direction of the reference direction and a direction image D2 representing a component in the vertical direction of the direction of the left eye EL. In the first display area HL and the second display area PL, an image representing a scale, a value representing a difference, an amount of the difference, and a direction corresponding to the difference may be displayed.

  In the third display area HR, a horizontal component image representing a horizontal component of the difference in the direction of the right eye ER with respect to the reference direction is displayed. The horizontal component image includes a reference image R3 representing a component in the horizontal direction of the reference orientation, and a direction image D3 representing a component in the horizontal direction of the direction of the right eye ER. In FIG. 8A, since the measurement head 100 is rotated in accordance with the convergence of the eye to be examined as described above, the horizontal position of the reference image R3 is substantially the same as the horizontal position of the pupil center position of the right eye ER. It is displayed to do. In the fourth display region PR, a vertical component image representing a component in the vertical direction of the difference in the direction of the right eye ER with respect to the reference direction is displayed. The vertical component image includes a reference image R4 representing a component in the vertical direction of the reference orientation and a direction image D4 representing a component in the vertical direction of the direction of the right eye ER. In the third display region HR and the fourth display region PR, an image representing a scale, a value representing a difference, an amount of the difference, and a direction corresponding to the difference may be displayed.

  For example, as shown in FIG. 8B, a rectangular display area in which the anterior segment image GL is arranged has a scale image indicating the horizontal position of the display area and an image indicating the pupil center position of the left eye EL. BL may be displayed. Similarly, a scale image representing the horizontal position of the display area and an image BR representing the pupil center position of the right eye ER may be displayed in the rectangular display area where the anterior segment image GR is arranged. . Even in this case, the display control unit 201A displays the difference information generated by the difference information generation unit 214 together with the anterior eye image of the eye to be examined acquired by the imaging optical systems 20L and 20R (or the subject controller 300). Can be displayed on the display unit of the controller 310).

  The position specifying unit 215 specifies a position (or a range including the position) in the visual target presentation area of the LCD 11 corresponding to the direction of the eye to be examined specified by the direction specifying unit 211. For example, the position specifying unit 215 determines a position where a straight line extending from a predetermined reference position (for example, an eyeball rotation point) of the eyeball to the direction of the eye to be examined specified by the direction specifying unit 211 intersects the target presentation area of the LCD 11. Ask.

  In addition, when the direction of the eye to be examined is facing the front, it may be assumed that a straight line extending from a predetermined reference position of the eyeball (for example, the eyeball rotation point) passes through the center position in the target display area of the LCD 11. . In this case, the storage unit 202 stores in advance the displacement (displacement direction and displacement amount) from the center position corresponding to the direction of the eye to be examined. The position specifying unit 215 reads the displacement stored in the storage unit 202 corresponding to the obtained orientation of the eye to be examined, and based on the read displacement and the presentation distance of the visual target, the center in the visual target presentation area It is possible to obtain the position in the target presentation area of the LCD 11 based on the position.

  As described above, the position specifying unit 215 obtains the obtained position in the target presentation area of the LCD 11 as the gaze position of the eye to be examined. When the gaze position of the eye to be examined is obtained, the display control unit 201 </ b> A adds the visual target image representing the visual target presented in the visual target presentation area of the LCD 11 within the visual target presentation area specified by the position specifying unit 215. The position images representing the positions are superimposed and displayed on the display unit of the examiner controller 300. The position image includes a point image representing a position in the target presentation area identified by the position identifying unit 215, an image representing a range including the position, and an image indicating the position.

  FIG. 9 shows another example of difference information according to the embodiment. 9, parts that are the same as those in FIG. 8A are given the same reference numerals, and descriptions thereof will be omitted as appropriate.

  The display control unit 201A superimposes the position image on the optotype image representing the optotype presented in the optotype presentation area of the LCD 11 together with the anterior segment image and the difference information shown in FIG. It can be displayed on the display unit. In FIG. 9, a visual target image (perspective image) SL representing a visual target (fixed target) presented to the left eye to be examined EL is arranged below the anterior segment image GL and is presented to the right eye to be examined ER. A visual target image (perspective image) SR representing a target is arranged below the anterior segment image GR. The display control unit 201A superimposes the position image QL on the optotype image SL and displays it on the display unit of the examiner controller 300, and superimposes the position image QR on the optotype image SR and displays it on the display unit of the examiner controller 300. Let

  The optotype presenting optical system 10L receives control from the optotype control unit 201B, and corresponds to a position away from the left eye to be examined EL by a predetermined examination distance (apparent position away from the left eye to be examined EL by a predetermined distance). ) Can present the left gaze target. Similarly, the optotype presenting optical system 10R receives control from the optotype control unit 201B, and corresponds to a position that is away from the right eye ER by the inspection distance (the predetermined distance from the right eye ER). It is possible to present the right gaze target at a distant apparent position. Each of the left gaze target and the right gaze target may be movable.

  The display control unit 201A causes the gaze target image TL to be displayed on the display unit of the controller 300 for the examiner so as to overlap the target image SL at a position corresponding to the presentation position of the left gaze target. In addition, the display control unit 201 </ b> A causes the gaze target image TR to be displayed on the display unit of the controller 300 for the examiner so as to overlap the target image SR at a position corresponding to the presentation position of the right gaze target.

  The refractive power calculation unit 216 calculates the objective value by a known method. For example, the refractive power calculation unit 216 uses a known shape of the ring target image acquired by receiving the return light of the ring-shaped measurement light beam projected onto the fundus oculi Ef by the reflex measurement optical systems 40L and 40R. The objective value is obtained by analyzing the method.

  The characteristic information generation unit 220 generates characteristic information representing the characteristics of the left eye to be examined EL and the right eye to be examined ER.

  The adjustment force characteristic information generation unit 220A generates adjustment force characteristic information representing the adjustment force characteristics of the left eye EL and the right eye ER. The accommodation power characteristic is a characteristic representing a change in the accommodation power of the eye to be examined with respect to a change in the presentation position of the visual target. For example, the control unit 201 causes the reflex measurement optical systems 40L and 40R and the refractive power calculation unit 216 to measure the refractive power a plurality of times while causing the visual target presentation optical systems 10L and 10R to change the target presentation distance. Based on the data acquired by the control performed by the control unit 201, the adjustment force characteristic information generation unit 220A generates characteristic information representing the relationship between the target presentation distance and the refractive power as illustrated in FIG. . The display control unit 201A can display the relationship information generated by the adjustment force characteristic information generation unit 220A on the display unit of the examiner controller 300.

  The rotation characteristic information generation unit 220B generates rotation characteristic information representing the rotation characteristics of the left eye EL and the right eye ER. The rotation characteristic is a characteristic that represents a change in the rotation angle of the eye to be examined with respect to a change in the rotation angle of the measuring head 100. The control unit 201 executes in parallel the change of the target presentation distance by the target presentation optical systems 10L and 10R and the rotation of the left eye inspection unit 120L and the right eye inspection unit by the rotation mechanisms 112L and 112R. The direction specifying unit 211 is made to specify the direction of the eye to be examined a plurality of times. Based on the data acquired by the control performed by the control unit 201, the rotation characteristic information generation unit 220B is based on the presentation distance of the target as shown in FIG. 11 or the left-eye inspection unit 120L and the right-eye inspection unit. Relation information representing the relation between the rotation angle of 120R and the direction of the eye to be examined is generated. The display control unit 201A can display the relationship information generated by the rotation characteristic information generation unit 220B on the display unit of the examiner controller 300.

  The control device 200 executes all operation control and data processing of the ophthalmic examination apparatus 1 in addition to the above control.

  The function of the first target presentation unit 122L is realized by the target presentation optical system 10L included in the left-eye examination unit 120L. The function of the second visual target presenting unit 122R is realized by the visual target presenting optical system 10R included in the right-eye examination unit 120R.

  The function of the first objective measurement unit 123L is realized by the reflex measurement optical system 40L and the kerato measurement optical system 50L included in the left-eye inspection unit 120L. The function of the second objective measurement unit 123R is realized by the reflex measurement optical system 40R and the kerato measurement optical system 50R included in the right-eye inspection unit 120R.

  The visual target presentation optical systems 10L and 10R are examples of the “visual target presentation unit” according to the embodiment. The imaging optical systems 20L and 20R are examples of the “imaging unit” according to the embodiment. The display unit of the examiner controller 300 (or the subject controller 310) is an example of the “display unit” according to the embodiment. The target image SL is an example of a target image representing the “left target” according to the embodiment. The target image SR is an example of a target image representing the “right target” according to the embodiment. The reference image R1, the orientation image D1, the reference image R2, and the orientation image D2 are examples of “left difference information” according to the embodiment. The reference image R3, the orientation image D3, the reference image R4, and the orientation image D4 are examples of “right difference information” according to the embodiment. The alignment optical systems 30L and 30R, the reflex measurement optical systems 40L and 40R, or the optical system that projects the spot light is an example of the “projection system” according to the embodiment. The ref measurement optical systems 40L and 40R and the refractive power calculation unit 216 are examples of the “refractive power measurement unit” according to the embodiment. The accommodation force characteristic information generation unit 220A is an example of a “first relationship information generation unit” according to the embodiment. The left-eye inspection unit 120L and the right-eye inspection unit 120R are examples of the “measurement unit” according to the embodiment. The rotation characteristic information generation unit 220B is an example of a “second relation information generation unit” according to the embodiment.

[Operation example]
Next, the operation of the ophthalmic examination apparatus 1 according to the embodiment will be described.

  FIG. 12 shows an overall flowchart of an operation example of the ophthalmic examination apparatus 1.

(S1)
Upon receiving a predetermined operation on the examiner controller 300 or the subject controller 310, the control device 200 starts operation. The subject fixes his face to a forehead (not shown) so that objective measurement and subjective examination can be performed. The position of the forehead pad itself may be adjusted automatically or manually. The control device 200 performs alignment for the left and right eyes. That is, the control device 200 performs alignment of the optical system of the left-eye inspection unit 120L with respect to the left eye EL by the alignment optical system 30L. Further, the control device 200 performs alignment of the optical system of the right-eye inspection unit 120R with respect to the right eye ER using the alignment optical system 30R.

(S2)
The control device 200 performs kerato measurement as described above for each of the left eye EL and the right eye ER using the kerato measurement optical systems 50L and 50R. Results of kerato measurement for each of the left eye EL and the right eye ER are stored in the storage unit 202.

(S3)
The control device 200 performs the reflex measurement as described above for each of the left eye EL and the right eye ER by the reflex measurement optical systems 40L and 40R. The result of the reflex measurement for each of the left eye to be examined EL and the right eye to be examined ER is stored in the storage unit 202.

(S4)
The control device 200 controls the target presentation optical systems 10L and 10R to display the target selected by the examiner or the control device 200 on the LCD 11 of the target presentation optical systems 10L and 10R. Thereby, the visual target is presented to the subject. The subject responds to the target. Upon receiving the response content, the control device 200 performs further control and calculation of a subjective test value. The processing content of S4 will be described later.

(S5)
The control device 200 uses at least one of the result of the kerato measurement obtained in S2, the result of the reflex measurement obtained in S3, and the result of the subjective examination obtained in S4 for the examiner controller 300 or the subject. It is displayed on the display unit of the controller 310. This is the end of the operation of the ophthalmic examination apparatus 1 (end).

  FIG. 13 shows a flowchart of an operation example of S4 of FIG. FIG. 13 shows a flowchart of an operation example of the ophthalmic examination apparatus 1 when performing a distance subjective examination or a near-distance subjective examination.

(S11)
First, the control unit 201 sets the target presentation distance. The presentation distance may be specified by an operation on the examiner controller 300 or the subject controller 310. Further, the control device 200 may set the presentation distance according to a predetermined measurement sequence.

(S12)
The target control unit 201B causes the target presentation optical systems 10L and 10R to present a predetermined target at a position where the distance between the eye to be examined and the target is the presentation distance set in S11.

(S13)
The control unit 201 causes the reference direction specifying unit 212 to specify the reference direction of the left eye E and the reference direction of the right eye ER. The reference orientation specifying unit 212 uses Expression (3) from the presentation distance set in S11 and half of the interpupillary distance of the subject as the reference orientation of the left eye to be examined EL and the reference orientation of the right eye to be examined ER. The convergence angle of the left eye E and the convergence angle of the right eye ER are obtained. At this time, the distance between the pupils of the subject may be a predetermined standard distance, or between the pupil center (center of gravity) position of the left subject eye EL and the pupil center (center of gravity) position of the right subject eye ER. It may be obtained by separately measuring the distance.

(S14)
The control unit 201 causes the direction specifying unit 211 to specify the direction of the left eye to be examined EL and the direction of the right eye to be examined ER. For example, the orientation identifying unit 211 acquires and acquires an anterior ocular segment image of the left subject eye EL in which a virtual image on a spot formed inside the cornea is depicted by projecting an infrared parallel light beam onto the left subject eye EL. The anterior segment image is analyzed. The orientation identifying unit 211 identifies the orientation of the position of the center of the cornea with respect to the eyeball rotation point of the left eye to be examined EL obtained by analysis as the orientation of the left eye to be examined EL. Similarly, the orientation specifying unit 211 acquires an anterior ocular segment image of the right eye ER in which a virtual image on a spot formed inside the cornea is projected by projecting an infrared parallel light beam onto the right eye ER, The acquired anterior segment image is analyzed. The orientation identifying unit 211 identifies the orientation of the position of the center of the cornea with respect to the eyeball rotation point of the right eye ER obtained by analysis as the orientation of the right eye ER.

(S15)
Based on the orientation of the left eye to be examined EL specified in S14, the control unit 201 sets the gaze position (or a range including the position) within the target presentation area of the LCD 11 of the left-eye examination unit 120L as the position specifying unit 215. Let me specify. Similarly, the control unit 201 positions the gaze position (or a range including the position) in the target presentation area of the LCD 11 of the right-eye examination unit 120R based on the direction of the right eye ER identified in S14. The specifying unit 215 is made to specify.

(S16)
The display control unit 201 </ b> A displays the position in the target presentation area identified in S <b> 15 in the target image representing the target presented in the target presentation area of the LCD 11 for each of the left eye EL and the right eye ER. Is displayed on the display unit of the controller 300 for the examiner. Accordingly, as shown in FIG. 9, the position images QL and QR are superimposed and displayed on the target images SL and SR, so that the gaze position of the examiner or the subject can be confirmed. At this time, the target control unit 201B may perform control for making it possible to identify the target corresponding to the position in the target presentation area of the LCD 11 specified in S15. For example, the target control unit 201B changes the display color of the target corresponding to the position, displays the target corresponding to the position so as to surround the frame, or points to the target corresponding to the position. Display an image (arrow image).

(S17)
Subsequently, the control unit 201 causes the difference information generation unit 214 to generate difference information indicating the difference in the orientation of the eye to be examined specified in S14 with respect to the reference direction specified in S13. Specifically, the difference information generation unit 214 generates difference information indicating a difference in the orientation of the left eye E with respect to the reference orientation of the left eye EL. Similarly, the difference information generation unit 214 generates difference information indicating a difference in the direction of the right eye ER with respect to the reference direction of the right eye ER.

  The difference information generation unit 214 generates a first component image representing a difference component in the horizontal direction and a second component image representing a component in the vertical direction for each of the left eye to be examined EL and the right eye to be examined ER. The first component image of the left eye to be examined EL includes a reference image R1 representing a component in the horizontal direction of the reference orientation of the left eye to be examined EL, and a direction image D1 representing a component in the horizontal direction of the direction of the left eye to be examined EL. The second component image of the left eye to be examined EL includes a reference image R2 representing a component in the vertical direction of the reference orientation of the left eye to be examined EL and a direction image D2 representing a component in the direction of the left eye to be examined EL in the vertical direction. The first component image of the right eye ER includes a reference image R3 that represents the component in the horizontal direction of the reference direction of the right eye ER, and a direction image D3 that represents the component of the direction of the right eye ER in the horizontal direction. The second component image of the right eye ER includes a reference image R3 that represents a component in the vertical direction of the reference direction of the right eye ER, and a direction image D4 that represents a component of the right eye ER in the vertical direction. As shown in FIG. 9, the display control unit 201 </ b> A displays the reference images R <b> 1 and R <b> 2 and the orientation images D <b> 1 and D <b> 2 together with the anterior segment image of the left eye EL to be displayed on the display unit of the controller 300 for the examiner. Further, as shown in FIG. 9, the display control unit 201 </ b> A displays the reference images R <b> 3 and R <b> 4 and the orientation images D <b> 3 and D <b> 4 on the display unit of the examiner controller 300 together with the anterior eye image of the right eye ER. This is the end of the operation of the ophthalmic examination apparatus 1 (end).

  Thereby, the examiner can confirm the reference orientation of the eye to be examined and the orientation of the eye to be examined during the subjective examination. At this time, the examiner can confirm the relationship between the rotation state of the subject's eye and the fusion state of the chief complaint by causing the subject to answer the fusion state. For example, it is possible to observe the eye position when measuring the vergence divergence force while confirming the adjustment state.

  In addition, by changing the presentation position of the target from a distant place to a close place, the adjustment force characteristic information as shown in FIG. 10 is acquired, or the rotation characteristic information as shown in FIG. 11 is acquired. The person can confirm the visual function of the eye to be examined in detail.

  In FIG. 14, the operation | movement flowchart of the ophthalmic examination apparatus 1 for acquiring the adjustment force characteristic information which concerns on embodiment is shown.

(S21)
First, the control unit 201 sets the target presentation distance. The presentation distance may be specified by an operation on the examiner controller 300 or the subject controller 310. Further, the control device 200 may set the presentation distance according to a predetermined measurement sequence.

(S22)
The target control unit 201B causes the target presentation optical systems 10L and 10R to start presenting a predetermined target at a position where the distance between the eye to be examined and the target is the presentation distance set in S21.

(S23)
For example, in the reflex measurement optical systems 40L and 40R, the control unit 201 projects a ring-shaped measurement light beam on the fundus for each of the left eye to be examined EL and the right eye to be examined ER, and returns the returned light of the projected ring-shaped measurement light beam to the CCD 21. To receive light. The control unit 201 causes the refractive power calculation unit 216 to calculate the objective value as the adjustment force by analyzing the shape of the ring visual target image acquired by the CCD 21 using a known method.

(S24)
The control unit 201 determines whether or not to finish obtaining the adjustment force. The adjustment force characteristic information is obtained by measuring the adjustment force within a predetermined presentation distance range. Therefore, the control unit 201 can determine whether or not to end the acquisition of the adjustment force by determining whether or not the present target distance is within a predetermined range of the target distance. is there. When it is determined that the acquisition of the adjustment force is finished (S24: Y), the operation of the ophthalmic examination apparatus 1 proceeds to S26. When it is determined not to end the acquisition of the adjustment force characteristic information (S24: N), the operation of the ophthalmic examination apparatus 1 proceeds to S25.

(S25)
When it is determined that the acquisition of the adjustment force is not finished (S24: N), the target control unit 201B controls the LCD 11 so as to present the target at a position where the presenting position is close by a predetermined step in the near direction. To do. The operation of the ophthalmic examination apparatus 1 proceeds to S23.

(S26)
When it is determined that the acquisition of the adjustment force is to be ended (S24: Y), the control unit 201 causes the adjustment force characteristic information generation unit 220A to display the adjustment force characteristic information representing the adjustment force characteristics of the left eye EL and the right eye ER. Is generated. The display control unit 201A causes the display unit of the examiner's controller 300 to display adjustment force characteristic information indicating the relationship between the target presentation distance and the adjustment force as illustrated in FIG. This is the end of the operation of the ophthalmic examination apparatus 1 (end).

  For example, in FIG. 10, the adjustment force follows the target presentation position (fixation position) up to the presentation position K1, but the adjustment force follows the presentation position of the visual target when approaching the eye to be examined beyond the presentation position K1. Can not do. Accordingly, it is possible to determine whether there is a possibility of presbyopia based on the presentation position of the target while confirming the relationship between the rotation state of the eye to be examined and the fusion state of the chief complaint.

  FIG. 15 shows an operation flowchart of the ophthalmic examination apparatus 1 for acquiring the rotation characteristic information according to the embodiment.

(S31)
First, the control unit 201 sets an index presentation distance. The presentation distance may be specified by an operation on the examiner controller 300 or the subject controller 310. Further, the control device 200 may set the presentation distance according to a predetermined measurement sequence.

(S32)
The target control unit 201B causes the target presentation optical systems 10L and 10R to start presenting a predetermined target at a position where the distance between the eye to be examined and the target is the presentation distance set in S31.

(S33)
The control unit 201 causes the calculation unit 210 (reference orientation specifying unit 212) to calculate the rotation angle of the measurement head using Expression (3). The subject's interpupillary distance used in Equation (3) may be a predetermined standard value or may be obtained by separately measuring.

(S34)
The control unit 201 controls the rotation mechanisms 112L and 112R to rotate the left eye inspection unit 120L and the right eye inspection unit 120R by the rotation angle obtained in S33.

(S35)
Subsequently, the control unit 201 causes the direction specifying unit 211 to specify the direction of the left eye EL and the direction of the right eye ER (the rotation angle of the eye to be examined), for example, similarly to S14.

(S36)
The control unit 201 determines whether or not to end the rotation angle acquisition. The rotation characteristic information is obtained by measuring the rotation angle of the eye to be examined within a predetermined presentation distance. Therefore, the control unit 201 can determine whether or not to end the acquisition of the rotation angle by determining whether or not the present target distance is within a predetermined range. is there. When it is determined that the acquisition of the rotation angle is finished (S36: Y), the operation of the ophthalmic examination apparatus 1 proceeds to S36. When it is determined not to end the rotation angle acquisition (S36: N), the operation of the ophthalmic examination apparatus 1 proceeds to S37.

(S37)
When it is determined not to end the rotation angle acquisition (S36: N), the target control unit 201B controls the LCD 11 so as to present the target at a position where the presenting position is close to the predetermined direction in the near direction. To do. The operation of the ophthalmic examination apparatus 1 proceeds to S33.

(S38)
When it is determined that the acquisition of the rotation angle is finished (S36: Y), the control unit 201 causes the rotation characteristic information generation unit 220B to generate rotation characteristic information representing the rotation characteristics of the left eye EL and the right eye ER. . The display control unit 201 </ b> A causes the display unit of the examiner's controller 300 to display the rotation characteristic information indicating the relationship between the rotation angle of the measurement head 100 and the rotation angle of the eye to be examined as shown in FIG. 11. This is the end of the operation of the ophthalmic examination apparatus 1 (end).

  For example, in FIG. 11, the eye can be focused by converging both eyes up to the rotation angle ω2 of the measuring head 100, but when the rotation angle ω2 is exceeded (when the presentation distance of the target becomes short), the right eye ER Cannot follow. That is, it is possible to determine that there is a possibility that there is an abnormality in the convergence function of the right eye ER. As described above, whether or not the convergence function of both eyes is normal based on the rotation angle of the measuring head 100 (presentation position of the visual target) while confirming the relationship between the rotation state of the subject eye and the fusion state of the chief complaint. Can be judged.

  In the embodiment, the description has been made on the assumption that separate targets are presented to the left eye EL and the right eye ER, respectively, but a single eye chart is presented to the left eye EL and the right eye ER. May be.

[effect]
The effect of the ophthalmic examination apparatus according to the embodiment will be described.

  The ophthalmic examination apparatus (ophthalmic examination apparatus 1) according to the embodiment includes a target presentation unit (target presentation optical systems 10L and 10R), a photographing unit (photographing optical systems 20L and 20R), and a direction identification unit (direction identification unit). 211) and a display control unit (display control unit 201A). The optotype presenting unit presents the optotype to the eye to be examined (left eye to be examined EL, right eye to be examined ER). The imaging unit images the anterior segment of the eye to be examined. The direction specifying unit specifies the direction of the eye to be examined. The display control unit has acquired, by the imaging unit, difference information representing a difference in the orientation of the eye to be examined, which is specified by the direction specifying unit with respect to the reference direction corresponding to the presentation distance of the target presented by the target presenting unit. The anterior eye image (anterior eye image GL, GR) of the eye to be examined is displayed on the display means (the display part of the controller 300 for the examiner).

  According to such a configuration, the direction of the eye to be examined in which the visual target is presented is specified, and difference information indicating the difference in the direction of the eye to be examined with respect to the reference direction corresponding to the presentation distance of the visual target is displayed in front of the eye to be examined. Since it is displayed on the display means together with the eye part image, the relationship between the rotation state of the eye to be examined and the fusion state of the chief complaint can be easily confirmed. For example, it is possible to observe the eye position when measuring the vergence divergence force while confirming the adjustment state.

  In the ophthalmic examination apparatus according to the embodiment, the optotype presenting unit presents the left optotype to the left eye to be examined (left eye to be examined EL), and the right optotype to the right eye to be examined (right eye to be examined ER). The imaging unit captures the anterior eye part of the left eye to be examined and the anterior eye part of the right eye to be examined. The orientation identifying part identifies the orientation of the left eye to be examined and the right eye to be examined. The display control unit has acquired the left difference information representing the difference in the orientation of the left eye to be identified, which is specified by the direction specifying unit with respect to the reference direction corresponding to the presentation distance of the left target, by the imaging unit. Right difference information representing the difference in the orientation of the right eye to be displayed on the display unit together with the anterior eye image of the left eye to be examined, and specified by the orientation specifying unit with respect to the reference orientation corresponding to the presentation distance of the right target, You may display on a display means with the anterior eye part image of the right eye to be examined acquired by the imaging | photography part.

  According to such a configuration, for both eyes, the direction of the eye to be examined on which the target is presented is specified, and difference information representing the difference in the direction of the eye to be examined with respect to the reference direction corresponding to the presentation distance of the target is obtained. Since it is displayed on the display means together with the anterior segment image of the eye to be examined, the relationship between the rotational state of both eyes and the fused state of the chief complaint can be easily confirmed.

  Moreover, the ophthalmic examination apparatus according to the embodiment may include a reference direction specifying unit (reference direction specifying unit 212) that specifies the reference direction based on the presentation distance.

  According to such a configuration, since the reference orientation is specified based on the presentation distance of the target, it becomes possible to obtain difference information representing the difference in the orientation of the eye to be examined with respect to the reference orientation with a simple process. .

  The ophthalmic examination apparatus according to the embodiment includes an interpupillary distance acquisition unit (interpupillary distance acquisition unit 213) that acquires the interpupillary distance of the subject, and the reference orientation specifying unit determines the presentation distance and the interpupillary distance. The reference orientation may be specified using trigonometry.

  According to such a configuration, the interpupillary distance of the subject is acquired, and the reference orientation is specified by trigonometry based on the target presentation distance and the acquired interpupillary distance. It becomes possible to obtain the difference information representing the difference in the direction of the optometry with high accuracy by a simple process.

  In the ophthalmic examination apparatus according to the embodiment, the orientation specifying unit analyzes the anterior ocular segment image acquired by the imaging unit to obtain the position of the feature point of the anterior ocular segment, and based on the obtained position, the eye to be examined You may specify the direction.

  According to such a configuration, since the direction of the eye to be examined is specified based on the position of the feature point of the anterior segment image of the eye to be examined, the difference information can be obtained with high accuracy with a simple process. Become.

  The ophthalmic examination apparatus according to the embodiment includes a projection system (alignment optical systems 30L and 30R, reflex measurement optical systems 40L and 40R, or an optical system that projects spot light) that projects a light beam onto the eye to be examined, and an orientation specifying unit. May analyze the anterior segment image acquired by the imaging unit to determine the position of the image based on the luminous flux, and specify the direction of the eye to be examined based on the determined position.

  According to such a configuration, since the direction of the eye to be examined is specified based on the position of the image based on the light flux from the projection system depicted in the acquired anterior segment image, the difference information is simply processed. Can be obtained with high accuracy.

  In the ophthalmic examination apparatus according to the embodiment, the difference information includes a first component image representing a component of the difference in the first direction (horizontal direction) and a component in the second direction (vertical direction) orthogonal to the first direction. And a second component image to be represented.

  According to such a configuration, since the image representing the difference information in the first direction and the second direction is displayed on the display unit, the difference component can be easily confirmed.

  In the ophthalmic examination apparatus according to the embodiment, the difference information may include a reference image (reference image R1 to R4) indicating the reference direction and a direction image (direction image D1 to D4) indicating the direction of the eye to be examined. .

  According to such a configuration, since the difference information is represented by the reference image and the orientation image, it is possible to easily confirm the displacement direction and the displacement amount of the direction of the eye to be examined with respect to the reference orientation.

  In the ophthalmic examination apparatus according to the embodiment, the reference image includes a first reference image (reference images R1 and R3) representing a component in the first direction of the reference direction and a component in the second direction orthogonal to the first direction. The orientation image includes a first orientation image (orientation image D1, D3) representing a component in the first direction of the direction of the eye to be examined, and a component in the second direction. And second orientation images (orientation images D2 and D4) representing.

  According to such a configuration, since the difference information is represented by the reference image and the orientation image for each of the first direction and the second direction, the displacement direction component and the displacement amount component of the direction of the eye to be examined with respect to the reference orientation. Can be easily confirmed.

  In the ophthalmic examination apparatus according to the embodiment, the difference information may include a value indicating the reference direction and a value indicating the direction of the eye to be examined.

  According to such a configuration, it is possible to easily confirm the displacement direction and the displacement amount of the direction of the eye to be examined with respect to the reference direction.

  In addition, the ophthalmic examination apparatus according to the embodiment specifies a position specifying unit (position specifying unit 215) that specifies a position in the target presentation area by the target presentation unit based on the direction of the eye to be examined specified by the direction specifying unit. The display control unit includes a position image representing the position specified by the position specifying unit in the target image (target image SR, SL) representing the target presented to the eye to be examined by the target presenting unit. (Position images QL, QR) may be superimposed and displayed on the display means.

  According to such a configuration, it becomes possible to easily confirm the relationship between the gaze position of the eye to be examined and the state of rotation of the eye to be examined and the fusion state of the chief complaint.

  Further, in the ophthalmic examination apparatus according to the embodiment, the optotype presenting unit can change the presentation distance of the optotype, and the refractive power measuring unit (reflective measurement optical systems 40L and 40R and the refractive index) that measures the refractive power of the eye to be examined. Force calculation unit 216), a control unit (control unit 201) that causes the refractive power measurement unit to measure the refractive power multiple times while changing the presentation distance to the target presentation unit, and a control performed by the control unit. A first relationship information generation unit (accommodation force characteristic information generation unit 220A) that generates first relationship information (adjustment force characteristic information) that represents the relationship between the presentation distance and the refractive power based on the obtained data. The unit may cause the display unit to display the first relationship information generated by the first relationship information generation unit.

  According to such a configuration, it is possible to confirm information representing the relationship between the target presentation distance and the adjustment force while confirming the relationship between the rotation state of the eye to be examined and the fusion state of the chief complaint. Thereby, for example, it becomes possible to determine whether there is a possibility of presbyopia based on the presentation position of the visual target.

  Further, in the ophthalmic examination apparatus according to the embodiment, the optotype presenting unit can change the presentation distance of the optotype, and the measurement unit (the left-eye examination unit 120L, the right eye) in which the optotype presenting unit and the photographing unit are stored. The eye inspection unit 120R), the rotation mechanism (rotation mechanisms 112L and 112R) for rotating the measurement unit, the change of the presentation distance by the target presentation unit and the rotation of the measurement unit by the rotation mechanism are performed in parallel. Control unit (control unit 201) that causes the orientation specifying unit to specify the direction of the eye to be examined a plurality of times, and the rotation of the presentation distance or the measurement unit based on the data acquired by the control performed by the control unit A second relationship information generation unit (rotation property information generation unit 220B) that generates second relationship information (rotation property information) representing the relationship between the angle and the direction of the eye to be examined, and the display control unit includes the second relationship. By the information generator The second relation information has been made may be displayed on the display means.

  According to such a configuration, it is possible to confirm information indicating the relationship between the rotation angle of the measurement unit and the orientation of the eye to be examined while confirming the relationship between the rotation state of the eye to be examined and the fusion state of the chief complaint. become. Thereby, for example, it is possible to determine whether or not the convergence function of the visual target is normal based on the rotation angle of the measurement unit (presentation position of the visual target).

[Others]
The above-described embodiment is not limited to the configuration of the optical system described with reference to FIG. 3, the configuration of the control system described with reference to FIGS. For example, the objective measurement may include objective measurement for measuring a value relating to the eye to be examined and photographing for acquiring an image of the eye to be examined. Examples of such objective measurement include objective refraction measurement, corneal shape measurement, intraocular pressure measurement, fundus imaging, and OCT (Optical Coherence Tomography) measurement using an OCT technique. The subjective examination includes, for example, a subjective refraction measurement such as a distance examination, a near examination, a contrast examination, and a glare examination, and a visual field examination.

  In addition, the ophthalmic examination apparatus according to the embodiment can execute a distance test, a near-field test, a contrast test, a glare test, and the like as a subjective test, and an objective refraction measurement and a corneal shape measurement as an objective measurement. Or an apparatus capable of performing OCT measurement or the like. In the OCT measurement, eyeball information representing the structure of the subject's eye such as the axial length, corneal thickness, anterior chamber depth, and lens thickness may be acquired.

  The configuration described above is merely an example for favorably implementing the present invention. Therefore, arbitrary modifications (omitted, substituted, added, etc.) within the scope of the present invention can be made as appropriate.

1 Ophthalmic Examination Device 10L, 10R Target Presentation Optical System 20L, 20R Imaging Optical System 100 Measuring Head 120L Left Eye Examination Unit 120R Right Eye Examination Unit 200 Controller 201A Display Control Unit 201B Visual Target Control Unit 211 Orientation Identification Unit 212 Reference orientation identification unit 213 Interpupillary distance acquisition unit 214 Difference information generation unit 215 Position identification unit 216 Refractive power calculation unit 220 Characteristic information generation unit 220A Adjustment force characteristic information generation unit 220B Rotation characteristic information generation unit

Claims (13)

A target presentation unit for presenting a target to the eye to be examined;
An imaging unit for imaging the anterior segment of the eye to be examined;
An orientation identifying unit that identifies the orientation of the eye to be examined;
Difference information representing a difference in the orientation of the eye to be examined specified by the orientation specifying unit with respect to a reference orientation corresponding to the presentation distance of the target presented by the target presentation unit is acquired by the imaging unit. A display control unit for displaying on the display unit together with the anterior segment image of the eye to be examined;
Including ophthalmic examination equipment. The target presentation unit presents a left target to the left eye and presents a right target to the right eye;
The imaging unit captures the anterior segment of the left eye and captures the anterior segment of the right eye;
The orientation identifying unit identifies the orientation of the left eye to be examined, and identifies the orientation of the right eye to be examined;
The display control unit has acquired the left difference information indicating the difference in the orientation of the left eye to be identified specified by the orientation specifying unit with respect to a reference orientation corresponding to the presentation distance of the left target, acquired by the imaging unit. The right representing the difference in the orientation of the right eye to be displayed on the display unit together with the anterior eye image of the left eye and identified by the orientation identifying unit relative to the reference orientation corresponding to the presentation distance of the right target The ophthalmic examination apparatus according to claim 1, wherein difference information is displayed on the display unit together with an anterior segment image of the right eye to be examined acquired by the imaging unit. The ophthalmic examination apparatus according to claim 1, further comprising a reference direction specifying unit that specifies the reference direction based on the presentation distance. Including an interpupillary distance acquisition unit for acquiring the interpupillary distance of the subject;
The ophthalmic examination apparatus according to claim 3, wherein the reference orientation specifying unit specifies the reference orientation using trigonometry based on the presentation distance and the interpupillary distance. The orientation specifying unit analyzes the anterior segment image acquired by the imaging unit to determine the position of the feature point of the anterior segment, and specifies the orientation of the eye to be examined based on the determined position. The ophthalmic examination apparatus according to any one of claims 1 to 4, wherein: Including a projection system that projects a light beam onto the eye to be examined;
The orientation specifying unit analyzes the anterior segment image acquired by the imaging unit to determine the position of the image based on the luminous flux, and specifies the direction of the eye to be examined based on the determined position. The ophthalmic examination apparatus according to any one of claims 1 to 4. The difference information includes a first component image representing a component of the difference in a first direction and a second component image representing a component in a second direction orthogonal to the first direction. The ophthalmic examination apparatus according to any one of claims 6 to 7. The ophthalmic examination apparatus according to any one of claims 1 to 6, wherein the difference information includes a reference image representing the reference orientation and a orientation image representing the orientation of the eye to be examined. The reference image includes a first reference image representing a component in the first direction of the reference direction, and a second reference image representing a component in a second direction orthogonal to the first direction,
The said orientation image contains the 1st orientation image showing the component in the said 1st direction of the direction of the said test eye, and the 2nd orientation image showing the component in the said 2nd direction. Ophthalmic examination equipment. The ophthalmic examination apparatus according to any one of claims 1 to 9, wherein the difference information includes a value representing the reference orientation and a value representing the orientation of the eye to be examined. Based on the orientation of the eye to be examined specified by the orientation specifying unit, including a position specifying unit for specifying a position in the presentation area of the target by the target presentation unit;
The display control unit superimposes a position image representing the position identified by the position identifying unit on a target image representing the target presented to the eye to be examined by the target presentation unit. The ophthalmic examination apparatus according to claim 1, wherein the ophthalmic examination apparatus is displayed. The target presentation unit can change the presentation distance of the target,
A refractive power measurement unit for measuring refractive power on the eye to be examined;
A control unit that causes the refractive power measurement unit to measure the refractive power a plurality of times while changing the presentation distance to the target presentation unit;
A first relationship information generating unit that generates first relationship information representing a relationship between the presentation distance and the refractive power based on data acquired by the control performed by the control unit;
Including
The said display control part displays the said 1st relationship information produced | generated by the said 1st relationship information generation part on the said display means. The ophthalmology as described in any one of Claims 1-11 characterized by the above-mentioned. Inspection device. The target presentation unit can change the presentation distance of the target,
A measurement unit in which the target presentation unit and the photographing unit are stored;
A rotation mechanism for rotating the measurement unit;
A control unit that causes the orientation specifying unit to specify the orientation of the eye to be examined a plurality of times while concurrently executing the change of the presentation distance by the target presentation unit and the rotation of the measurement unit by the rotation mechanism; ,
Second relationship information generation for generating second relationship information representing the relationship between the presentation distance or the rotation angle of the measurement unit and the direction of the eye to be examined based on data acquired by the control performed by the control unit And
Including
The ophthalmology according to any one of claims 1 to 12, wherein the display control unit causes the display unit to display the second relationship information generated by the second relationship information generation unit. Inspection device.

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