JP2018042761A - Ophthalmologic examination apparatus - Google Patents

Abstract

An ophthalmic examination apparatus capable of performing an ophthalmic examination in a state closer to natural vision is provided. An ophthalmic examination apparatus includes an information presentation system and a control unit. The information presentation system includes a left display unit that displays information presented to the left eye and a right display unit that displays information presented to the right eye. The control unit presents the left gaze target at an apparent position that is a predetermined distance away from the left eye to be examined and an information presentation system that presents the right gaze target at an apparent position that is a predetermined distance away from the right eye to be examined. The left perspective image and the right perspective image that are controlled and corresponding to the binocular parallax corresponding to the predetermined distance are displayed on the left display unit and the right display unit, respectively. [Selection] 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 discloses an ophthalmic examination apparatus in which a liquid crystal display capable of displaying various visual targets is stored in a main body, and a subjective examination and an objective measurement can be performed on both eyes. In this ophthalmic examination apparatus, a landscape chart is presented as a fixation target to each of both eyes, and subjective examination and objective measurement are simultaneously executed for both eyes.

Japanese Patent No. 4302525

  However, in the ophthalmic examination apparatus disclosed in Patent Literature 1, the same fixation target is presented to both eyes regardless of the fixation target presentation distance from the eye to be examined, and the fixation target presented to both eyes has parallax. Not provided. This makes it difficult to perform objective measurement in a state close to natural vision, which may be one of the factors that reduce the reliability of the objective measurement result.

  The present invention has been made in view of such circumstances, and an object thereof is to provide an ophthalmic examination apparatus capable of performing an ophthalmic examination in a state closer to natural vision.

  The ophthalmic examination apparatus according to the embodiment includes an information presentation system and a control unit. The information presentation system includes a left display unit that displays information presented to the left eye and a right display unit that displays information presented to the right eye. The control unit presents the left gaze target at an apparent position that is a predetermined distance away from the left eye to be examined and an information presentation system that presents the right gaze target at an apparent position that is a predetermined distance away from the right eye to be examined. The left perspective image and the right perspective image that are controlled and corresponding to the binocular parallax corresponding to the predetermined distance are displayed on the left display unit and the right display unit, respectively.

  According to the ophthalmic examination apparatus according to the present invention, an ophthalmic examination can be performed in a state closer to natural vision.

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. 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. Explanatory drawing of the optotype image which concerns on embodiment. Explanatory drawing of the optotype image which concerns on embodiment. Explanatory drawing of the optotype image which concerns on embodiment. Explanatory drawing of the optotype image which concerns on embodiment. Explanatory drawing of the optotype image which concerns on embodiment. Explanatory drawing of the optotype image 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 for measuring objective refraction 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. 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. 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 target presentation optical system 10L presents the left gaze target at a position corresponding 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). The optotype presenting optical system 10R presents the right gaze target at a position corresponding to a position away from the right eye ER by the above-described examination distance (apparent position away from the right eye ER by the predetermined distance).

  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 the left eye inspection unit 120L and the right eye inspection unit 120R, objective optometry, subjective optometry, and the like under the control of the control system described later. It is supposed to be. 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 by the objective measurement are used.

[Control system]
Next, a control system of the ophthalmic examination apparatus 1 according to the embodiment will be described with reference to FIG. The block diagram shown in FIG. 4 represents a schematic configuration of the main part of the control system of the ophthalmic examination apparatus 1. 4, parts that are the same as those in FIGS. 1 to 3 are given the same reference numerals, and descriptions thereof will be 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. The image data of the optotype pattern is optotype image data 202A which is image data of the optotype presented to the left eye to be examined EL and the right eye to be examined ER. For example, the target image data 202A includes image data of a plurality of targets corresponding to a plurality of inspection distances. These image data may be image data generated in advance, or image data generated based on the changed inspection distance every time the inspection distance is changed.

  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 target control unit 201B presents the left gaze target at a position corresponding to a position away from the left eye to be examined EL by a predetermined examination distance, and a position equivalent to a position away from the right eye to be examined ER by the examination distance. The visual target presenting optical systems 10L and 10R are controlled so as to present the right gaze target to the user. Further, the target control unit 201B displays the left perspective image and the right perspective image corresponding to the binocular parallax corresponding to the inspection distance on the LCD 11 of the target presentation optical system 10L and the LCD 11 of the target presentation optical system 10R, respectively. Let Hereinafter, for convenience of explanation, the LCD 11 of the target presentation optical system 10L may be referred to as “left LCD 11”, and the LCD 11 of the target presentation optical system 10R may be referred to as “right LCD 11”.

  The optotype control unit 201B can control the LCD 11 to move at least one of the left gaze target and the right gaze target in a direction orthogonal to the optical axis of the target presentation optical system 10L or the target presentation optical system 10R. Is possible. That is, the optotype control unit 201B can control the left LCD 11 so that the position of the left gaze target moves in the left perspective image. Further, the visual target control unit 201B can control the right LCD 11 so that the position of the right gaze target moves in the right perspective image. The target control unit 201B can control the LCD 11 as described above for confirmation of the subjective examination.

  The optotype control unit 201B displays at least one of the left gaze target and the right gaze target based on the operation signal (signal) based on the operation content with respect to the controller 300 for the examiner or the controller 310 for the subject. The LCD 11 can be controlled to move in a direction orthogonal to the optical axes of 10L and 10R. Thereby, the examiner or the like can specify the position of the left gaze target or the right gaze target.

  The target control unit 201B has an examination distance from the left eye to be examined EL (or a position corresponding 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 prescribed distance). ) To control the left LCD 11 so as to change the size of the left gaze target. Similarly, the optotype control unit 201 </ b> B has an examination distance from the right eye ER (or a position corresponding to a position away from the right eye ER by a predetermined examination distance (an apparent distance away from the right eye ER by a predetermined distance). The right LCD 11 can be controlled so as to change the size of the right gaze target in accordance with the position)). The target control unit 201B may change the size of at least one of the left gaze target and the right gaze target.

  It is necessary to perform objective measurement so that the measurement accuracy is not affected even if the alignment state changes due to the movement of the eye to be examined. Since the operation principle of alignment using the optical system described above, the measurement principle of subjective examination, the measurement principle of objective measurement, the measurement principle of corneal shape, the display control of the target on the LCD, etc. are already known, the detailed explanation is as follows. 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.

  In addition, the calculation unit 210 includes an image processing unit 210A. The image processing unit 210A performs predetermined image processing on at least a part of the visual target image based on the image data stored in the storage unit 202. In particular, the image processing unit 210A performs blurring processing on at least a part of the target image. The blurring process is a process of averaging the pixel value at the pixel position using the pixel value and one or more pixel values at surrounding pixel positions. For example, the image processing unit 210 </ b> A performs a blurring process on a region corresponding to a far distance for a near visual target image having a short examination distance. Further, for example, the image processing unit 210A performs a blurring process on a region corresponding to a near distance for a long target image having a long inspection distance. That is, the image processing unit 210A can perform blurring processing on at least a part of the target image according to the inspection distance.

  Note that the image processing performed on the target image may include at least one of edge enhancement processing, brightness adjustment processing, size conversion processing, masking processing, and region extraction processing. In this case, the image processing unit 210A performs at least one of these image processes on at least a part of the visual target image.

  In the configuration as described above, the control unit 201 rotates the left-eye inspection unit 120L and the right-eye inspection unit 120R in opposite directions around the eyeball rotation points of the left and right eye to be examined according to the inspection distance. Further, the control unit 201 (target control unit 201B) causes a pair of targets having binocular parallax corresponding to the examination distance to be simultaneously presented to the left and right eyes.

  FIG. 5 is an explanatory diagram of the rotation control of the left-eye inspection unit 120L and the right-eye inspection unit 120R according to the embodiment. FIG. 5 schematically shows the measuring head 100 as viewed from above. In FIG. 5, the same parts as those in FIG.

  For example, when the examination distance L is designated by the examiner operating the examiner's controller 300, the control unit 201 moves left based on the examinee's interpupillary distance PD and the examination distance L. The rotation angle θ of the eye inspection unit 120L and the right eye inspection unit 120R is obtained. The inter-pupil distance PD may be a standard distance or obtained by measuring the distance between the pupil center (centroid) position of the left eye EL and the pupil center (centroid) position of the right eye ER. It may be. The standard distance may be a distance defined by the model eye. Model eyes include Gullstrand model eyes. The inspection distance may be specified by the control unit 201 according to a predetermined inspection sequence, or may be specified by the subject operating the subject controller 310.

  When the distance half of the inter-pupil distance PD is hPD, the rotation angle θ can be obtained by the equation (1).

  The control unit 201 rotates each of the left-eye inspection unit 120L and the right-eye inspection unit 120R in the opposite directions about the eyeball rotation point by the rotation angle θ obtained by Expression (1). Thereby, the eye to be examined can be converged (or spread).

  FIG. 6 is an explanatory diagram of the inspection distance according to the embodiment. FIG. 6 schematically shows a specific gaze target of the subject PE (eye to be examined) corresponding to the examination distance.

  In the ophthalmic examination apparatus 1 according to the embodiment, the target control unit 201B is provided with parallax according to each of five types of examination distances (examination distances L1 to L5, 0 <L1 <L2 <L3 <L4 <L5). It is possible to present a pair of visual targets simultaneously to the left and right eyes. The inspection distance L1 corresponds to an inspection distance (for example, 30 cm) when viewing the book J1 placed on the desk while the subject is sitting on a chair. The inspection distance L2 corresponds to an inspection distance (for example, 40 cm) when viewing the keyboard J2 placed on the desk while the subject is sitting on a chair. The inspection distance L3 corresponds to the inspection distance (for example, 50 cm) when viewing the display device J3 placed on the desk while the subject is sitting on the chair. The inspection distance L4 corresponds to the inspection distance (for example, 2 m) when viewing the wall of the living room (the blind is closed) while the subject is sitting on the chair. The inspection distance L5 corresponds to the inspection distance (for example, ∞) when the subject PE ′ standing up from the chair views the scenery outside the room through the window W (with the blind opened). That is, the visual target image corresponding to the examination distance L5 includes a far image viewed from the upper position of each of the left eye to be examined EL and the right eye to be examined ER. When objective measurement is performed, regardless of whether or not the inspection unit (the left-eye inspection unit 120L and the right-eye inspection unit 120R) rotates (including vertical rotation) with respect to the eye to be examined, such as a landscape A gaze target (gaze point) can be set at the approximate center of the target image.

  FIG. 7 shows an example of a pair of visual target images corresponding to the inspection distance L1 according to the embodiment. When L1 is designated as the inspection distance, the target control unit 201B causes the pair of target images PL1 and PR1 to be displayed on the left LCD 11 and the right LCD 11 simultaneously. The pair of target images PL1 and PR1 are a pair of perspective images provided with a parallax corresponding to the inspection distance L1.

  The target control unit 201B controls the left LCD 11 so that the left gaze target TL of the left eye to be examined EL is superimposed on the target image PL1. The target control unit 201B controls the left LCD 11 to present the left gaze target TL in the vicinity of the position corresponding to the examination distance L1 in the target image PL1. At this time, the visual target control unit 201B can control the left LCD 11 to change at least a part of the left gaze target TL (for example, shape, size, orientation, etc.). For example, the target control unit 201B controls the left LCD 11 so that the wing portion of the left gaze target TL moves up and down. This makes it easier for the subject to recognize the position of the left gaze target TL, and makes it easier to fix the left eye E to the left gaze target TL.

  Similarly, the target control unit 201B controls the right LCD 11 so that the right gaze target TR of the right eye ER is superimposed on the target image PR1. The left gaze target TL and the right gaze target TR are presented such that each of the left eye to be examined EL and the right eye to be examined ER gazes at the book J1. The target control unit 201B controls the right LCD 11 to present the right gaze target TR in the vicinity of the position corresponding to the examination distance L1 in the target image PR1. At this time, the visual target control unit 201B can control the right LCD 11 so as to change at least a part of the right gaze target TR (for example, shape, size, orientation, etc.). For example, the target control unit 201B controls the right LCD 11 so that the wing portion of the right gaze target TR moves up and down. This makes it easier for the subject to recognize the position of the right gaze target TR and makes it easier to fix the right eye ER to the right gaze target TR.

  FIG. 8 shows an example of a pair of visual target images corresponding to the inspection distance L2 according to the embodiment. When L2 is designated as the inspection distance, the target control unit 201B displays the pair of target images PL2 and PR2 on the left LCD 11 and the right LCD 11 simultaneously. The pair of visual target images PL2 and PR2 are a pair of perspective images provided with parallax according to the inspection distance L2.

  The target control unit 201B controls the left LCD 11 so that the left gaze target TL of the left eye to be examined EL is superimposed on the target image PL2. The visual target control unit 201B controls the left LCD 11 to present the left gaze target TL in the vicinity of the position corresponding to the examination distance L2 in the visual target image PL2. At this time, the target control unit 201B can control the left LCD 11 so as to change at least a part of the left gaze target TL, as in FIG.

  Similarly, the target control unit 201B controls the right LCD 11 so that the right gaze target TR of the right eye ER is superimposed on the target image PR2. The left gaze target TL and the right gaze target TR are presented so that each of the left eye to be examined EL and the right eye to be examined ER gazes at the keyboard J2. The target control unit 201B controls the right LCD 11 so as to present the right gaze target TR in the vicinity of the position corresponding to the examination distance L2 in the target image PR2. At this time, the visual target control unit 201B can control the right LCD 11 to change at least a part of the form of the right gaze target TR, as in FIG.

  FIG. 9 shows an example of a pair of visual target images corresponding to the inspection distance L3 according to the embodiment. When L3 is designated as the inspection distance, the target control unit 201B causes the pair of target images PL3 and PR3 to be displayed on the left LCD 11 and the right LCD 11 simultaneously. The pair of target images PL3 and PR3 are a pair of perspective images provided with parallax according to the inspection distance L3.

  The target control unit 201B controls the left LCD 11 so that the left gaze target TL of the left eye EL is superimposed on the target image PL3 and presented. The target control unit 201B controls the left LCD 11 to present the left gaze target TL in the vicinity of the position corresponding to the inspection distance L3 in the target image PL3. At this time, the target control unit 201B can control the left LCD 11 so as to change at least a part of the left gaze target TL, as in FIG.

  Similarly, the optotype control unit 201B controls the right LCD 11 so that the right gaze target TR of the right eye ER is superimposed and presented on the optotype image PR3. The left gaze target TL and the right gaze target TR are presented so that each of the left eye to be examined EL and the right eye to be examined ER gazes at the display device J3. The target control unit 201B controls the right LCD 11 so as to present the right gaze target TR in the vicinity of the position corresponding to the examination distance L3 in the target image PR3. At this time, the visual target control unit 201B can control the right LCD 11 to change at least a part of the form of the right gaze target TR, as in FIG.

  FIG. 10 shows an example of a pair of visual target images corresponding to the inspection distance L4 according to the embodiment. When L4 is designated as the inspection distance, the target control unit 201B causes the pair of target images PL4 and PR4 to be displayed on the left LCD 11 and the right LCD 11 simultaneously. The pair of target images PL4 and PR4 are a pair of perspective images provided with parallax according to the inspection distance L4.

  The target control unit 201B controls the left LCD 11 so that the left gaze target TL of the left eye to be examined EL is superimposed on the target image PL4 and presented. The target control unit 201B controls the left LCD 11 so as to present the left gaze target TL in the vicinity of the position corresponding to the examination distance L4 in the target image PL4. At this time, the target control unit 201B can control the left LCD 11 so as to change at least a part of the left gaze target TL, as in FIG.

  Similarly, the optotype control unit 201B controls the right LCD 11 so that the right gaze target TR of the right eye ER is superimposed and presented on the optotype image PR4. The left gaze target TL and the right gaze target TR are presented so that each of the left eye to be examined EL and the right eye to be examined ER gazes at one point of the wall of the living room. The target control unit 201B controls the right LCD 11 so as to present the right gaze target TR near the position corresponding to the examination distance L4 in the target image PR4. At this time, the visual target control unit 201B can control the right LCD 11 to change at least a part of the form of the right gaze target TR, as in FIG.

  FIG. 11 shows an example of a pair of visual target images corresponding to the inspection distance L5 according to the embodiment. When L5 is designated as the inspection distance, the target control unit 201B causes the pair of target images PL5 and PR5 to be displayed on the left LCD 11 and the right LCD 11 simultaneously. The pair of target images PL5 and PR5 are a pair of perspective images provided with a parallax corresponding to the inspection distance L5.

  The target control unit 201B controls the left LCD 11 so that the left gaze target TL of the left eye EL is superimposed on the target image PL5 and presented. The target control unit 201B controls the left LCD 11 to present the left gaze target TL in the vicinity of the position corresponding to the inspection distance L5 in the target image PL5. At this time, the target control unit 201B can control the left LCD 11 so as to change at least a part of the left gaze target TL, as in FIG.

  Similarly, the target control unit 201B controls the right LCD 11 so as to present the right gaze target TR of the right eye ER to be superimposed on the target image PR5. The left gaze target TL and the right gaze target TR are presented so that each of the left eye to be examined EL and the right eye to be examined ER gazes at one point of the scenery outside the window. The target control unit 201B controls the right LCD 11 so as to present the right gaze target TR in the vicinity of the position corresponding to the examination distance L5 in the target image PR5. At this time, the visual target control unit 201B can control the right LCD 11 to change at least a part of the form of the right gaze target TR, as in FIG.

  The target control unit 201 </ b> B displays a pair of target images shown in FIGS. 7 to 11 on the left LCD 11 and the right LCD 11 simultaneously based on the target image data 202 </ b> A stored in the storage unit 202. In this case, each time the inspection distance is changed, the target control unit 201B reads the target image data corresponding to the changed inspection distance from the storage unit 202, and a pair of target images based on the read target image data. The target image is simultaneously displayed on each of the left LCD 11 and the right LCD 11.

  The target control unit 201B may cause the calculation unit 210 (image processing unit 210A) to form a pair of target images corresponding to the changed inspection distance every time the inspection distance is changed. For example, the storage unit 202 stores the three-dimensional data of the visual target object arranged in a predetermined three-dimensional space. The calculation unit 210 sets the position of the left virtual camera corresponding to the left eye to be examined EL and the position of the right virtual camera corresponding to the right eye to be examined ER in a three-dimensional space every time the examination distance is changed. To do. Based on the three-dimensional data stored in the storage unit 202, the arithmetic unit 210 renders a visual target object on a virtual plane arranged at a position corresponding to the inspection distance with the position of the left virtual camera as a viewpoint. Thus, a target image for the left eye to be examined EL is formed. Similarly, based on the three-dimensional data stored in the storage unit 202, the calculation unit 210 uses the position of the right virtual camera as a viewpoint and displays a target object with respect to a virtual plane disposed at a position corresponding to the inspection distance. By rendering, a target image for the right eye ER is formed.

  Further, the target control unit 201B may simultaneously display a pair of target images on which the targets corresponding to at least two types of inspection distances among the inspection distances L1 to L5 are drawn on the left LCD 11 and the right LCD 11 respectively. Good. In this case, on each of the left LCD 11 and the right LCD 11, a perspective image in which the lower side corresponds to the near side and the upper side corresponds to the far side is displayed.

  FIG. 12 illustrates an example of a pair of target images in which targets corresponding to the inspection distances L1 to L5 according to the embodiment are depicted. The target control unit 201B causes the pair of target images PL6 and PR6 to be displayed on the left LCD 11 and the right LCD 11 simultaneously. The pair of target images PL6 and PR6 are a pair of perspective images provided with parallax according to the inspection distances L1 to L5. Each of the visual target images PL6 and PR6 is an image in which visual target images corresponding to the inspection distance L1 to the inspection distance L5 are continuously drawn from the lower side to the upper side. The target images PL6 and PR6 may be images in which target images corresponding to the inspection distance L5 to the inspection distance L5 are depicted stepwise from the bottom to the top.

  The target control unit 201B controls the left LCD 11 so that the left gaze target TL of the left eye to be examined EL is superimposed on the target image PL6 and presented. The target control unit 201B controls the left LCD 11 to present the left gaze target TL in the vicinity of a position corresponding to any of the inspection distances L1 to L5 in the target image PL6. The target control unit 201B can control the left LCD 11 to present the left gaze target TL at a position corresponding to the designated inspection distance. The presentation position of the left gaze target TL in the left perspective image can be changed based on the operation content with respect to the examiner controller 300 or the subject controller 310.

  Further, the image processing unit 210A can perform blurring processing on the left perspective image according to the presentation position of the left gaze target TL in the left perspective image. The target control unit 201B causes the left LCD 11 to display the blurred image. For example, the image processing unit 210A performs blurring processing on a region in which a visual target corresponding to another examination distance that is a predetermined distance away from the presentation position of the left gaze target TL in the left perspective image is drawn. Further, the visual target control unit 201B enlarges only the vicinity of the position of the left gaze target TL (only the image corresponding to the predetermined examination distance including the position of the left gaze target TL) and presents it on the left eye to be examined EL. Also good.

  Similarly, the optotype control unit 201B controls the right LCD 11 so that the right gaze target TR of the right eye ER is superimposed and presented on the optotype image PR6. The target control unit 201B controls the right LCD 11 to present the right gaze target TR in the vicinity of a position corresponding to any of the inspection distances L1 to L5 in the target image PR6. The target control unit 201B can control the right LCD 11 so as to present the right gaze target TR at a position corresponding to the designated inspection distance. The presentation position of the right gaze target TR in the right perspective image can be changed based on the operation contents for the examiner controller 300 or the subject controller 310.

  Further, the image processing unit 210A can perform blurring processing on the right perspective image according to the presentation position of the right gaze target TR in the right perspective image. The target control unit 201B displays the image subjected to the blurring process on the right LCD 11. For example, the image processing unit 210A performs blurring processing on a region in which a visual target corresponding to another examination distance that is a predetermined distance away from the presentation position of the right gaze target TR in the right perspective image is drawn. In addition, the target control unit 201B enlarges only the vicinity of the position of the right gaze target TR (only an image corresponding to a predetermined examination distance including the position of the right gaze target TR) and presents it to the right eye ER. Also good.

  By displaying the target images PL6 and PR6 as shown in FIG. 12 on the left LCD 11 and the right LCD 11, only the left gaze target TL and the right gaze target TR are controlled without switching the target according to the examination distance. Good.

  As described above, the eye to be examined is converged and the target image corresponding to the examination distance is presented to the left and right eyes, so that objective measurement is simultaneously performed on the left and right eyes in a state closer to natural vision. It becomes possible to do.

  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 optotype presenting optical systems 10L and 10R are examples of the “information presenting system” according to the embodiment. The LCD 11 (left LCD 11) of the optotype presenting optical system 10L is an example of the “left display unit” according to the embodiment. The LCD 11 (right LCD 11) of the optotype presenting optical system 10R is an example of the “right display unit” according to the embodiment. The target images PL1 to PL6 are examples of the “left perspective image” according to the embodiment. The visual target images PR1 to PR6 are examples of the “right perspective image” according to the embodiment. The examiner controller 300 or the subject controller 310 is an example of the “operation unit” according to the embodiment. The reflex measurement optical system 40L and the kerato measurement optical system 50L are examples of the “left objective measurement optical system” according to the embodiment. The reflex measurement optical system 40R and the kerato measurement optical system 50R are examples of the “right objective measurement optical system” according to the embodiment. The visual target presentation optical system 10L is an example of a “left visual target presentation optical system” according to the embodiment. The optotype presenting optical system 10R is an example of a “right target presenting optical system” according to the embodiment.

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

  FIG. 13 and FIG. 14 show 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. Details of S3 will be described later.

(S4)
The control device 200 displays the target selected by the examiner or the control device 200 on the LCD 11 by controlling 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.

(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. 14 shows a flowchart of the operation example of S3 in FIG. FIG. 14 illustrates an operation example in the case where the distance objective measurement and the near objective measurement are performed in S3.

(S11)
First, similarly to S1, the control device 200 aligns the optical system of the left-eye inspection unit 120L with respect to the left eye EL using the alignment optical systems 30L and 30R, and the optical of the right-eye inspection unit 120R with respect to the right eye ER. Perform system alignment.

(S12)
Next, the control device 200 performs distance objective measurement by a known method. For example, the control device 200 objectively measures the refractive power in a state where each of the left eye to be examined EL and the right eye to be examined ER is viewed far away. Specifically, the control device 200 performs objective measurement on the left eye EL and right eye ER as temporary measurement, and performs objective measurement in a clouded state based on the result of the temporary measurement.

(S13)
Subsequently, the control device 200 sets an inspection distance. The examination distance may be specified by an operation on the examiner controller 300 or the subject controller 310. The control device 200 may set the inspection distance according to a predetermined measurement sequence.

(S14)
The control device 200 selects a target image corresponding to the examination distance set in S13, and reads out the image data of the selected target image from the target image data 202A stored in the storage unit 202. .

(S15)
Based on the examination distance set in S13, the control device 200 obtains the rotation angle θ as shown in FIG. 5, and the left eye inspection unit 120L and the right eye inspection unit 120R are obtained by the obtained rotation angle θ. Rotate each one. 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.

(S16)
The control device 200 presents the left gaze target TL at a position corresponding to a position away from the left eye to be examined EL by a designated examination distance, and a position corresponding to a position away from the right eye to be examined ER by the above examination distance. The visual target presenting optical systems 10L and 10R are controlled so as to present the right gaze target TR. Further, the control device 200 displays the pair of visual target images selected in S14 on each of the left LCD 11 and the right LCD 11.

(S17)
The control device 200 (target control unit 201B) controls the LCD 11 so that the wing portions of the left gaze target TL and the right gaze target TR move up and down. Thereby, it becomes easy to fix the left eye to be examined EL to the left gaze target TL, and it becomes easy to fix the right eye to be examined ER to the right gaze target TR.

(S18)
Next, the control device 200 performs near-field objective measurement by a known method. For example, in the state where the left eye EL and the right eye ER are fixed to the left gaze target TL and the right gaze target TR, the control device 200 measures the luminous flux for each of the left eye E and the right eye ER. And the return light is received by the photographing optical systems 20L and 20R. The computing unit 210 obtains the objective values of the left eye EL and the right eye ER by analyzing the light reception results of the photographing optical systems 20L and 20R, respectively, using a known method. This is the end of the operation of the ophthalmic examination apparatus 1 (end).

  As described above, in the ophthalmic examination apparatus 1 according to the embodiment, the eye to be examined is converged by rotating the measuring head, and the target image corresponding to the examination distance is simultaneously presented to the left and right eyes. Therefore, objective measurement can be performed for the left and right eye to be examined in a state closer to natural vision. Note that the objective measurement can be performed on the left and right eye without being congested by merely presenting the target image corresponding to the examination distance to the left and right eye simultaneously, in a state closer to natural vision. .

[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 an information presentation system (target presentation optical systems 10L and 10R) and a control unit (the control device 200 or the control unit 201). The information presentation system includes a left display unit (LCD 11 of the target presentation optical system 10L) that displays information (target) presented to the left subject eye (left subject eye EL), and a right subject eye (right subject eye ER). And a right display unit (LCD 11 of the target-presenting optical system 10R) for displaying information to be presented. The control unit presents a left gaze target (left gaze target TL) at an apparent position separated from the left eye by a predetermined distance, and a right gaze target (right gaze) at an apparent position away from the right eye by a predetermined distance. The left and right perspective images (target images PL1 to PL6) and the right perspective images (target images PR1 to PR6) corresponding to the binocular parallax corresponding to a predetermined distance are controlled so as to present the target TR). ) Are displayed on the left display part and the right display part, respectively.

  According to such a configuration, the left perspective image and the right perspective image corresponding to the binocular parallax corresponding to the predetermined distance are displayed on the left display unit and the right display unit, respectively, while being separated from the left and right eyes by a predetermined distance. Since the left gaze target and the right gaze target are presented at the apparent positions, it is possible to simultaneously perform ophthalmic examinations on the left and right eye to be examined in a state closer to natural vision.

  In the ophthalmic examination apparatus according to the embodiment, the control unit may control the information presentation system to move at least one of the left gaze target and the right gaze target in a direction orthogonal to the optical axis of the information presentation system. Good.

  According to such a configuration, since at least one of the left gaze target and the right gaze target can be moved in the left perspective image or the right perspective image, it is possible to fixate at an arbitrary position of the perspective image of the eye to be examined. Is possible.

  Further, the ophthalmic examination apparatus according to the embodiment further includes an operation unit (examiner controller 300 or subject controller 310), and the control unit is operated based on a signal (operation signal) input from the operation unit. The information presentation system may be controlled to move at least one of the gaze target and the right gaze target.

  According to such a configuration, at least one of the left gaze target and the right gaze target can be moved in the left perspective image or the right perspective image by an operation on the operation unit, so that the position of the desired gaze target in the subjective examination Ophthalmic examination can be performed in a state of fixation.

  In the ophthalmic examination apparatus according to the embodiment, the control unit may control the information presentation system so as to change the size of at least one of the left gaze target and the right gaze target according to the apparent position.

  According to such a configuration, the subject can easily distinguish and fix the left gaze target and the right gaze target in the left perspective image and the right perspective image.

  In the ophthalmic examination apparatus according to the embodiment, the control unit may control the information presentation system so as to change at least a part of each of the left gaze target and the right gaze target.

  According to such a configuration, the examiner changes at least a part of the left gaze target and the right gaze target in the left perspective image and the right perspective image. The right gaze target can be identified and fixed more easily.

  The ophthalmic examination apparatus according to the embodiment may include an image processing unit (image processing unit 210A) that performs a blurring process on each of the left perspective image and the right perspective image according to a predetermined distance.

  According to such a configuration, since the blur processing is performed on the left perspective image and the right perspective image, the subject can easily view the perspective image in the perspective direction. Thereby, it becomes possible to fixate the left perspective image and the right perspective image in a state closer to natural vision.

  In the ophthalmic examination apparatus according to the embodiment, each of the left perspective image and the right perspective image includes two or more images according to a predetermined distance, and the control unit displays the image according to the predetermined distance as a left display unit and You may display on a right display part.

  According to such a configuration, any one of two or more pre-formed perspective images may be selected according to a predetermined distance, so that the ophthalmic examination can be performed simultaneously on the left and right eyes in a state closer to natural vision with simple control. It is possible to provide an ophthalmic examination apparatus capable of performing the above.

  In the ophthalmologic apparatus according to the embodiment, each of the left perspective image and the right perspective image may be an image in which the lower side corresponds to the near side and the upper side corresponds to the far side.

  According to such a configuration, the subject's eye can be fixed with a perspective image from the near side to the far side from the lower side to the upper side, so that the subject can see the left and right eye to be examined in a state closer to natural vision. An ophthalmic examination apparatus capable of performing an ophthalmic examination can be provided.

  In the ophthalmic examination apparatus according to the embodiment, each of the left perspective image and the right perspective image may include a far image viewed from the upper position of each of the left eye and the right eye.

  According to such a configuration, the eye to be examined is fixed using the distant images viewed from the upper positions of the left eye and the right eye, so the ophthalmic examination is performed in a state where the eye to be examined is far-sighted. Can be executed easily.

  In addition, the ophthalmic examination apparatus according to the embodiment has a left objective measurement optical system (ref measurement optical system 40L, kerato measurement optical system 50L) for objectively measuring the left subject eye, and an objective for the right subject eye. Right objective measurement optical system (ref measurement optical system 40R, kerato measurement optical system 50R) for measuring automatically.

  According to such a configuration, it is possible to simultaneously perform objective measurement on the left and right eye to be examined in a state closer to natural vision.

  In the ophthalmic examination apparatus according to the embodiment, the information presentation system includes a left target presentation optical system (target target presentation optical system 10L) that presents the target displayed on the left display unit to the left eye, and a right display. A right visual target presenting optical system (visual target presenting optical system 10R) that presents the visual target displayed on the unit to the right eye to be examined.

  According to such a configuration, it is possible to provide an ophthalmologic examination apparatus capable of simultaneously measuring objectives for the left and right eye to be examined in a state closer to natural vision and capable of performing a subjective examination for both eyes.

[Others]
The above-described embodiment is not limited to the configuration of the optical system described in FIG. 3 and the configuration and control contents of the control system described in FIG. 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.

  In the embodiment, an ophthalmic examination apparatus capable of performing subjective examination and objective measurement on both eyes simultaneously has been described. However, the ophthalmic examination apparatus according to the embodiment is not limited to this. For example, the ophthalmic examination apparatus according to the embodiment may be an ophthalmic examination apparatus capable of performing a subjective examination or an objective measurement on only one of the left subject eye and the right subject eye.

  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 11 LCD
20L, 20R Imaging optical system 100 Measuring head 120L Left eye inspection unit 120R Right eye inspection unit 200 Controller 201 Controller 201A Display controller 201B Target controller 210 Calculator 210A Image processor

Claims (11)

An information presentation system including a left display unit that displays information presented to the left eye and a right display unit that displays information presented to the right eye;
The information presentation system is configured to present a left gaze target at an apparent position away from the left eye by a predetermined distance and present a right gaze target at an apparent position away from the right eye by the predetermined distance. A control unit that controls and displays a left perspective image and a right perspective image corresponding to binocular parallax corresponding to the predetermined distance on the left display unit and the right display unit, respectively;
Including ophthalmic examination equipment. The control unit controls the information presentation system to move at least one of the left gaze target and the right gaze target in a direction orthogonal to the optical axis of the information presentation system. The ophthalmic examination apparatus described in 1. Further including an operation unit,
The control unit controls the information presentation system to move at least one of the left gaze target and the right gaze target based on a signal input from the operation unit. The ophthalmic examination apparatus described. The control unit controls the information presentation system so as to change a size of at least one of the left gaze target and the right gaze target according to the apparent position. The ophthalmic examination apparatus according to any one of 3. The said control part controls the said information presentation system so that the form of at least one part of each of the said left gaze target and the said right gaze target may be changed. The any one of Claims 1-4 characterized by the above-mentioned. The ophthalmic examination apparatus described in the item. The ophthalmologic according to any one of claims 1 to 5, further comprising an image processing unit that performs a blurring process on each of the left perspective image and the right perspective image according to the predetermined distance. Inspection device. Each of the left perspective image and the right perspective image includes two or more images according to the predetermined distance,
The said control part displays the image according to the said predetermined distance on the said left display part and the said right display part, respectively. The ophthalmic examination apparatus as described in any one of Claims 1-6 characterized by the above-mentioned. The ophthalmic examination apparatus according to claim 7, wherein each of the left perspective image and the right perspective image is an image in which the lower side corresponds to the near side and the upper side corresponds to the far side. The ophthalmology according to claim 7 or 8, wherein each of the left perspective image and the right perspective image includes a distant image viewed from an upper position of each of the left subject eye and the right subject eye. Inspection device. A left objective measurement optical system for objectively measuring the left subject eye;
A right objective measurement optical system for objectively measuring the right eye;
The ophthalmic examination apparatus according to any one of claims 1 to 9, characterized by comprising: The information presentation system is:
A left target presentation optical system for presenting the target displayed on the left display unit to the left eye;
A right target presentation optical system for presenting the target displayed on the right display unit to the right eye to be examined;
The ophthalmic examination apparatus according to any one of claims 1 to 10, wherein the ophthalmic examination apparatus includes:

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