Ophthalmologic equipment, jaw rest attachment

Abstract

To provide ophthalmologic equipment that enables an examination-target eye of a subject to be positioned at an appropriate position even if the size of the subject is smaller than an average size.SOLUTION: Ophthalmologic equipment A comprises: an acquisition optical system (50) for acquiring eye information of an examination-target eye E of a subject S; a jaw resting portion 30 supporting a jaw of the subject S movably in a vertical direction with respect to the acquisition optical system (50); and a jaw resting attachment 70 which can be attached to the jaw resting portion 30, and on which the jaw of the subject S can be rested. When the jaw resting portion 30 is moved, the jaw resting portion attachment 70 is moved in the vertical direction together with the jaw resting portion 30.SELECTED DRAWING: Figure 9

Description

[Technical field]

[0001] The present disclosure relates to ophthalmic devices and chin rest attachments for use therein. [Background technology]

[0002] There are known ophthalmic devices that can test the visual function of a subject's eye (eye examination) by acquiring various information about the subject's eye using an acquisition optical system and based on the subject's response regarding how a visual target presented to the subject's eye looks (see, for example, Patent Document 1). In this conventional ophthalmic device, the subject's chin is supported by a chin rest, and the acquisition optical system is positioned appropriately with respect to the subject's eye, thereby making it possible to appropriately acquire information about the subject's eye and perform an appropriate examination based on how a presented visual target looks. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2005-13472 A Summary of the Invention [Problem to be solved by the invention]

[0004] Here, in the above-mentioned conventional ophthalmic device, the height position of the chin rest is adjusted to place the subject's eye in an appropriate position relative to the acquisition optical system, but the chin rest is set based on subjects of average size and is not suitable for all subjects. Therefore, in the conventional ophthalmic device, there is a risk that the chin rest cannot be placed in an appropriate position for the subject within the movable range of the chin rest, or that it takes a long time to move it, and there is room for improvement.

[0005] The present disclosure has been made in consideration of the above-mentioned circumstances, and aims to provide an ophthalmic device that can quickly position the subject's eye in an appropriate position, even if the subject's eye is smaller than average in size. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, the ophthalmic device disclosed herein comprises an acquisition optical system for acquiring eye information of a subject's test eye, a chin rest section that supports the subject's chin so that it can be moved in an up-down direction relative to the acquisition optical system, and a chin rest attachment that can be attached to the chin rest section and on which the subject's chin can be placed, wherein the chin rest attachment moves in an up-down direction together with the chin rest section when the chin rest section is moved. Effect of the Invention

[0007] According to the ophthalmologic apparatus of the present disclosure, even if the subject is smaller than average in size, the subject's eye can be quickly brought into an appropriate position. [Brief description of the drawings]

[0008] [Figure 1] 1 is a perspective view showing an external configuration of an ophthalmologic apparatus according to a first embodiment, viewed obliquely from a chin rest side. [Diagram 2] 2 is a perspective view showing the external configuration of the ophthalmologic apparatus as viewed obliquely from the control panel side. FIG. [Diagram 3] 2 is a front view showing the external configuration of the ophthalmologic apparatus when the front of the main body is viewed from the chin rest side. FIG. [Figure 4] FIG. 2 is a side view showing a schematic configuration of built-in components and accessories of the ophthalmic apparatus. [Diagram 5] FIG. 2 is a block diagram showing a control system configuration of the ophthalmic apparatus. [Figure 6] FIG. 2 is an explanatory diagram showing a state in which a typical child subject's chin is placed on a chin rest. [Figure 7] 10 is an explanatory diagram showing a chin rest part to which a chin rest attachment is attached; FIG. [Figure 8] 10 is an explanatory diagram showing a state in which the chin rest attachment is attached to the chin rest portion. FIG. [Figure 9] FIG. 2 is an explanatory diagram showing a state in which the chin of a typical child subject is placed on the chin rest attachment. [Figure 10]13 is an explanatory diagram showing another example of a chin rest attachment. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] An embodiment of an ophthalmologic device according to the present disclosure will be described below with reference to Fig. 1 to Fig. 9. Fig. 6 partially illustrates the periphery of the chin rest in Fig. 4 in order to facilitate a comparison between a state in which a typical child subject has his chin rested on the chin rest and a state in which a typical adult subject has his chin rested on the chin rest. EXAMPLES

[0010] The ophthalmic apparatus of the first embodiment, as an example, observes, photographs, and records an anterior segment image of the subject's eye, a fundus image of the subject's eye, and a tomographic image of the fundus of the subject's eye, and provides them as electronic images for diagnosis. The ophthalmic apparatus requires so-called alignment to match a reference line (measurement optical axis L in the first embodiment) with the subject's eye (its center), and can perform any subjective or objective examination as long as it acquires ocular information of the subject's eye using an acquisition optical system. The subjective examination includes subjective refraction measurements such as far-distance examination, intermediate-distance examination, near-distance examination, contrast examination, and glare examination, as well as red-green examination and visual field examination. In the objective examination, the ophthalmic apparatus irradiates light to the subject's eye and measures (acquires) information (ocular characteristics) about the subject's eye based on the detection result of the return light. The objective examination includes measurement for acquiring characteristics of the subject's eye and photography for acquiring an image of the subject's eye. Furthermore, objective examinations include objective refraction measurement (refrometry), corneal shape measurement (keratometry), intraocular pressure measurement, fundus photography, and measurements using OCT.

[0011] In the ophthalmic device A of the first embodiment, information on the eye E to be examined of the subject S is acquired while the subject S facing the ophthalmic device A places his / her forehead on the chin rest 30 (forehead rest 33b thereof) provided on the main body 20 (see FIG. 4). In the following, the left-right axis in the left-right direction (horizontal direction) as viewed from the subject S facing the ophthalmic device A is indicated by arrow X (X-axis), the up-down axis in the up-down direction (vertical direction) is indicated by arrow Y (Y-axis), and the direction perpendicular to the left-right direction and the up-down direction (depth direction of the ophthalmic device A) is indicated as the front-back direction (front-back axis) by arrow Z (Z-axis).

[0012] [Overall equipment configuration] The ophthalmic device A is a three-dimensional fundus imaging device, and includes a fundus camera for acquiring a fundus image of the subject's eye E, and an OCT (short for "Optical Coherence Tomography") for acquiring a fundus tomographic image of the subject's eye E. Here, the "fundus camera" refers to a camera that images the fundus state of the retina, optic nerve, capillaries, etc. at the back of the subject's eye E and captures the fundus image. "OCT" refers to an optical coherence tomography that uses the interference of light to image the tomographic layer of the retina present at the fundus of the subject's eye E and captures the fundus tomographic image. As shown in Figs. 1 to 4, the ophthalmic device A includes a stand unit 10, a main body unit 20, a chin rest unit 30, a control panel unit 40, a measurement optical system 50, and a control unit 60.

[0013] The stand 10 is placed on a height-adjustable optometry table T (see FIG. 4) or the like. The main body 20 is supported on the top surface of the stand 10 so as to be movable in three axial directions, namely, the X-axis, the Y-axis, and the Z-axis. A chin rest 30 is fixed to the front surface of the stand 10. A power switch 11 (see FIG. 1), a power inlet 12 (see FIG. 1), a LAN terminal 13 (see FIGS. 2 and 4), and a USB terminal 14 (see FIGS. 2 and 4) are provided on the side surface of the stand 10. Note that LAN is an abbreviation for "Local Area Network" and USB is an abbreviation for "Universal Serial Bus." A personal computer 16 on which dedicated software or the like is installed is connected to the LAN terminal 13 via a LAN cable 15 (see FIG. 4). The USB terminal 14 is a terminal for connecting an external memory, and is connected to an HDD (abbreviation for "Hard Disk Drive"), a USB memory, or the like.

[0014] As shown in FIG. 4 and the like, a power supply unit 17 and an XYZ driving unit 18 are built into the internal space of the stand unit 10. The power supply unit 17 includes a power switch 11, a power inlet 12, a LAN terminal 13, a USB terminal 14, and the like. The XYZ driving unit 18 is a motor actuator having a motor and a motor driving circuit for driving the main body unit 20 in three axial directions of the X, Y, and Z axes, and can move the main body unit 20 relative to the stand unit 10 in alignment control and the like. For this reason, the main body unit 20 can be moved in the X-axis direction, the Y-axis direction, and the Z-axis direction by the XYZ driving unit 18 relative to the stand unit 10 and the chin rest unit 30 fixed thereto. For this reason, in the ophthalmologic apparatus A of the first embodiment, the XYZ driving unit 18 functions as an optical system moving unit. In the main body unit 20, a measurement optical system 50 and a control unit 60 are built into a main body cover 21 that covers the entire body. The measurement optical system 50 measures ocular characteristics of the subject's eye E with the subject's chin supported on the chin rest 30. For this reason, in the ophthalmic apparatus A of the first embodiment, the measurement optical system 50 functions as an acquisition optical system for acquiring ocular information of the subject's eye E.

[0015] A control panel unit 40 is disposed at an upper position on the back surface of the main body cover 21 (see Figs. 1, 2, and 4). An objective lens 51 of a measurement optical system 50 is provided at the center of the front surface of the main body cover 21 (see Fig. 3, etc.), and the objective lens 51 can be made to face the subject's eye E. An anterior eye stereo camera 22 (anterior eye camera), a peripheral fixation lamp 23, and an anterior eye observation filter 24 are provided around the objective lens 51.

[0016] The anterior eye stereo camera 22 is used to obtain the relative position between the main body 20 (measurement optical system 50) and the subject's eye E, and has a first camera 22a and a second camera 22b that are provided as a pair on both sides of the objective lens 51. The first camera 22a and the second camera 22b each have a plurality of optical members and an imaging element, and are disposed with their optical axes tilted toward the anterior eye of the subject's eye E, which is the measurement target. The first camera 22a and the second camera 22b substantially simultaneously obtain a right anterior eye image and a left anterior eye image that are cut out from a part of the face of the subject S supported by the chin rest 30. Therefore, the anterior eye stereo camera 22 functions as a camera that captures an anterior eye image including the subject's eye E of the subject S supported by the chin rest 30. The anterior eye stereo camera 22 can specify the three-dimensional coordinate position of the subject's eye E by performing calculation processing on two anterior eye images using the width dimension and tilt angle in the X-axis direction of the pair of the first camera 22a and the second camera 22b. The first camera 22a and the second camera 22b may be variable magnification cameras that can switch the shooting magnification (focal length) between high and low magnifications or change the magnification steplessly. The anterior eye stereo camera 22 may be a single camera or may have another configuration as long as it captures an anterior eye image including the subject's eye E of the subject S supported by the chin rest 30, and is not limited to the configuration of the first embodiment.

[0017] The peripheral fixation lights 23 are fixation lights used to fix the line of sight of the subject's eye E by turning them on, and eight of them are arranged at equal intervals around the outer periphery of the objective lens 51. The anterior eye observation filters 24 are filters used to adjust the amount of light during anterior eye observation or anterior eye OCT, and are arranged vertically, two of them on each side of the outer positions of the first camera 22a and the second camera 22b (a total of four filters).

[0018] The chin rest 30 is provided so that its height position (position in the Y-axis direction) can be adjusted relative to the chin rest support 31 fixed to the pedestal 10, and supports the chin of the subject S. The chin rest 30 has a lifting rod 30a, a chin rest 30b, and a chin rest paper attachment pin 30c. The lifting rod 30a can be raised and lowered by a built-in chin rest drive 32, and the height position of the chin rest 30b can be adjusted by raising and lowering the lifting rod 30a. The chin rest paper attachment pin 30c can be fitted into pin holes 30d (see FIG. 8) provided on both sides of the chin rest 30b, and the chin rest paper can be fixed on the chin rest 30b. The chin rest drive 32 is a motor actuator having a motor and a motor drive circuit that drives the lifting rod 30a in the Y-axis direction, and can move the chin rest 30 in the Y-axis direction relative to the chin rest support 31 (the pedestal 10 on which it is provided) in alignment control. Therefore, the chin rest drive portion 32 can change the support position in the chin rest portion 30 .

[0019] As shown in Fig. 3 and other figures, face support frame parts 33 are fixed to both ends of the T-shape of the chin rest support part 31. The face support frame part 33 is shaped to surround the face of the subject S, whose chin is supported by the chin rest part 30, in three directions. In the face support frame part 33, a pair of vertical frames extending in the Y-axis direction are provided with eye height marks 33a (see Fig. 4) that serve as a guide for the height position of the subject's eye E relative to the measurement optical system 50. In addition, in the face support frame part 33, a removable forehead rest part 33b made of silicone rubber or the like is provided on a horizontal frame connecting the upper ends of the pair of vertical frames.

[0020] In this face support frame unit 33, an arm 34 that can be bent in multiple stages is provided at the central upper position of the horizontal frame, and an external fixation lamp 35 is provided at the tip of the arm 34. The external fixation lamp 35 is composed of a light-emitting diode or the like, and functions as an external fixation target for fixing the subject's eye E by being turned on while being positioned at any position in a three-dimensional direction by the arm 34. The chin rest unit 30 is not limited to a configuration connected to the base unit 10, and may be configured to be separated from the base unit 10 and installed on the optometry table T. The subject S faces the main body unit 20, places his chin on the chin rest 30b, and places his forehead on the forehead rest unit 33b to stabilize his face (head) and receive measurement of test information. The chin rest unit 30 may be any unit that supports and stabilizes the chin of the subject S so that the face (head) of the subject S does not move unexpectedly during measurement of test information of the subject's eye E, and is not limited to the configuration of Example 1.

[0021] The control panel unit 40 is disposed at an upper position on the back surface of the main body cover 21, and has a display screen 41. This display screen 41 can display an anterior eye image of the subject's eye E from the anterior eye stereo camera 22, an anterior eye observation image of the subject's eye E from the measurement optical system 50, and the like. The display screen 41 of the first embodiment is configured as a touch panel type in which a touch sensor is laminated on the surface of a color liquid crystal panel, and an examiner can perform input operations to the control unit 60 by touching the displayed button images, images, and the like with his / her finger.

[0022] The control panel unit 40 is attached to the main body unit 20 (main body cover 21) via a connecting support unit 42. The connecting support unit 42 has a support structure that combines a rotational support that allows the display screen 41 to be set at any position in the entire circumferential direction relative to the main body unit 20, and a bending support that allows the inclination angle of the display screen 41 relative to the main body unit 20 to be freely set. Therefore, the control panel unit 40 can be arranged at a position where the examiner can easily operate the display screen 41 regardless of where the examiner is located around the ophthalmic apparatus A, and can be used when the examiner is close to the examinee S to examine the eye characteristics.

[0023] Here, in the ophthalmic apparatus A, an examiner can perform an examination of eye characteristics by remote operation from a position away from the subject S. As an example of this, the ophthalmic apparatus A is provided with a tablet 40' for remote operation (see FIG. 2). The tablet 40' for remote operation is a mobile terminal (information processing device) such as a tablet terminal or a smartphone, and has an input operation function equivalent to that of the control panel unit 40 as well as a communication function with the main body unit 20, and has a display screen 41' of a touch panel that allows touch operation. The tablet 40' for remote operation is not limited to a mobile terminal, and may be a notebook personal computer, a desktop personal computer, or the like, or may be fixed to the ophthalmic apparatus A, and is not limited to the configuration of the first embodiment. For this reason, the control panel unit 40 (display screen 41) and the tablet 40' for remote operation (display screen 41') function as a display unit that displays an anterior eye image.

[0024] As shown in Figs. 4 and 5, the measurement optical system 50 has a fundus camera unit 52 and an OCT unit 53. The fundus camera unit 52 includes an illumination optical system having an objective lens 51 (see Fig. 3, etc.) provided at the front position of the main body cover 21, and an imaging optical system, and constitutes a fundus camera that acquires an anterior eye image and a fundus image of the subject's eye E by an imaging element or the like provided therein. The acquired image is, for example, a front image such as an observation image obtained by video shooting using near-infrared light, or a still image captured using flash light. The OCT unit 53 captures a fundus tomographic image (OCT photography) of the subject's eye E using optical coherence tomography ("OCT") that acquires a fundus tomographic image by a wavelength-variable light source, a fiber coupler, or the like. The OCT unit 53 is provided with an optical system for performing, for example, swept-source OCT. The optical system includes an interference optical system that splits light from a wavelength-variable light source (wavelength-swept light source) into measurement light and reference light, superimposes the return light of the measurement light from the test eye E with the reference light that has passed through the reference light path to generate interference light, and detects this interference light.

[0025] The measurement optical system 50 is capable of acquiring an anterior segment observation image of the subject's eye E in addition to a fundus image and a fundus tomographic image of the subject's eye E, and outputs the detection results (detection signals) obtained by these and the interference optical system to a control unit 60 (main control unit 61 described later) as appropriate. In the measurement optical system 50, a reference line is set as a reference for adjusting the relative positional relationship with the subject's eye E described later, and in Example 1, the measurement optical axis L (see FIG. 3) of the illumination optical system and the photographing optical system is set as the reference line. In Example 1, the measurement optical axis L passes through the center position of the objective lens 51.

[0026] [Control system configuration] As shown in Fig. 5, the control system of the ophthalmic apparatus A includes a control panel unit 40 (display screen 41), a measurement optical system 50 (fundus camera unit 52, OCT unit 53), and a control unit 60. The control unit 60 includes, as hardware components, a control board 60a, a CPU board 60b, and an image board 60c (see Fig. 4). The control unit 60 comprehensively controls the ophthalmic apparatus A (fundus camera unit 52, OCT unit 53, chin rest unit 30, main body unit 20, etc.) based on input operations to the control panel unit 40, including touch operations to the display screen 41.

[0027] The control unit 60 performs automatic alignment (automatic positioning (automatic adjustment)) between the subject's eye E and the main body 20 (the measurement optical axis L (objective lens 51) of the measurement optical system 50), and drives the measurement optical system 50 to acquire eye information of the subject's eye E. In detail, first, the control unit 60 determines the position (for example, the relative position with respect to the main body 20) of the subject's eye E of the subject S with the chin resting on the chin rest 30 based on the anterior eye image acquired by the anterior eye stereo camera 22. Next, based on the alignment information from the measurement optical system 50, the control unit 60 calculates a movement amount (alignment information) that aligns the measurement optical axis L of the measurement optical system 50 with the axis of the subject's eye E and makes the distance of the measurement optical system 50 to the subject's eye E a predetermined working distance. Here, the working distance is a preset value also called a working distance, and is the distance between the measurement optical system 50 and the subject's eye E for appropriately measuring the characteristics using the measurement optical system 50. The control unit 60 drives the XYZ drive unit 18 according to the movement amount to move the main body unit 20 (measurement optical system 50) relative to the subject eye E, thereby aligning the measurement optical system 50 in the XYZ directions with the corresponding subject eye E. Thereafter, the control unit 60 appropriately drives the measurement optical system 50 to acquire various types of eye information of the subject eye E.

[0028] The control unit 60 includes a main control unit 61, a storage unit 62, and an alignment control unit 63. The main control unit 61 controls the fundus camera unit 52 and the OCT unit 53 in response to an input operation to the control panel unit 40. The storage unit 62 can store appropriate data under the control of the main control unit 61 and the alignment control unit 63, and can retrieve the data. The data includes, for example, an OCT image, an anterior eye image, a fundus image, and information on the subject's eye. The information on the subject's eye includes, for example, patient ID (identification) information (subject information such as name), identification information for the left eye / right eye, and electronic medical record information. The main control unit 61 also performs various image processing and various analysis processing on the images (fundus image, anterior eye observation image, etc.) acquired by the fundus camera unit 52 and the anterior eye image acquired by the anterior eye stereo camera 22 as appropriate. Furthermore, the main control unit 61 performs operations such as creating three-dimensional image data (stack data, volume data, etc.) based on the OCT raster scan data from the OCT unit 53, rendering the three-dimensional image data, image correction, and image analysis based on an analysis application.

[0029] The alignment control unit 63 performs alignment control to adjust the relative positional relationship between the subject's eye E and the main body unit 20 (the measurement optical axis L (objective lens 51) of the measurement optical system 50) based on the anterior eye image acquired by the anterior eye stereo camera 22. During this alignment control, the anterior eye image is appropriately displayed on the display screen 41 of the control panel unit 40.

[0030] The alignment control unit 63 acquires anterior eye images by having the anterior eye stereo camera 22 (first camera 22a, second camera 22b) capture images of the left and right eyes from two directions, and acquires anterior eye observation images by having the measurement optical system 50 capture images of the right and left eyes. The alignment control unit 63 adjusts the relative positional relationship between the subject's eye E and the main body unit 20 (measurement optical axis L) by a drive command output to at least one of the XYZ drive unit 18 and the chin rest drive unit 32. Here, the XYZ drive unit 18 and the chin rest drive unit 32 are used differently as follows. First, the XYZ drive unit 18 is movable in three axial directions of the XYZ axes, whereas the chin rest drive unit 32 is movable only in the Y axis direction. In addition, in the movement in the Y axis direction, the chin rest drive unit 32 has a larger movable range than the XYZ drive unit 18. Therefore, if the adjustment movement amount is only the XZ axis movement amount, the XYZ drive unit 18 is used. Furthermore, if the amount of adjustment movement in the Y-axis direction is within the movable range of the XYZ drive unit 18, the XYZ drive unit 18 is used, and if it exceeds the movable range of the XYZ drive unit 18, the chin rest drive unit 32 is also used.

[0031] The alignment control unit 63 of the first embodiment performs, as alignment control, a precise alignment control (precise adjustment control) for matching the position of the pupil with the measurement optical axis L (center position of the image) of the measurement optical system 50, and a coarse alignment control (coarse adjustment control) for bringing the pupil and the measurement optical axis L of the measurement optical system 50 closer to a position where the precise alignment control is possible. That is, in the ophthalmic apparatus A, the position of the subject's eye E is detected in the coarse alignment control to perform a rough position adjustment, and then a precise position adjustment (fine alignment adjustment) is performed by the precise alignment control, focusing and optical path length adjustment are performed in the measurement optical system 50, and then measurement is performed by the measurement optical system 50. The coarse alignment control and the precise alignment control can be performed automatically under the control of the control unit 60, and are therefore also referred to as automatic alignment control below. In the first embodiment, for movement in the Y-axis direction, the XYZ drive unit 18 and the chin rest drive unit 32 are used appropriately for the coarse alignment control described below, and the XYZ drive unit 18 is used for the precise alignment control described below.

[0032] The alignment control unit 63 has an information acquisition unit 631, a start position control unit 632, an imaging start control unit 633, and an alignment control unit 634. The information acquisition unit 631 acquires various information of the subject. The information acquisition unit 631 of the first embodiment acquires patient ID information, electronic medical record information, and the like from the storage unit 62. This patient ID information is information previously obtained from the subject S and inputted by the personal computer 16, the control panel unit 40 (display screen 41), or the remote control tablet 40' (display screen 41'), and includes information such as the date of birth and age of the subject S. The electronic medical record information is the results of various examinations that the subject S has performed up to now, and includes information on the position of the chin rest unit 30 relative to the main body unit 20 (its measurement optical system 50) in each examination. The information acquisition unit 631 may have other configurations as long as it acquires patient ID information, electronic medical record information, and the like, and is not limited to the configuration of the first embodiment.

[0033] The start position control unit 632 sets the start position of the chin rest unit 30 relative to the main body unit 20 (its measurement optical system 50) so that alignment control can be performed appropriately, and drives the chin rest drive unit 32 to move the chin rest unit 30 to the start position. The start position control unit 632 can also drive the XYZ drive unit 18 as an optical system moving unit to move the main body unit 20 (its measurement optical system 50), and can assist in the movement of the chin rest unit 30 to the start position. The start position control unit 632 of the first embodiment may set the start position according to the patient ID information and electronic medical record information acquired from the information acquisition unit 631, or may use a predetermined start position. Therefore, the start position control unit 632 functions as a control unit that performs drive control of the chin rest drive unit 32 as a face support drive unit and drive control of the XYZ drive unit 18 as an optical system moving unit.

[0034] The photography start control unit 633 performs photography start control to determine whether or not automatic alignment control can be performed, and determines whether or not the subject's eye E is reflected in the anterior eye image acquired by the anterior eye stereo camera 22, and outputs the determination result. Then, when the subject's eye E is detected in the anterior eye image from the anterior eye stereo camera 22, the photography start control unit 633 switches to automatic alignment control.

[0035] When the subject's eye E is reflected in the displayed anterior eye image, the alignment control unit 634 performs automatic alignment control to align the measurement optical axis L of the main unit 20 with the pupil (its center) of the subject's eye E. When the subject's eye E is touched on the anterior eye image of the display screen 41, the alignment control unit 634 performs coarse alignment control to move the main unit 20 (measurement optical axis L) toward the position of the subject's eye E and position the subject's eye E near the measurement optical axis L of the main unit 20. When it is confirmed that the pupil of the subject's eye E is positioned near the measurement optical axis L of the main unit 20, the alignment control unit 634 drives the XYZ drive unit 18 so that the center position of the pupil of the anterior eye image is positioned on the measurement optical axis L, while performing fine alignment control to determine whether the pupil of the subject's eye E (its center) coincides with the measurement optical axis L based on a signal from an alignment mechanism in the optical system of the measurement optical system 50. In this way, the alignment control unit 634 executes automatic alignment control in which rough alignment control and precise alignment control are successively performed, thereby making it possible to align the measurement optical axis L of the main body unit 20 with the pupil (its center) of the subject's eye E. Note that this position adjustment (alignment) is performed by automatic control (automatic alignment control) based on two anterior eye images from the anterior eye stereo camera 22, but it can also be performed manually by the examiner using the chin rest up / down movement button.

[0036] Here, since subjects have different face sizes, even if the chin rest 30 is moved, the subject's eye E may not be at an appropriate height. First, generally, the size of a person's face, particularly the distance from the chin to the subject's eye E, changes with age. That is, the subject S of model Ma, which is the average of a general adult, can place the subject's eye E at a height position substantially equal to the eye height mark 33a of the face support frame part 33 when the subject S places his / her chin on the chin rest 30 (its chin rest 30b) as shown in FIG. 4. In this way, the ophthalmic device A can adjust the height position of the chin rest 30 for the subject S of model Ma to an appropriate height position with respect to the measurement optical system 50, and can perform appropriate measurement by the measurement optical system 50. Furthermore, since the subject S of the model Ma can properly place his / her forehead against the forehead support portion 33b of the face support frame portion 33, the distance in the Z-axis direction from the main body portion 20 (the objective lens 51 of the measurement optical system 50) can be properly maintained, so that contact between the subject S and the main body portion 20 can be prevented and proper measurement can be performed by the measurement optical system 50.

[0037] In contrast, in the case of subject S of model Mc, which is the average height of a general child (e.g., 2 to 8 years old), the subject's eye E is at a height position considerably lower than the eye height mark 33a when the subject rests his / her chin on the chin rest 30 (its chin rest 30b) as shown in Fig. 6. This is because, in general, when the skeleton is formed as the subject grows from model Mc (child) to model Ma (adult), the degree of change in the mandible is large, and therefore the distance from the chin to the subject's eye E changes greatly. Thus, the ophthalmologic apparatus A cannot set the subject S of model Mc at an appropriate height position even if the height position of the chin rest 30 is adjusted, making it difficult to perform an appropriate measurement.

[0038] In addition, the subject S of the model Mc cannot properly place the forehead on the forehead support portion 33b of the face support frame portion 33, so that even if the chin is placed on the chin rest portion 30 (chin rest 30b), there is a possibility that the periphery of the subject's eye E may move in the Z-axis direction. If the periphery of the subject's eye E moves forward, it may come into contact with the main body portion 20, which is undesirable, and if it moves backward, the accuracy of the measurement in the measurement optical system 50 may be affected. For this reason, in the ophthalmic device A, the distance in the Z-axis direction between the subject S and the main body portion 20 (the objective lens 51 of the measurement optical system 50) cannot be properly set, and the examiner is required to pay close attention not to bring the subject S into contact with the main body portion 20, and there is a possibility that the measurement optical system 50 may not be able to perform a proper measurement. For this reason, the ophthalmic device A of the first embodiment uses the chin rest attachment 70.

[0039] [Configuration of Chin Rest Attachment 70] 7 and 8, the chin rest attachment 70 has a mounting portion 71, a support shaft portion 72, a chin rest portion 73, and a frame portion 74. The mounting portion 71 is long in the X-axis direction and is plate-shaped so as to be fitted to the chin rest 30b of the chin rest portion 30, and is provided with a pair of mounting holes 71a (see FIG. 8). Both mounting holes 71a are positioned in a positional relationship corresponding to the pin holes 30d provided on both sides of the chin rest 30b, and each of the mounting holes 71a can receive the chin rest paper mounting pins 30c.

[0040] The support shaft portion 72 is rod-shaped and extends in the Y-axis direction from approximately the center of the attachment portion 71, and the chin rest portion 73 is fixed to its upper end. The support shaft portion 72 supports the chin rest portion 73 at a distance from the attachment portion 71, and may be configured such that its length is adjustable.

[0041] The chin rest portion 73 is a long plate in the X-axis direction, and can be used to place the chin of the subject S of the model Mc (see FIG. 9). The chin rest portion 73 is provided with pin holes 73a (see FIG. 8) on both sides, into which paper attachment pins 73b can be fitted. With the chin rest paper placed on the chin rest portion 73, the chin rest paper can be fixed by fitting both paper attachment pins 73b into both pin holes 73a.

[0042] The frame section 74 is shaped to surround the face of the subject S of the model Mc, whose chin is supported by the chin rest section 73, in three directions. That is, the frame section 74 is configured such that the upper ends of a pair of vertical frames extending in the Y-axis direction are connected by a horizontal frame. This frame section 74 is sized and sized to fit inside the face support frame section 33 when attached to the chin rest section 30. In the frame section 74, a removable forehead rest section 75 made of silicone rubber or the like is provided on the horizontal frame connecting the upper ends of the pair of vertical frames. This forehead rest section 75 is positioned and sized so that the forehead of the subject S of the model Mc, whose chin is placed on the chin rest section 73, can be placed on it.

[0043] [Installation of Chin Rest Attachment 70] The chin rest attachment 70 is attached to the chin rest 30 as shown in FIG. 8. First, the attachment portion 71 is placed on the chin rest 30b, and in this state, the chin rest paper attachment pin 30c passed through both attachment holes 71a is fitted into both pin holes 30d of the chin rest 30b. As a result, the attachment portion 71 is fixed to the chin rest 30b, and the chin rest attachment 70 is attached to the chin rest 30 (see FIG. 7 and FIG. 9). Therefore, the ophthalmic device A can move the chin rest 30 (the chin rest 30b) in the vertical direction, and can also move the chin rest portion 73 of the chin rest attachment 70 in the vertical direction by the same amount. Therefore, the ophthalmic device A can substantially move the height position of the chin by the chin rest 30b of the chin rest 30 to the upper side in the vertical direction by the dimension from the attachment portion 71 to the chin rest portion 73 of the chin rest attachment 70.

[0044] [Function of Chin Rest Attachment 70] 9, the chin rest attachment 70 is used when measuring a subject S of model Mc. The subject S of model Mc can place the chin on the chin rest part 73 of the chin rest attachment 70 attached to the chin rest part 30 (its chin rest 30b) to bring the subject's eye E to a height position substantially equal to the eye height mark 33a of the face support frame part 33. In this way, the ophthalmologic apparatus A can bring even the subject S of model Mc to an appropriate height position by adjusting the height position of the chin rest part 30 while using the chin rest attachment 70, and can perform appropriate measurement by the measurement optical system 50.

[0045] The chin rest attachment 70 is also capable of placing the forehead of the subject S of the model Mc, who has his or her chin rested on the chin rest section 73, against the forehead rest section 75. The chin rest attachment 70 is attached to the chin rest 30b by both chin rest paper mounting pins 30c and both pin holes 30d, so that the vertical positions and Z-axis positions of the chin rest section 73 and the forehead rest section 75 are set based on the chin rest 30b. Therefore, the chin rest attachment 70 can position the subject S of the model Mc at an appropriate height relative to the main body section 20 (the objective lens 51 of the measurement optical system 50), and can make the positional relationship in the Z-axis direction appropriate. As a result, the chin rest attachment 70 can prevent the subject S of the model Mc from contacting the main body section 20, and can also allow the measurement optical system 50 to perform appropriate measurement.

[0046] Furthermore, the chin rest attachment 70 is attached to the chin rest 30b by the chin rest paper attachment pins 30c and the pin holes 30d. In an ophthalmic device, if the chin rest paper is attached to the place where the chin is placed (chin rest 30b), the interval and dimensions of the pin holes 30d in the chin rest part 30 (the chin rest 30b) and the dimensions of the chin rest paper attachment pins 30c are substantially uniform even if the model has a different type of measurement or purpose or is manufactured by a different manufacturer. Therefore, the chin rest attachment 70 can be attached to the place where the chin is placed, even if the model has a different type of measurement or purpose or is manufactured by a different manufacturer, and can be measured at an appropriate height.

[0047] [Effects of ophthalmic devices and chin rest attachments] The ophthalmic apparatus A and the chin rest attachment 70 of the first embodiment according to the present disclosure can provide the following operational effects. The ophthalmic device A includes a measurement optical system 50 as an acquisition optical system for acquiring ocular information of the subject's eye E of the subject S, a chin rest part 30 that supports the chin of the subject S so as to be movable in the vertical direction relative to the measurement optical system 50, and a chin rest attachment 70 that can be attached thereto and on which the chin of the subject S can be placed. When the chin rest part 30 is moved, the chin rest attachment 70 is moved in the vertical direction together with the chin rest part 30. Therefore, even if the subject S is a model Mc whose skeleton is smaller than the average size, the ophthalmic device A can position the subject's eye E at an appropriate height relative to the measurement optical system 50, and can be appropriately measured by the measurement optical system 50. In addition, since the ophthalmic device A only needs to attach the chin rest attachment 70 to the chin rest part 30, the subject's eye E can be quickly positioned at an appropriate position relative to the measurement optical system 50, regardless of whether the subject S is a model Ma whose skeleton is average size or a model Mc whose skeleton is smaller than the average size.

[0048] In the ophthalmic apparatus A, the chin rest section 30 has a chin rest 30b on which the chin of the subject S is placed, and a pair of chin rest paper mounting pins 30c provided thereon as mounting pins. In addition, the chin rest attachment 70 has a chin rest section 73 on which the chin of the subject S is placed, and a mounting section 71 that can be fitted to the chin rest 30b, and the mounting section 71 is provided with a pair of mounting holes 71a through which the mounting pins (chin rest paper mounting pins 30c) can pass. Therefore, in the ophthalmic apparatus A, the chin rest attachment 70 can be attached to the chin rest 30b by both chin rest paper mounting pins 30c, so that the position of the chin rest section 73 can be set based on the chin rest 30b. As a result, the ophthalmic device A can maintain an appropriate distance in the Z-axis direction with the measurement optical system 50 even for the subject S of model Mc using the chin rest attachment 70, preventing contact between the subject S and the measurement optical system 50 and enabling appropriate measurements to be performed using the measurement optical system 50.

[0049] Furthermore, the ophthalmic apparatus A has a forehead rest 75 on which the chin rest attachment 70 can be placed against the forehead of the subject S with his / her chin resting on the chin rest 73. Therefore, the ophthalmic apparatus A can more appropriately prevent the subject S with his / her chin resting on the chin rest 73 from moving back and forth, more appropriately prevent contact between the subject S and the measurement optical system 50, and can perform appropriate measurement using the measurement optical system 50.

[0050] The chin rest attachment 70 can be attached to the chin rest 30 of the ophthalmic apparatus A, which includes a measurement optical system 50 as an acquisition optical system for acquiring ocular information of the subject's eye E of the subject S, and a chin rest 30 that supports the chin of the subject S so as to be movable in the vertical direction relative to the measurement optical system 50. The chin rest attachment 70 has a chin rest table 73 on which the chin of the subject S is placed, and a mounting section 71 that can be fitted to the chin rest 30b of the chin rest 30, and the mounting section 71 is provided with a pair of mounting holes 71a through which the chin rest paper mounting pins 30c as a pair of mounting pins provided on the chin rest 30b can pass. Therefore, the chin rest attachment 70 can be attached to the location where the chin is placed, even if the ophthalmic apparatus has a different type of measurement or purpose or is made by a different manufacturer, and can enable measurement at an appropriate height position. Furthermore, the chin rest attachment 70 can set the position of the chin rest part 73 based on the chin rest 30b, and can appropriately set the vertical positional relationship and the distance in the Z-axis direction between the subject S of the model Mc with his chin rested thereon and the measurement optical system 50. Therefore, the chin rest attachment 70 can prevent contact between the subject S and the measurement optical system 50, and enables the measurement optical system 50 to perform appropriate measurement.

[0051] Therefore, in the ophthalmologic apparatus A according to one embodiment of the present disclosure, even if the subject S is smaller than average in size, the subject's eye E can be quickly brought into an appropriate position.

[0052] The above describes the ophthalmic device of the present disclosure based on Example 1. However, the specific configuration is not limited to Example 1, and design changes and additions are permitted as long as they do not deviate from the gist of the invention according to each claim in the scope of the claims.

[0053] For example, in the first embodiment, an application example to an ophthalmic device A that observes, photographs, and records an anterior eye image of the subject's eye, a fundus image of the subject's eye, and a tomographic image of the fundus of the subject's eye, and provides them as electronic images for diagnosis has been shown. However, as long as the ophthalmic device acquires ocular information of the subject's eye E with an acquisition optical system (measurement optical system 50 in the first embodiment) for a subject S with his or her chin resting on a chin rest, it can be applied regardless of whether it is a subjective ophthalmic device or an objective ophthalmic device, and is not limited to the configuration of the first embodiment. In addition, the chin rest attachment 70 may be attached to an ophthalmic device of another configuration, as long as the chin rest is moved up and down relative to the acquisition optical system, and is not limited to the configuration of the first embodiment.

[0054] In addition, in the first embodiment, the attachment portion 71 is attached to the chin rest 30b by utilizing both chin rest paper attachment pins 30c and both pin holes 30d provided in the chin rest portion 30. However, the present invention is not limited to the configuration of the first embodiment as long as the chin rest attachment 70 is attached to the chin rest portion 30 so that the chin rest attachment 70 moves in the up and down direction together with the chin rest portion 30.

[0055] Furthermore, in the first embodiment, the mounting portion 71 of the chin rest attachment 70 is in the form of a plate that can be fitted to the chin rest 30b of the chin rest 30. However, as long as the mounting portion 71 can be fitted to the chin rest 30b and can be fixed to the chin rest 30b using a pair of mounting pins (the chin rest paper mounting pins 30c in the first embodiment), the shape and the like of the mounting portion 71 may be appropriately set and is not limited to the configuration of the first embodiment.

[0056] The chin rest attachment 70 of the first embodiment may be configured so that the frame portion 74 (forehead rest portion 75) is detachable. As a result, when the subject S who has placed his / her chin on the chin rest portion 73 can place his / her forehead on the forehead rest portion 33b of the face support frame portion 33, the chin rest attachment 70 can fix the subject S at an appropriate position using the forehead rest portion 33b. In addition, the chin rest attachment 70 of this configuration can also accommodate, for example, a case in which the subject S who has placed his / her chin on the chin rest portion 73 cannot use the forehead rest portion 75 well. In this way, the chin rest attachment 70 can flexibly accommodate the subject S by making the frame portion 74 (forehead rest portion 75) detachable. Furthermore, the chin rest attachment 70 may not have the frame portion 74 (forehead rest portion 75) from the beginning, and is not limited to the configuration of the first embodiment.

[0057] In the chin rest attachment 70 of the first embodiment, the pair of vertical frames of the frame portion 74 may be configured to be extendable and retractable, or the horizontal frame may be configured to be extendable and retractable. This allows the chin rest attachment 70 to flexibly accommodate a variety of children, who generally have large individual differences, and allows the examinee's eyes to be quickly positioned appropriately with respect to the measurement optical system 50.

[0058] In the first embodiment, the chin rest attachment 70 is configured as described above, but it may be configured as a chin rest attachment 70A shown in FIG. 10. In this chin rest attachment 70A, cheek rests 76 are provided on both sides of the chin rest section 73. These cheek rests 76 are in the front side (the main body section 20 (the measurement optical system 50) side) of the chin rest section 73, and are plate-shaped to bridge the chin rest section 73 and a pair of vertical frames of the frame section 74. The cheek rests 76 can be placed against the cheeks of the subject S of the model Mc whose chin is placed on the chin rest section 73, and prevent the face (head) of the subject S from moving unexpectedly. In particular, the cheek rests 76 can be used together with the forehead rest 75 to more appropriately prevent the subject S from moving. In addition, since both cheek rests 76 are provided continuously with the chin rest 73, even if the subject S is too large to rest his / her forehead on the forehead rest 75, there is a high possibility that both cheeks can be placed on the forehead rest 75, so that the chin rest attachment 70A can flexibly accommodate various subjects S. In addition, the chin rest attachment 70A can flexibly accommodate various subjects S by configuring the both cheek rests 76 to be detachable.

[0059] In the first embodiment, the chin rest attachment 70 is capable of fixing the chin rest paper to the chin rest section 73 by using both paper mounting pins 73b and both pin holes 73a. However, the chin rest section 73 does not have to be provided with a structure for fixing the chin rest paper, and is not limited to the structure of the first embodiment. [Explanation of symbols]

[0060] A Ophthalmic device 30 Chin rest 30b Chin rest 30c Chin rest paper mounting pin (as an example of a mounting pin) 50 Measurement optical system (as an example of an acquisition optical system) 70, 70A Chin rest attachment 71 Mounting portion 71a Mounting hole 73 Chin rest portion 75 Forehead rest 76 Cheek rest E Subject's eye S Subject

Claims

1. an acquisition optical system for acquiring ocular information of a subject's eye; a chin rest that supports the chin of the subject so as to be movable in a vertical direction relative to the acquisition optical system; a chin rest attachment that can be attached to the chin rest portion and on which the subject's chin can be placed, The ophthalmologic apparatus according to claim 1, wherein the chin rest attachment is moved up and down together with the chin rest portion when the chin rest portion is moved.

2. The chin rest portion has a chin rest on which the chin of the subject is placed and a pair of mounting pins provided thereon, The chin rest attachment has a chin rest portion on which the chin of the subject is placed and a mounting portion that can be fitted to the chin rest, 2. The ophthalmic apparatus according to claim 1, wherein the mounting portion is provided with a pair of mounting holes through which the mounting pins can pass.

3. 3. The ophthalmologic apparatus according to claim 2, wherein the chin rest attachment has a forehead rest portion that can be placed against the forehead of the subject on which the chin of the chin rest portion is placed.

4. 4. The ophthalmologic apparatus according to claim 3, wherein the forehead rest is detachable.

5. 3. The ophthalmologic apparatus according to claim 2, wherein the chin rest attachment has a pair of cheek rests that can be placed against both cheeks of the subject on which the chin of the chin rest portion is placed.

6. 6. The ophthalmologic apparatus according to claim 5, wherein the pair of cheek rests are detachable.

7. A chin rest attachment that can be attached to a chin rest of an ophthalmic apparatus including an acquisition optical system for acquiring ocular information of a subject's eye to be examined, and a chin rest that supports the subject's chin so as to be movable up and down relative to the acquisition optical system, A chin rest part on which the chin of the subject is placed, and an attachment part on the chin rest part that can be fitted to the chin rest on which the chin of the subject is placed, A chin rest attachment, characterized in that the mounting portion is provided with a pair of mounting holes through which a pair of mounting pins provided on the chin rest can be passed.

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