Ophthalmologic apparatus

Abstract

To provide an ophthalmologic apparatus capable of supporting the face of a subject more stably, and acquiring information on an eye to be examined more appropriately and more efficiently.SOLUTION: An ophthalmologic apparatus 100 includes a pair of right and left measuring heads 16 having a measurement optical system 21 for acquiring information on an eye to be examined, a head support part 13 for supporting the pair of measuring heads 16 by hanging them individually, and a chin support part 18 hung from the head support part 13 for supporting the chin of a subject. The chin support part 18 includes a chin support rod 181 extending downward from the head support part 13, a chin butting part 182 extending in the direction of the subject from the chin support rod 181 and butting the chin of the subject, and a vertical position adjusting mechanism 183 for adjusting the position in a vertical direction of the chin support part 18.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to ophthalmic devices. [Background technology]

[0002] There is known an ophthalmic device that includes a measurement head having a measurement optical system for acquiring information about the subject's eye and a visual target presenting unit that presents a visual target to the subject's eye, and that is suspended in front of the subject's eye by a support unit (see, for example, Patent Documents 1 and 2). There is also known an ophthalmic device in which a refractor head having an examination lens is suspended by a support unit and disposed in front of the subject's eye, and that presents a visual target to the subject's eye to acquire information about the subject's eye (see, for example, Patent Document 3).

[0003] The ophthalmic devices described in Patent Documents 1 to 3 have a forehead rest on which the subject places his / her forehead, and support the subject's face so that it does not move unexpectedly while information about the subject's eye is being acquired. Furthermore, the ophthalmic device described in Patent Document 2 has a cheek rest with two cheek rests that support the subject's cheeks, and the subject's face is supported by the cheek rest and the forehead rest, thereby further improving the stability of the support of the face. By supporting the subject's face in this way, information about the subject's eye can be acquired appropriately and quickly, so there is a strong demand for the development of a technology that can support the subject's face more stably. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2019-216817 A [Patent Document 2] Patent Publication No. 2022-064300 [Patent Document 3] JP 2023-048902 A Summary of the Invention [Problem to be solved by the invention]

[0005] The present disclosure has been made in consideration of the above-mentioned circumstances, and aims to provide an ophthalmic device that can more stably support the subject's face and obtain information about the subject's eye more appropriately and efficiently. [Means for solving the problem]

[0006] In order to achieve the above-mentioned objective, the ophthalmic device disclosed herein comprises a measurement head having a measurement optical system for acquiring information about the subject's eye, a head support section that suspends and supports the measurement head, and a chin support section that is suspended from the head support section and supports the subject's chin. Effect of the Invention

[0007] An ophthalmologic apparatus configured in this manner can support the face of the subject more stably, and can obtain information about the subject's eye more appropriately and efficiently. [Brief description of the drawings]

[0008] [Figure 1] 1 is a perspective view showing an overall configuration of an ophthalmic apparatus according to a first embodiment. [Diagram 2] 1 is a diagram showing a schematic configuration of a main part of an ophthalmic apparatus according to a first embodiment. [Diagram 3] 2 is a side view of a forehead rest and a chin support of the ophthalmologic apparatus according to the first embodiment. FIG. [Figure 4] 2 is a perspective view of a forehead rest and a chin support of the ophthalmic apparatus according to the first embodiment. FIG. [Diagram 5] 11 is a side view of a forehead rest and a chin support of an ophthalmic apparatus according to a second embodiment. FIG. [Figure 6] FIG. 11 is a perspective view of a forehead rest and a chin support of an ophthalmic apparatus according to a second embodiment. [Figure 7] 13 is a side view of a forehead rest and a chin support of an ophthalmic apparatus according to Example 3. FIG. [Figure 8] FIG. 11 is a perspective view of a forehead rest and a chin support of an ophthalmic apparatus according to a third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Example 1 An ophthalmic device 100 according to a first embodiment of the present disclosure will be described below with reference to Figs. 1 to 4. The ophthalmic device 100 according to the first embodiment is a binocular open-type ophthalmic device capable of acquiring information on both of a subject's eyes E (hereinafter referred to as "eye information") simultaneously with the subject P keeping both eyes E open (see Fig. 3, etc.). The ophthalmic device 100 of the first embodiment is also capable of acquiring eye information for each eye by blocking one eye or turning off the fixation target.

[0010] The ophthalmic device 100 of the first embodiment is a device capable of performing any objective test and subjective test. In the subjective test, the ophthalmic device 100 presents a visual target or the like to the subject P at a predetermined presentation position, and obtains a subjective test result as eye information based on the subject P's response to the visual target or the like. The subjective test includes subjective refraction measurements such as a distance test, a medium vision test, a near vision test, a contrast test, a night test, a glare test, a pinhole test, and a stereoscopic vision test, and a visual field test. In the objective test, the ophthalmic device 100 irradiates light to the subject's eye E and measures eye information based on the detection result of the return light. The objective test includes a measurement for obtaining characteristics of the subject's eye E as eye information, and a photograph for obtaining an image of the subject's eye E. Furthermore, objective examinations include objective refraction measurement (REF measurement), corneal shape measurement (KERATOM measurement), intraocular pressure measurement, fundus photography, tomography using optical coherence tomography (OCT photography), and measurements using OCT.

[0011] [Overall configuration of ophthalmic equipment] The ophthalmologic apparatus 100 of the first embodiment mainly includes a main body 10 and an examiner controller 27, but may also include a subject controller (not shown) etc. As shown in Fig. 1, the main body 10 includes a base 11, an eye examination table 12, a head support 13, a drive mechanism 15, a pair of measurement heads 16 (16L, 16R), a forehead rest 17, a chin support 18, and a control unit 26.

[0012] The pair of measurement heads 16 are suspended and supported by the head support portion 13. The forehead rest portion 17 and the chin support portion 18 are suspended and supported by the head support portion 13, arranged side by side in the front and rear between the pair of measurement heads 16.

[0013] The ophthalmologic apparatus 100 of the first embodiment acquires information on the subject's eye E while the subject faces the optometry table 12 and has his / her forehead supported by a forehead rest 17 suspended between a pair of measurement heads 16 and his / her chin supported by a chin support 18 suspended between the pair of measurement heads 16. In this specification, the X-axis, Y-axis, and Z-axis are set as shown in FIG. 1, and the left-right direction as viewed from the subject P is the X-direction, the up-down direction (vertical direction) is the Y-direction, and the direction perpendicular to the X-direction and the Y-direction, approaching and receding from the subject P (the depth direction of the measurement head 16, i.e., the front-rear direction) is the Z-direction. In the Z-direction, the direction toward the subject P is the forward direction, and the direction away from the subject P is the backward direction.

[0014] The base 11 is placed on the floor surface 1. The optometry table 12 is a desk on which the examiner controller 27 and the subject controller (not shown), items used in the optometry examination, and the subject P places his / her hands for support, and is supported by the base 11. The optometry table 12 may be supported by the base 11 so that its position in the Y direction (height position) is adjustable.

[0015] 1 and 2, the head support part 13 includes a support column 131, an arm part 132, and an attachment base part 133. The support column 131 is supported by the base 11 at the rear end part of the optometry table 12 so as to extend in the Y direction.

[0016] The arm 132 is provided at the tip of the support 131. The arm 132 suspends both measurement heads 16 via the drive mechanism 15 above the optometry table 12, extends from the support 131 toward the front (in the Z direction), and has a mounting base 133 at its end. The arm 132 is movable in the Y direction relative to the support 131. The arm 132 may be movable in the X direction and the Z direction relative to the support 131. A pair of drive mechanisms 15 are suspended from the mounting base 133 at the tip of the arm 132, and each drive mechanism 15 has a measurement head 16 suspended therefrom. That is, the pair of measurement heads 16 are supported by the head support 13 via the pair of drive mechanisms 15.

[0017] A pair of measurement heads 16 are provided to correspond to the left and right eyes E of the subject, respectively, and will be referred to as a left eye measurement head 16L and a right eye measurement head 16R when described individually below. The left eye measurement head 16L acquires information of the left eye E (EL) of the subject P, and the right eye measurement head 16R acquires information of the right eye E (ER) of the subject P. The left eye measurement head 16L and the right eye measurement head 16R are configured to be plane-symmetrical with respect to a vertical plane located midway between them in the X direction.

[0018] 1 and 2, each measurement head 16 is provided with a mirror 19 (referred to as a left eye mirror 19L and a right eye mirror 19R when described individually) which is a deflection member, and houses a measurement optical system 21 (referred to as a left eye measurement optical system 21L and a right eye measurement optical system 21R when described individually). Each measurement head 16 acquires information of the corresponding subject eye E by the measurement optical system 21 via the mirror 19.

[0019] Each measurement optical system 21 has an optical system configured using various optical elements (for example, a Z alignment system, an XY alignment system, a keratometry system, a target projection system (target presentation unit), an anterior eye observation system having an image acquisition unit, a reflex measurement projection system, and a reflex measurement light receiving system, etc.). The measurement optical system 21 can use, for example, the measurement optical system described in JP 2019-216817 A, but is not limited to this configuration.

[0020] Each measurement optical system 21 is composed of one or a combination of a vision testing device that performs a vision test by switching the visual target presented, a phoropter that obtains the appropriate corrective refractive power of the test eye E by switching and positioning corrective lenses, a refractometer and wavefront sensor that measure refractive power, a fundus camera that takes images of the fundus, a tomography device that takes tomographic images of the retina, a specular microscope that takes images of the corneal endothelium, a keratometer that measures the corneal shape, a tonometer that measures intraocular pressure, etc.

[0021] The drive mechanism 15 has a left eye drive mechanism 15L corresponding to the left eye measurement head 16L, and a right eye drive mechanism 15R corresponding to the right eye measurement head 16R. As shown in Fig. 2, the left eye drive mechanism 15L has a left eye vertical drive unit 22L, a left eye horizontal drive unit 23L, a left eye X-direction rotation drive unit (left eye horizontal direction rotation drive unit) 24L, and a left eye Y-direction rotation drive unit (left eye vertical direction rotation drive unit) 25L. As shown in Fig. 2, the right eye drive mechanism 15R has a right eye vertical drive unit 22R, a right eye horizontal drive unit 23R, a right eye X-direction rotation drive unit (right eye horizontal direction rotation drive unit) 24R, and a right eye Y-direction rotation drive unit (right eye vertical direction rotation drive unit) 25R.

[0022] The configuration of each of the driving units 22L to 25L corresponding to the left-eye measurement head 16L and the configuration of each of the driving units 22R to 25R corresponding to the right-eye measurement head 16R are configured to be plane-symmetrical with respect to a vertical plane located midway between them in the X direction. Hereinafter, except when they are described individually, they may be simply referred to as the vertical driving unit 22, the horizontal driving unit 23, the X-direction rotation driving unit 24, and the Y-direction rotation driving unit 25. The same applies to other components provided symmetrically on the left and right.

[0023] The drive mechanism 15 is configured such that a vertical drive section 22, a horizontal drive section 23, an X-direction rotation drive section 24, and a Y-direction rotation drive section 25 are arranged in this order from the top.

[0024] The vertical drive unit 22 is fixed to a mounting base unit 133 at the tip of the arm unit 132, and moves the horizontal drive unit 23, the X-direction rotation drive unit 24, and the Y-direction rotation drive unit 25 in the Y direction (vertical direction) relative to the arm unit 132 based on a control signal from the control unit 26. The horizontal drive unit 23 is fixed to the vertical drive unit 22, and moves the X-direction rotation drive unit 24 and the Y-direction rotation drive unit 25 in the X direction and Z direction (horizontal direction) relative to the vertical drive unit 22 based on a control signal from the control unit 26.

[0025] The vertical drive unit 22 and the horizontal drive unit 23 are configured by providing an actuator that generates a drive force, such as a pulse motor, and a transmission mechanism that transmits the drive force, such as a combination of gears, rack and pinion, etc. The horizontal drive unit 23 can be easily configured and the control of horizontal movement can be easily performed by providing a combination of an actuator and a transmission mechanism separately for the X direction and the Z direction, for example.

[0026] The X-direction rotation drive unit 24 is connected to the horizontal drive unit 23. Based on a control signal from the control unit 26, the X-direction rotation drive unit 24 rotates the measurement head 16 and the Y-direction rotation drive unit 25 corresponding to the horizontal drive unit 23 in the X direction (horizontal direction) around a pair of left and right vertical eyeball rotation axes that pass through the eyeball rotation center of the corresponding subject eye E and extend in the vertical direction (Y direction) as centers (rotation axes).

[0027] The Y-direction rotation drive unit 25 is connected to the X-direction rotation drive unit 24. The measurement head 16 is suspended from this Y-direction rotation drive unit 25. Based on a control signal from the control unit 26, the Y-direction rotation drive unit 25 rotates the corresponding measurement head 16 relative to the X-direction rotation drive unit 24 in the Y direction (vertical direction, up-down direction) around a pair of left and right horizontal eyeball rotation axes that pass through the eyeball rotation point of the corresponding subject eye E and extend in the horizontal direction (X direction) as centers (rotation axes).

[0028] The X-direction rotation drive unit 24 and the Y-direction rotation drive unit 25 can be configured such that a transmission mechanism receiving a driving force from an actuator moves along an arc-shaped guide groove. By matching the center positions of the guide grooves with a pair of horizontal eyeball rotation axes and a pair of vertical eyeball rotation axes, respectively, the X-direction rotation drive unit 24 and the Y-direction rotation drive unit 25 can rotate the measurement head 16 around the pair of horizontal eyeball rotation axes and a pair of vertical eyeball rotation axes of the subject's eye E.

[0029] The X-direction rotation drive unit 24 can be configured to support the Y-direction rotation drive unit 25 and the measuring head 16 rotatably about a rotation axis provided therein, and to rotate the measuring head 16 while changing the supporting position in cooperation with the horizontal drive unit 23. The Y-direction rotation drive unit 25 can be configured to support the measuring head 16 rotatably about a rotation axis provided therein, and to rotate the measuring head 16 while changing the supporting position in cooperation with the vertical drive unit 22.

[0030] With the above configuration, the drive mechanism 15 can move each measurement head 16 individually or in conjunction with each other in the X, Y and Z directions, and rotate the measurement heads 16 in the X and Y directions around the vertical and horizontal eyeball rotation axes of the subject's eye E. In the ophthalmic apparatus 100 of the first embodiment, the control unit 26 drives and controls each of the drive units 22 to 25 of the drive mechanism 15 to move and rotate each measurement head 16. Furthermore, an examiner can manually drive each of the drive units 22 to 25 to move and rotate each measurement head 16.

[0031] In addition, the left eye X-direction rotation drive unit 24L and the right eye X-direction rotation drive unit 24R rotate the left eye measurement head 16L and the right eye measurement head 16R in the X direction (left and right direction) to diverge (divergence movement) or converge (convergence movement) the test eye E. In addition, the left eye Y-direction rotation drive unit 25L and the right eye Y-direction rotation drive unit 25R rotate the left eye measurement head 16L and the right eye measurement head 16R in the Y direction (up and down direction) to direct the line of sight of the test eye E downward or return it to its original position. In this way, in the ophthalmologic device 100, the test subject can perform a divergence movement and convergence movement test, and can perform tests at various test distances from a far-point distance test to a near-point distance test in a binocular vision state to measure eye information of both test eyes E.

[0032] The forehead rest 17 is a member that the forehead H of the subject P rests against, and is a member for supporting the face of the subject P so that the direction and position of the face do not move. The forehead rest 17 is suspended between the pair of measurement heads 16 from the mounting base 133. As shown in Figs. 1 and 2, the forehead rest 17 includes a forehead support bar 171 and a forehead rest main body 172. The forehead support bar 171 is a rod-shaped member that is attached so as to extend downward and forward from the mounting base 133. The forehead rest main body 172 is attached to the lower end of the forehead support bar 171, on the upper side of the pair of measurement heads 16. The forehead rest main body 172 is formed in a horizontally elongated elliptical shape having a curved surface so as to fit the forehead H of the subject P. The vertical position adjustment of the forehead rest 17 is performed by moving the arm 132 in the Y direction relative to the support 131.

[0033] The chin support 18 is a member against which the chin C of the subject P is placed, and is a member for supporting the face so as to prevent the direction and position of the face of the subject P from moving. The ophthalmic apparatus 100 of the first embodiment supports the face of the subject P with the chin support 18 in addition to the forehead rest 17, thereby further improving the stability of the face of the subject P.

[0034] The chin support section 18 mainly includes a chin support bar 181, a chin rest 182, and a vertical position adjustment mechanism 183. Details of each part of the chin support section 18 will be described below with reference to Figs. 2 to 4. The chin support bar 181 is a rod-shaped member disposed behind the forehead support bar 171 and attached so as to extend vertically downward from the attachment base 133. A threaded portion 181a is provided on the outer periphery of the lower end of the chin support bar 181, and a rotation prevention groove 181b extending in the vertical direction is provided above the threaded portion 181a. The threaded portion 181a and the rotation prevention groove 181b also function as part of the vertical position adjustment mechanism 183. The vertical position adjustment mechanism 183 is attached to the lower end of the chin support bar 181, below the pair of measurement heads 16, and the chin rest 182 is attached to the other end of the vertical position adjustment mechanism 183, on the subject P side.

[0035] The chin rest 182 is a member that comes into contact with the front of the chin C of the subject P. The chin rest 182 is formed of a horizontally long plate-like member having a curved surface that is recessed backward so as to fit the front of the chin C.

[0036] The vertical position adjustment mechanism 183 is a member that adjusts the vertical position, i.e., the height, of the chin rest 182. The position of the entire chin support 18 can be adjusted by moving the arm 132 in the Y direction relative to the support 131. However, the distance between the forehead H and chin C of the subject P varies from person to person. Therefore, the chin support 18 of Example 1 is configured so that the vertical position (height) of the chin rest 182 can be adjusted relative to the mounting base 133 by the vertical position adjustment mechanism 183.

[0037] The vertical position adjustment mechanism 183 mainly includes a cubic main body 183a, a mounting bracket 183b, and a height adjustment screw 183c. The mounting bracket 183b is a U-shaped bracket (C-shaped bracket) with both sides bent at right angles, and the lower part of the chin support bar 181 is inserted into an insertion hole 183d provided in the center. A protrusion 183e that engages with the rotation prevention groove 181b of the chin support bar 181 is provided in the insertion hole 183d. By engaging the rotation prevention groove 181b with the protrusion 183e, the mounting bracket 183b is attached to the chin support bar 181 so that it can move up and down but cannot rotate around the chin support bar 181. One end of the main body 183a is connected and fixed to the lower ends of both arms protruding in the U-shape of the mounting bracket 183b by a screw member 186. The height adjustment screw 183c is made of an SL screw rotation knurl or the like. The height adjustment screw 183c is attached to the inner surface of the mounting bracket 183b so as to be rotatable relative to the mounting bracket 183b but not separate from it. More specifically, the height adjustment screw 183c has an engagement sleeve (not shown) cut into the upper surface so that the mounting bracket 183b does not float up. The height adjustment screw 183c may be provided with an E-ring or the like instead of the engagement sleeve. The height adjustment screw 183c is screwed to the outer periphery of the threaded portion 181a of the chin support bar 181 so as to be rotatable up and down. The chin rest portion 182 is rotatably connected to the other end (subject P side) of the main body portion 183a via a pivot portion 185.

[0038] In the chin support 18 equipped with the vertical position adjustment mechanism 183 configured as described above, the examiner rotates the height adjustment screw 183c to move it up and down along the screw portion 181a. By this operation, the mounting bracket 183b, the main body portion 183a, and the chin rest 182 are moved up and down together with the height adjustment screw 183c, and the position of the chin rest 182 in the vertical direction is adjusted.

[0039] The vertical position adjustment mechanism 183 is not limited to the above configuration. For example, as a modified example, the chin support bar 181 is not provided with the screw portion 181a or the anti-rotation groove 181b, and the vertical position adjustment mechanism 183 is not provided with the height adjustment screw 183c screwed into the screw portion 181a. Instead of the configuration of the first embodiment, the screw member 186 may be configured with a screw member such as a thumb screw, and the main body portion 183a may be configured to be rotatably connected to the lower end of the chin support bar 181 by this screw member. In this configuration, the examiner can adjust the height of the chin rest portion 182 by rotating the main body portion 183a at an appropriate rotation angle around the screw member as a rotation axis (rotation axis 184 shown by a dashed line in FIG. 4) according to the position of the chin C of the subject P with the screw member loosened.

[0040] This rotation axis 184 is an axis extending in the X direction (left-right direction). The main body 183a rotates around the X axis with respect to the chin support bar 181, centering on this rotation axis 184 extending in the X direction. This rotation causes the main body 183a (vertical position adjustment mechanism 183) to rotate up and down together with the chin rest 182 connected to the other end, changing the vertical position of the chin rest 182. When the chin rest 182 is at an appropriate position (height), the examiner tightens the screw member to fix the position of the main body 183a, thereby restricting its rotation. This makes it possible to prevent the chin rest 182 from moving up and down unexpectedly while eye information is being acquired.

[0041] As yet another modified example, a screw member that controls the rotation of main body portion 183a depending on the amount and direction of rotation can be used instead of screw member 186. More specifically, when the screw member is rotated clockwise, main body portion 183a and chin rest portion 182 rotate upward in accordance with the amount of rotation, and when the screw member is rotated counterclockwise, main body portion 183a and chin rest portion 182 rotate downward in accordance with the amount of rotation.

[0042] In addition, the chin rest 182 can rotate (swing) around the X-axis (up and down direction) with respect to the vertical position adjustment mechanism 183, with the pivot support 185 as the rotation axis. Therefore, even after the height adjustment with the height adjustment screw 183c is completed, the subject P can rotate the chin rest 182 via the pivot support 185 by moving his / her face, etc., to fine-tune the vertical position of the chin rest 182 and the direction of contact with the chin C. In addition, even if the chin C moves up and down due to the movement of the mouth when the subject P answers about the vision, the chin rest 182 swings up and down following the movement of the chin C due to the action of the pivot support 185, and contact with the chin C is maintained. Therefore, the chin rest 182 can maintain stable support of the chin C.

[0043] As described above, the chin support part 18 and the forehead rest part 17 are suspended from the mounting base part 133 separately from the measuring head 16. With this configuration, even if the measuring head 16 moves in the vertical direction, the vertical positions of the forehead rest part 17 and the chin support part 18 are not affected. Furthermore, the vertical position of the chin support part 18 can be freely adjusted according to the position of the chin C by the vertical position adjustment mechanism 183, separately from the measuring head 16.

[0044] The examiner's controller 27 is an information processing device that accepts input operations by the examiner (e.g., input of a subject ID, examination items, parameters, instructions, etc.) and outputs a control signal to the control unit 26. The examiner's controller 27 is composed of, for example, a tablet terminal or a smartphone equipped with a control unit (CPU), a monitor, an input unit, a microphone, a speaker, etc. The examiner's controller 27 may be a notebook personal computer, a desktop personal computer, etc., or a dedicated controller provided in the ophthalmic apparatus 100. The examiner's controller 27 communicates with the control unit 26 via communication means such as short-distance wireless or the Internet.

[0045] The subject controller that may be provided in the ophthalmologic apparatus 100 is a device used by the subject P to respond when acquiring information on the subject's eye E. The subject controller includes, for example, a keyboard, a mouse, a joystick, a touch pad, a touch panel, etc. The subject controller is connected to the control unit 26 via a wired or wireless communication path, and outputs a control signal to the control unit 26 in response to a response operation input to the subject controller.

[0046] The control unit 26 is provided on the base 11 of the main body 10, and controls each unit of the ophthalmic apparatus 100. The control unit 26 is connected to the measurement optical system 21, the drive mechanism 15, the examiner's controller 27, the subject's controller, etc., and controls them in an integrated manner.

[0047] The control unit 26 is composed of a processor such as a CPU. The control unit 26 loads a program stored in a memory such as a storage unit connected to the control unit 26 or an internal memory such as a ROM onto, for example, a RAM, thereby comprehensively controlling the operation of the ophthalmic apparatus 100 in response to operations on the examiner's controller 27 and the subject's controller.

[0048] The control unit 26 acquires eye information according to the test items, parameters, instructions, etc. input from the examiner's controller 27. The test items include the objective test and the subjective test listed above. The parameters are information necessary for the test, such as the visual acuity value, the initial value of the correction power, the optotype to be presented, the test distance, etc.

[0049] The actions of the examiner and the subject P when acquiring eye information using the ophthalmic apparatus 100 of the first embodiment configured as described above will be described as follows. The ophthalmic apparatus 100 is powered on and started up, and the control unit 26 is capable of communicating with the examiner's controller 27 and the subject's controller.

[0050] During the examination, the subject P sits on a chair or the like and faces the ophthalmologic apparatus 100. Next, the subject P places his / her forehead on the forehead rest body 172 of the forehead rest 17. Next, the examiner rotates the height adjustment screw 183c of the vertical position adjustment mechanism 183 to move the chin rest 182 connected to the vertical position adjustment mechanism 183 up and down along the threaded portion 181a of the chin support rod 181. Through this operation, the chin rest 182 is positioned so that the chin rest 182 comes into contact with the chin C of the subject P.

[0051] Through the above operations, the chin rest 182 comes into proper contact with the chin C of the subject P, and the chin C is supported. Therefore, the face of the subject P is properly fixed by the forehead rest 17 and the chin support 18. When the fixation of the face of the subject P is completed, the examiner operates the examiner controller 27 to cause the main body 10 to perform an operation for acquiring eye information. The ophthalmic device 100 of the first embodiment first performs alignment. At this time, the driving mechanism 15 moves the measurement head 16 in the up / down / left / right directions and rotates according to the position of the subject's eye E, but the chin support 18 does not move up / down or rotate together with the measurement head 16, and stable support of the chin C is maintained.

[0052] Then, when the alignment is completed, the ophthalmologic apparatus 100 performs the above-mentioned objective test and subjective test of the subject's eye E, either automatically or at the command of the examiner. Even during these tests, the chin support 18 appropriately prevents unexpected facial movement. Therefore, even if the subject P verbally responds to the vision during the subjective test as well as the objective test, the face does not move unexpectedly, and the need to repeat the test can be prevented. Therefore, each test can be performed more appropriately and efficiently.

[0053] Example 2 An ophthalmic device 100 according to a second embodiment of the present disclosure will be described below with reference to Figs. 5 to 6. The ophthalmic device 100 according to the second embodiment has the same basic configuration as the ophthalmic device 100 according to the first embodiment shown in Fig. 1 and the like, except that the ophthalmic device 100 according to the second embodiment has a chin support unit 18A shown in Figs. 5 to 6 instead of the chin support unit 18. Therefore, the same components as those in the first embodiment are given the same reference numerals as those in the first embodiment, and detailed descriptions are omitted. The following mainly describes the configuration of the chin support unit 18A of the second embodiment.

[0054] 5-6, the chin support part 18A of the second embodiment mainly includes a chin support bar 181, a chin rest part 182A, and a vertical position adjustment mechanism 183A. The chin support bar 181 is attached so as to extend vertically downward from the attachment base part 133. One end of the vertical position adjustment mechanism 183A is attached to the lower end of the chin support bar 181, and the chin rest part 182A is attached to the other end of the vertical position adjustment mechanism 183A on the subject P side.

[0055] The chin support part 18 of the first embodiment includes a chin rest part 182 that abuts against the front surface of the chin C, while the chin support part 18A of the second embodiment includes a chin rest part 182A on which the chin C is placed. This chin rest part 182A is formed of a horizontally long plate-like member having a curved surface that is concave downward so as to fit the lower surface (contour) of the chin C.

[0056] As in the first embodiment, the vertical position adjustment mechanism 183A has a height adjustment screw 183c together with a mounting bracket 183b screwed onto the outer periphery of a threaded portion 181a of the chin support bar 181. One end of the main body 183a is connected to the lower ends of both arms of the mounting bracket 183b via a screw member 186, and the chin rest 182A is rotatably connected to the other end of the main body 183a via a pivot portion 185.

[0057] The height adjustment screw 183c moves up and down by rotation with respect to the chin support bar 181. Due to this movement, the main body 183a (vertical position adjustment mechanism 183A) moves up and down together with the chin rest 182A connected to the other end, the vertical position of the chin rest 182A is changed, and the chin rest 182A is disposed at a position (height) according to the position of the chin C.

[0058] In the second embodiment, the chin support portion 18A may also include a mechanism for adjusting the vertical position of the chin rest portion 182A by rotating about a rotation shaft 184, as in the modified example of the first embodiment.

[0059] Also, the chin rest 182A can rotate (swing) with respect to the vertical position adjustment mechanism 183A with the pivot support 185 as a rotation axis. Therefore, even in the second embodiment, even after the height adjustment with the height adjustment screw 183c is completed, the subject P can rotate the chin rest 182 via the pivot support 185 by moving his / her face, etc., to finely adjust the vertical position of the chin rest 182A and the direction of the chin rest 182A against the chin C. Note that the vertical position adjustment mechanism 183A can be provided with a stopper that restricts the downward rotation angle of the chin rest 182A to an appropriate angle (for example, an angle at which the surface of the chin rest 182A becomes horizontal). This stopper prevents the chin rest 182A from rotating excessively due to the load of the chin C.

[0060] The chin rest 182A can also be configured to be biased upward by a biasing member such as a compression spring. With this configuration, when the subject P places his / her chin C on the chin rest 182A, the chin rest 182A moves downward against the biasing force of the biasing member. At this time, the biasing force of the biasing member acts on the chin rest 182A, so that the chin rest 182A moves downward while contacting the chin C, and is positioned according to the position of the chin C. Therefore, the chin rest 182A can appropriately support the chin C. Furthermore, even if the chin C moves up and down due to the movement of the mouth when the subject P answers about the appearance, the chin rest 182A rotates up and down following the movement of the chin C due to the action of the pivot support 185 and the biasing member. This allows the chin rest 182A to maintain stable support of the chin C.

[0061] Moreover, the chin rest 182A may be provided with a buffer member such as a suspension or a damper instead of or together with the biasing member. Such a buffer member also absorbs the up and down movement of the chin C caused by the movement of the mouth, and the chin rest 182A can maintain stable support of the chin C. The biasing member and buffer member as described above can also be provided in the chin rest 182 of the first embodiment and the chin rest 182B of the third embodiment described below, and the same effect as that of the chin rest 182A of the second embodiment can be obtained.

[0062] The subject P facing the ophthalmic apparatus 100 of the second embodiment configured as described above places his / her forehead on the forehead rest body 172 of the forehead rest 17. Next, the examiner rotates the height adjustment screw 183c of the vertical position adjustment mechanism 183 to move it up and down along the screw portion 181a of the chin support bar 181. This moves the vertical position adjustment mechanism 183A up and down together with the chin rest 182A. This operation positions the chin rest 182A so that the chin C of the subject P rests on the chin rest 182A. This supports the chin C of the subject P by the chin rest 182A. Therefore, in the ophthalmic apparatus 100 of the second embodiment as well, the face of the subject P is stably fixed by the forehead rest 17 and the chin support 18A, and objective and subjective examinations are performed more appropriately and efficiently.

[0063] Example 3 An ophthalmic device 100 according to a third embodiment of the present disclosure will be described below with reference to Figs. 7 and 8. The ophthalmic device 100 according to the third embodiment has the same basic configuration as the ophthalmic device 100 according to the first embodiment shown in Fig. 1 and the like, except that the ophthalmic device 100 according to the third embodiment has a chin support unit 18B shown in Figs. 7 and 8 instead of the chin support unit 18. For this reason, the same components as those in the first embodiment are given the same reference numerals as those in the first embodiment, and detailed descriptions are omitted. In the following, the configuration of the chin support unit 18B of the third embodiment and the like will be mainly described.

[0064] The chin support part 18B of the third embodiment mainly includes a chin support bar 181, a chin rest part 182B, a vertical position adjustment mechanism 183B, and a front-rear position adjustment mechanism 187. The chin support bar 181 is attached so as to extend vertically downward from the attachment base part 133. The vertical position adjustment mechanism 183 is attached to the outer periphery of the chin support bar 181, and the front-rear position adjustment mechanism 187 is attached to the lower end of the vertical position adjustment mechanism 183, below the pair of measuring heads 16, so as to protrude in the direction of the subject P (front direction). The chin rest part 182B is attached to one end (front end) of the front-rear position adjustment mechanism 187.

[0065] The chin rest 182B of the third embodiment is formed of a horizontally long plate-like member having a curved surface recessed toward the rear so as to fit the front of the chin C.

[0066] The vertical position adjustment mechanism 183B has a cylindrical portion 188 arranged on the outer periphery of the chin support bar 181 so as to be movable up and down. The cylindrical portion 188 has grooves 188a extending in the Y direction on both left and right side surfaces. A pair of upper and lower screw members 186 are inserted into each groove 188a. Each screw member 186 is screwed into a screw hole (not shown) provided on the outer periphery of the chin support bar 181. By tightening the screw member 186, the cylindrical portion 188 is fixed to the chin support bar 181 so as not to be movable up and down. By loosening the screw member 186, the cylindrical portion 188 becomes movable up and down relative to the chin support bar 181, and as a result, the vertical length of the entire chin support part 18B expands and contracts. Therefore, when cylindrical portion 188 moves, front-to-back position adjustment mechanism 187 and chin rest portion 182B (the portion surrounded by a dashed line in FIG. 7) connected to cylindrical portion 188 also move up and down, so that the height of chin rest portion 182B can be adjusted as desired.

[0067] Front-rear position adjustment mechanism 187 is formed of a linear member extending in the Z direction, is biased forward by a biasing member (not shown) such as a built-in spring member, and is configured to be freely expandable and contractible in the Z direction relative to chin support bar 181. Chin rest 182B is connected to the front end of front-rear position adjustment mechanism 187. With this configuration, the position of chin rest 182B (front-rear position) can be freely adjusted in the Z direction relative to chin support bar 181.

[0068] The subject P facing the ophthalmic device 100 of the third embodiment configured as above places his / her forehead on the forehead rest body 172 of the forehead rest 17. Next, the examiner rotates the screw member 186 in a loosening direction, and moves the cylindrical portion 188 up and down to adjust the height of the chin rest 182B. Next, the subject P places his / her chin on the chin rest 182B by pushing the chin rest 182B backward. As a result, the biasing means contracts, and the chin rest 182B moves backward, allowing the subject P to place his / her chin on the chin rest 182B in a comfortable position. Therefore, in the ophthalmic device 100 of the second embodiment as well, the face of the subject P is stably fixed by the forehead rest 17 and the chin support portion 18B, and objective and subjective examinations are performed more appropriately and more efficiently.

[0069] As described above, the ophthalmic device 100 of Example 1 comprises a measurement head 16 having a measurement optical system 21 for acquiring information of the subject's eye E, a head support unit 13 that suspends and supports the measurement head 16, and chin supports 18, 18A, 18B that are suspended from the head support unit 13 and support the subject's chin C.

[0070] With this configuration, the face of the subject P is stably fixed by the chin support parts 18, 18A, and 18B, and the face is prevented from moving unexpectedly. Therefore, the ophthalmic device 100 of each of the above-mentioned embodiments can support the face of the subject P more stably, and can acquire information of the subject's eye E more appropriately and efficiently. In addition, since the measurement head 16 and the chin support part 18 are suspended, the main body part 10 is not disposed in front of the body of the subject P (more specifically, above the optometry table 12), and a space is formed. Therefore, the subject P can be examined in a comfortable position without being disturbed by the main body part 10, and further, the subject P can be examined more stably and efficiently while supporting his / her body by placing his / her hands on the optometry table 12.

[0071] In the ophthalmic device 100 of each of the above embodiments, a pair of measurement heads 16 are provided on the left and right corresponding to the left and right eyes E to be examined, and each measurement head 16 is individually suspended from the head support portion 13, and the chin supports 18, 18A, 18B are suspended between the pair of measurement heads 16. With this configuration, the ophthalmic device 100 can obtain information on both eyes E simultaneously or one eye at a time using the pair of measurement heads 16, and even when the measurement head 16 moves in the vertical direction, etc., stable support of the chin C is maintained without being affected by the vertical positions of the chin supports 18, 18A, 18B.

[0072] The chin supports 18, 18A, 18B in the above embodiments include vertical position adjustment mechanisms 183, 183A, 183B that can adjust the vertical position. With this configuration, the ophthalmologic apparatus 100 can appropriately adjust the vertical position (height) of the chin supports 18, 18A, 18B according to the vertical position of the chin C of the subject P.

[0073] Moreover, the vertical position adjustment mechanism 183, 183A of the first and second embodiments includes a screw portion 181a provided on the outer periphery of the lower end of the chin support bar 181, and a height adjustment screw 183c screwed to the outer periphery of the screw portion 181a so as to be movable up and down. The vertical position adjustment mechanism 183, 183A of the first and second embodiments may be configured to adjust the vertical position of the chin support unit 18, 18A by rotating in the vertical direction around an axis (rotation axis 184, pivot support unit 185) parallel to the left-right direction (X direction). The vertical position adjustment mechanism 183, 183A of the first and second embodiments may include a screw member that adjusts the vertical position of the chin support unit 18, 18A by rotating in a predetermined direction. Therefore, the vertical position of the chin support unit 18, 18A of the first and second embodiments can be appropriately adjusted by the vertical position adjustment mechanism 183, 183A of the simple configuration.

[0074] Furthermore, vertical position adjustment mechanism 183B of Example 3 is configured to adjust the vertical position of chin support portion 18B by moving (expanding and contracting) in the vertical direction (X direction). Therefore, the vertical position of chin support portion 18B of Example 3 can be appropriately adjusted by vertical position adjustment mechanism 183B of a simple configuration.

[0075] The chin supports 18, 18A, 18B of the third embodiment are provided with a front-rear position adjustment mechanism 187 that adjusts the position in the front-rear direction, which is the direction toward the subject P and the direction away from the subject P. With this configuration, the ophthalmologic apparatus 100 can appropriately adjust the front-rear position of the chin supports 18, 18A, 18B in accordance with the front-rear position of the chin C of the subject P in the front-rear direction.

[0076] The chin support parts 18, 18B in the above-mentioned Example 1 and Example 3 include a chin support bar 181 extending downward from the head support part 13, and a chin rest part 182, 182B extending from the chin support bar 181 toward the subject P and abutting against the chin C of the subject P. With this configuration, the chin support parts 18, 18B can support the front surface of the chin C.

[0077] The chin support part 18A of the above-mentioned second embodiment includes a chin support bar 181 extending downward from the head support part 13, and a chin rest part 182A extending from the chin support bar 181 toward the subject P and on which the chin C of the subject P is placed. With this configuration, the chin support part 18A can support the chin C from below, and the subject P can reduce the weight of the chin C by placing the chin C on the chin rest part 182A, making it easier to undergo the examination.

[0078] The ophthalmic device 100 of each of the above embodiments includes a measurement head 16 having a measurement optical system 21, an image acquisition unit that acquires an anterior eye image on the optical axis of the measurement optical system 21 of the subject's eye E, and a visual target presenting unit that presents a visual target to the subject's eye E, and a drive mechanism 15 that moves the measurement head 16 in the vertical and horizontal directions and rotates it about an axis parallel to the vertical direction and an axis parallel to the horizontal direction as a rotation axis. The measurement head 16 is suspended from the head support unit 13 via the drive mechanism 15. With this configuration, the measurement head 16 is freely moved by the drive mechanism 15, and information on the subject's eye E can be acquired more precisely and more appropriately. In addition, the chin support units 18, 18A, and 18B suspended from such an ophthalmic device 100 can maintain stable support of the chin C without being affected by the movement of the measurement head 16.

[0079] The above describes the ophthalmic device of the present disclosure based on examples and modified examples. However, the specific configuration is not limited to these examples and modified examples, and design changes and additions are permitted as long as they do not deviate from the gist of the invention related to each claim in the scope of the claims.

[0080] The chin support portions 18, 18A of the ophthalmic device 100 in the above-mentioned Examples 1 and 2 are configured so that the chin rest portion 182 or the chin rest portion 182A can rotate around the pivot portion 185 as a rotation axis, but this is not limited to this, and each portion may be configured so as to be rotatable around two rotation axes, the pivot portion 185 and the rotation axis 184, or each portion may be configured so as to be rotatable around three or more rotation axes.

[0081] In the ophthalmologic apparatus 100 of each of the above-mentioned embodiments, the vertical or front-rear position adjustment of the chin support portion 18 is performed manually or semi-automatically by rotating the height adjustment screw 183c, moving the cylindrical portion 188 up and down, or expanding and contracting the biasing member, but is not limited to this configuration. The vertical position adjustment mechanism 183 and the front-rear position adjustment mechanism 187 may be configured to include an electric mechanism such as an electric actuator and automatically adjust the vertical or front-rear position of the chin support portion 18.

[0082] Furthermore, the vertical position adjustment mechanism 183 and the front-rear position adjustment mechanism 187 may be configured to include a bellows mechanism, a pantograph structure, a flexible arm, or the like, and these may be used to adjust the position of the chin support portion 18 in the vertical or front-rear direction.

[0083] Furthermore, the chin supports 18, 18A, and 18C in the above embodiments are configured to be detachable from the mounting base 133, and any one of them can be selected and attached to or replaced with the mounting base 133 according to the user's request, etc. This configuration provides an ophthalmologic apparatus 100 that meets the user's preferences and intended use.

[0084] In addition, the ophthalmic device 100 of each of the above embodiments includes a measurement head 16 having a measurement optical system 21, and a drive mechanism 15 that moves the measurement head 16 in the vertical and horizontal directions and rotates it about an axis parallel to the vertical direction and an axis parallel to the horizontal direction as rotation axes, and the measurement head 16 is suspended from the head support portion 13 via the drive mechanism 15, and such an ophthalmic device 100 is provided with chin supports 18, 18A, and 18B.

[0085] On the other hand, as a modified example, the ophthalmic device 100 may be configured to include a measurement head having a measurement optical system including a plurality of test lenses selectively arranged in front of the subject's eye, and a visual target presenting unit that presents a visual target to the subject's eye. More specifically, the ophthalmic device may be an ophthalmic device equipped with a phoropter head and a visual target presenting unit as shown in the ophthalmic device described in JP 2023-048902 A. Such an ophthalmic device may also be provided with the chin supports 18, 18A, and 18B as in Examples 1 to 3.

[0086] Further, although the ophthalmologic apparatus 100 in each of the above-mentioned embodiments and modified examples includes a pair of measurement heads 16, this is not limited thereto, and the apparatus may also be configured to include only one measurement head 16 and acquire eye information for each eye.

[0087] In addition, the following will be further disclosed with respect to the above description of the first to third embodiments and the modified examples. (1) a measurement head having a measurement optical system for acquiring information on a subject's eye; a head support portion that suspends and supports the measuring head; A chin support part suspended from the head support part to support the chin of the subject. An ophthalmic apparatus comprising: (2) The measurement heads are provided in pairs on the left and right sides corresponding to the left and right eyes to be examined, and each measurement head is individually suspended from the head support part, The chin support is suspended between the pair of measuring heads. 4. The ophthalmic apparatus according to claim 1, (3) The chin support portion is provided with a vertical position adjustment mechanism that can adjust the vertical position. 4. The ophthalmic apparatus according to claim 1, wherein the first and second ophthalmic devices are arranged in a first and second plane. (4) The chin support unit includes a front-rear position adjustment mechanism that adjusts the position in the front-rear direction, which is a direction toward the subject and a direction away from the subject. The ophthalmologic apparatus according to any one of (1) to (3) above, (5) The chin support portion includes a chin support bar extending downward from the head support portion, and a chin rest portion extending from the support bar toward the subject and abutting against the subject's chin. The ophthalmologic apparatus according to any one of (1) to (4) above, (6) The chin support portion includes a chin support bar extending downward from the head support portion, and a chin rest portion extending from the support bar toward the subject and supporting the subject's chin. The ophthalmologic apparatus according to any one of (1) to (5) above, (7) The measurement optical system, an image acquisition unit that acquires an image of an anterior segment of the subject's eye on the optical axis of the measurement optical system; and the measurement head having an optotype presenting unit that presents an optotype to the subject's eye; a drive mechanism for moving the measuring head in a vertical direction and a horizontal direction and rotating the measuring head about an axis parallel to the vertical direction and an axis parallel to the horizontal direction as a rotation axis, The measuring head is suspended from the head support part via the driving mechanism. The ophthalmologic apparatus according to any one of (1) to (6) above, (8) The measurement head has the measurement optical system including a plurality of test lenses selectively disposed in front of the subject's eye; and a visual target presenting unit that presents a visual target to the subject's eye. The ophthalmologic apparatus according to any one of (1) to (6) above, [Explanation of symbols]

[0088] 13: Head support section 15: Driving mechanism 16: Measuring head 18: Chin support 18A: Chin support part 18B: Chin support part 18C: chin support part 21: measurement optical system 100: Ophthalmic device 181: Chin support bar 182: Chin rest 182A: Chin rest 182B: Chin rest 183: Up / down position adjustment mechanism 183B: Vertical position adjustment mechanism 187: Position adjustment mechanism C: Jaw E: Eye under examination P: Subject

Claims

1. a measurement head having a measurement optical system for acquiring information on the subject's eye; a head support portion that suspends and supports the measuring head; A chin support part suspended from the head support part to support the chin of the subject. An ophthalmic apparatus comprising:

2. the measurement heads are provided in pairs on the left and right corresponding to the left and right eyes to be examined, and each measurement head is individually suspended from the head support part; The chin support is suspended between the pair of measuring heads.

2. An ophthalmic apparatus according to claim 1.

3. The chin support portion is provided with a vertical position adjustment mechanism capable of adjusting the vertical position.

2. An ophthalmic apparatus according to claim 1.

4. The chin support portion includes a front-rear position adjustment mechanism that adjusts the position in the front-rear direction, which is a direction toward the subject and a direction away from the subject.

2. An ophthalmic apparatus according to claim 1.

5. The chin support portion includes a chin support bar extending downward from the head support portion, and a chin rest portion extending from the chin support bar toward the subject and abutting against the subject's chin.

2. An ophthalmic apparatus according to claim 1.

6. The chin support portion includes a chin support bar extending downward from the head support portion, and a chin rest portion extending from the chin support bar toward the subject and supporting the subject's chin.

2. An ophthalmic apparatus according to claim 1.

7. The measurement optical system, an image acquisition unit that acquires an image of an anterior segment of the subject's eye on the optical axis of the measurement optical system; and the measurement head having an optotype presenting unit that presents an optotype to the subject's eye; a drive mechanism for moving the measuring head in a vertical direction and a horizontal direction and rotating the measuring head about an axis parallel to the vertical direction and an axis parallel to the horizontal direction as a rotation axis, The measuring head is suspended from the head support part via the driving mechanism.

7. The ophthalmic apparatus according to claim 1,

8. the measurement head having the measurement optical system including a plurality of test lenses selectively disposed in front of the subject's eye; and a visual target presenting unit that presents a visual target to the subject's eye.

7. The ophthalmologic apparatus according to claim 1, wherein the ophthalmologic apparatus comprises:

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