Ophthalmic devices

Abstract

To provide an ophthalmologic apparatus capable of causing an operator to objectively grasp positional relationships between an eye to be examined and an acquisition optical system, and improving operability when the operator changes the position and direction of the acquisition optical system.SOLUTION: An ophthalmologic apparatus includes: an acquisition optical system 20 for acquiring eye information on an eye E to be examined; a position changing mechanism 15 and an angle changing mechanism 17 for changing the position and direction of the acquisition optical system 20 with respect to the eye E to be examined by transmitting operation force of an examiner to the acquisition optical system 20; a display 25 that can be visually recognized by the examiner; a trestle position sensor 33 for detecting the position of the acquisition optical system 20; a swinging sensor 34 and an elevation sensor 35 for detecting a rotation angle of the acquisition optical system 20; and a control part 30 for calculating positional relationships between the eye E to be examined and the acquisition optical system 20 on the basis of the position or the rotation angle of the acquisition optical system 20 detected by the trestle position sensor 33, etc. and displaying positional relationship information J indicating the positional relationships on the display 25.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to an ophthalmic device. [Background technology]

[0002] Conventionally, there has been known an ophthalmic apparatus equipped with an acquisition optical system for acquiring ocular information of a subject's eye. In the conventional ophthalmic apparatus, an operator such as an examiner touches an observation image of the subject's eye displayed on a display having a touch panel function, and the acquisition optical system is moved based on the touch operation (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6815722 Summary of the Invention [Problem to be solved by the invention]

[0004] In conventional ophthalmic devices, the positional relationship between the subject's eye and the acquisition optical system must be estimated based on an observation image of the subject's eye displayed on a display. In other words, when moving the acquisition optical system, the operator must move the acquisition optical system based on the subjective positional relationship estimated from the observation image. Therefore, if the positional relationship between the subject's eye and the acquisition optical system estimated by the operator differs from the actual positional relationship, the acquisition optical system cannot be moved to the desired position. In other words, in conventional ophthalmic devices, the operator cannot objectively grasp the positional relationship between the subject's eye and the acquisition optical system, resulting in a problem of poor operability when the operator controls the position and orientation of the acquisition optical system.

[0005] The present invention has been made in light of the above-mentioned problems, and aims to provide an ophthalmic device that allows the operator to objectively grasp the positional relationship between the test eye and the acquisition optical system, thereby improving operability when the operator controls the position and orientation of the acquisition optical system. [Means for solving the problem]

[0006] In order to achieve the above object, an ophthalmologic apparatus of the present invention includes an acquisition optical system that acquires ocular information of a subject's eye, an optical system changing mechanism that changes at least one of a position or an orientation of the acquisition optical system with respect to the subject's eye by transmitting an operating force of an operator to the acquisition optical system, a display that is visible to the operator, a sensor that detects a position or a rotation angle of the acquisition optical system, and a control unit that calculates a positional relationship between the subject's eye and the acquisition optical system based on the position or the rotation angle of the acquisition optical system detected by the sensor and causes positional relationship information indicating the positional relationship to be displayed on the display. The positional relationship information is displayed by a first graphic image showing a first icon representing the subject's eye and a second icon representing the acquisition optical system in isometric projection. do. [Effects of the Invention]

[0007] Therefore, the ophthalmic device of the present invention allows the operator to objectively understand the positional relationship between the test eye and the acquisition optical system, improving operability when the operator controls the position and orientation of the acquisition optical system relative to the test eye. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is an overall schematic diagram showing the configuration of an ophthalmologic apparatus according to a first embodiment. [Figure 2] FIG. 2 is a block diagram showing a control configuration of the ophthalmologic apparatus according to the first embodiment. [Figure 3] FIG. 2 is an explanatory diagram showing a display example of the display of the ophthalmologic apparatus of the first embodiment. [Figure 4] FIG. 3 is an explanatory diagram showing positional relationship information displayed on the ophthalmologic apparatus of the first embodiment. [Figure 5A] 1A is a first explanatory diagram in which the display of positional relationship information is changed according to the actual orientation of the acquisition optical system, and FIG. 1B is a second explanatory diagram in which the display of positional relationship information is changed according to the actual position of the acquisition optical system. [Figure 5B] FIG. 10C is a third explanatory diagram in which the display of the positional relationship information is changed according to the actual position of the acquisition optical system. [Figure 6] 10A and 10B are explanatory diagrams showing modified examples of a light beam image and an optical axis image displayed as positional relationship information. [Figure 7] FIG. 10 is an explanatory diagram showing a display example of the display of the ophthalmologic apparatus of the second embodiment. [Figure 8] FIG. 10 is an explanatory diagram showing a modified example of positional relationship information displayed on the ophthalmologic apparatus of the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] An embodiment of the ophthalmologic apparatus of the present invention will be described based on Examples 1 and 2 shown in the drawings. In the following description, when viewed from the side facing the subject (examiner side), the left-right direction is indicated by arrow X, the up-down direction (vertical direction) is indicated by arrow Y, and the direction perpendicular to the left-right and up-down directions is indicated as the front-back direction by arrow Z. In the left-right direction (X-axis direction), the left side of the examiner is the left direction, and the right side of the examiner is the right direction. Furthermore, in the front-back direction (Z-axis direction), the examiner side is the front side, and the subject side is the rear side.

[0010] Example 1 The configuration of an ophthalmologic apparatus 10 according to the first embodiment will be described below with reference to FIGS.

[0011] The ophthalmologic apparatus 10 of the first embodiment is a fundus camera, and includes an acquisition optical system 20 for acquiring a fundus image as ocular information of the subject's eye E.

[0012] 1, the ophthalmologic apparatus 10 includes a base 11, a stand 12, a main body 13, and a support 14. The acquisition optical system 20 is housed in the main body 13.

[0013] The gantry 12 is installed on the base 11 and is supported by the base 11 via a position change mechanism 15. The position change mechanism 15 is a known manual movement mechanism that moves the gantry 12 in the left-right direction (X-axis direction), the front-back direction (Z-axis direction), and the up-down direction (Y-axis direction). That is, the position change mechanism 15 moves the gantry 12 by transmitting an operating force from an examiner, who is an operator, to the gantry 12. In other words, the position change mechanism 15 moves the gantry 12 by receiving the operating force in accordance with the movement operation by the examiner. The position change mechanism 15 may be, for example, a rack and pinion or a slide rail having an outer member and an inner member that slide relative to each other. The examiner moves the gantry 12 and changes its position by directly pushing or pulling the gantry 12 in the desired direction among the left-right direction, the front-back direction, and the up-down direction. An operating lever or the like may be attached to the gantry 12, and the examiner may use the lever or the like to move the gantry 12.

[0014] The mount 12 is also provided with a photographing lever 16, which is an operation unit 26 described later, and an operation button 16a is disposed at the tip of the photographing lever 16. When the examiner presses the operation button 16a, the control unit 30 outputs a control command to the acquisition optical system 20 to capture an image of the fundus of the subject's eye E.

[0015] The main body 13 is placed on the stand 12 and is supported by the stand 12 via an angle changing mechanism 17. The main body 13 houses an acquisition optical system 20 and a control unit 30 (see FIG. 2). The main body 13 also includes an objective lens unit 21 and an eyepiece lens unit 22. A still camera 23 and an imaging device 24 are also removably connected to the main body 13.

[0016] The angle change mechanism 17 is a known manual movement mechanism that rotates the main body 13 left and right and up and down. The angle change mechanism 17 has a swing mechanism 18 and a tilt mechanism 19.

[0017] The oscillating mechanism 18 transmits an operating force from the examiner, who is the operator, to the main body 13, thereby rotating the main body 13 in the left-right direction (X-axis direction) around a preset rotation axis 18a (reference axis). In other words, the oscillating mechanism 18 receives the operating force and rotates the main body 13 in accordance with the rotation operation by the examiner. The oscillating mechanism 18 can use, for example, a curved rail that is curved in an arc and supports the main body 13, and a guide member that is attached to the main body 13 and can move along the curved rail. The examiner rotates the main body 13 by directly pushing or pulling the main body 13 itself in the left-right direction.

[0018] Here, the rotation axis 18a is set as a straight line extending in the up-down direction (Y-axis direction) and passing through a predetermined position set behind the acquisition optical system 20 in the front-to-back direction (Z-axis direction). The acquisition optical system 20 is aligned so that the rotation axis 18a coincides with the center position of the pupil of the subject's eye E. In the state shown in FIG. 1, the center position of the pupil of the subject's eye E coincides with the rotation axis 18a.

[0019] The tilt mechanism 19 transmits an operating force from the examiner, who is the operator, to the main body 13, thereby rotating the main body 13 in the vertical direction (Y-axis direction) around a preset central axis 19a (reference line). In other words, the tilt mechanism 19 receives the operating force and rotates the main body 13 in accordance with the rotation operation by the examiner. The tilt mechanism 19 can use, for example, a curved arm that stands up from the base 12 and is curved in an arc, and a guide member that can move along the curved arm. The examiner rotates the main body 13 by directly tilting the main body 13 in the vertical direction. An operating lever or the like may be attached to the main body 13, and the main body 13 may be rotated using the lever or the like.

[0020] Furthermore, the central axis 19a passes through the position where the rotation axis 18a and the optical axis O of the acquisition optical system 20 intersect, and is set as a straight line extending in the left-right direction (X-axis direction).

[0021] In the ophthalmologic apparatus 10 of Example 1, the examiner manually operates (pushes and pulls) the position change mechanism 15 to move the pedestal 12 in each of the left-right, front-back, and up-down directions, and the main body 13 installed on the pedestal 12 in each of the left-right, front-back, and up-down directions, and the angle change mechanism 17 to rotate the main body 13 installed on the pedestal 12 in each of the left-right, front-back, and up-down directions. That is, the position of the acquisition optical system 20 housed in the main body 13 is manually changed together with the pedestal 12 via the position change mechanism 15, and the angle of rotation (orientation) of the acquisition optical system 20 together with the main body 13 in the left-right and up-down directions is manually changed by the angle change mechanism 17. Therefore, the position change mechanism 15 and the angle change mechanism 17 correspond to an optical system change mechanism that changes the position and orientation of the acquisition optical system 20 with respect to the subject's eye E by transmitting the examiner's operating force to the acquisition optical system 20.

[0022] The support pillar 14 stands upright from the base 11 and extends in the vertical direction. The support pillar 14 is provided with a chin rest 14a, a forehead rest 14b, and an external fixation light 14c. The chin rest 14a and the forehead rest 14b fix the position of the subject's (patient's) face, i.e., the subject's eye E, relative to the main body 13 (acquisition optical system 20) when acquiring ocular information about the subject's eye E. The chin rest 14a is where the subject places their chin, and the forehead rest 14b is where the subject places their forehead. The chin rest 14a and the forehead rest 14b are each movable in the vertical direction relative to the base 11. The external fixation light 14c is a light source that causes the subject's eye E to fixate (fix its line of sight). In the ophthalmologic device 10 of Example 1, the subject places his / her chin on the chin rest portion 14a and his / her forehead on the forehead rest portion 14b, and while facing the main body portion 13, the external fixation light 14c is turned on as appropriate, and the subject's eye E is examined, observed, photographed, etc.

[0023] The acquisition optical system 20 housed in the main body 13 is an optical system that acquires ocular information (fundus image) of the subject's eye E. The acquisition optical system 20 includes an illumination optical system that illuminates the fundus Ef, an imaging optical system that observes and images the illuminated fundus Ef, an objective lens, an eyepiece lens, and the like.

[0024] The illumination optical system forms a ring-shaped light-transmitting portion image of the observation illumination light on the pupil of the subject's eye E during fundus observation in order to use a fundus reflection image from the subject's eye E. Furthermore, the illumination optical system flashes the xenon lamp to illuminate the fundus Ef during fundus photography. In the case of fluorescence photography, the illumination optical system can switch the exciter filter depending on whether FAG photography or ICG photography is being performed. Furthermore, in the case of color photography, the illumination optical system retracts the exciter filter from the optical path.

[0025] The photographing optical system guides the reflected light from the subject's eye E illuminated by the illumination optical system to the photographing medium of the still camera 23 or the image pickup element of the imaging device 24, enabling observation and photography of the fundus oculi Ef.

[0026] The objective lens unit 21 is composed of an objective lens (not shown) of the acquisition optical system 20 housed in a lens barrel. The objective lens unit 21 is disposed at a position facing the subject's eye E. The eyepiece lens unit 22 is composed of an eyepiece (not shown) of the acquisition optical system 20 housed in a lens barrel. The eyepiece lens unit 22 is where the examiner observes the subject's eye E.

[0027] The still camera 23 captures a still image of the fundus Ef of the subject's eye E via the acquisition optical system 20. The still camera 23 may be a digital camera equipped with a CCD (Charge Coupled Device), a film camera, an instant camera, or the like, depending on the purpose of the examination, etc. The imaging device 24 captures moving images of the fundus Ef of the subject's eye E via the acquisition optical system 20. The imaging device 24 may be a television camera, etc. If a digital imaging system is used as the still camera 23 or imaging device 24, the acquired image data can be stored in a recording medium in the ophthalmic apparatus 10 or in an external image recording device such as a computer.

[0028] Furthermore, the main body 13 is provided with a display 25. The display 25 is disposed in a position facing the examiner while acquiring eye information. The display 25 is a display device that can be viewed by the examiner, who is the operator who controls the position and orientation of the stand 12 and the main body 13. The display 25 is configured as a liquid crystal display device having a touch panel function on the display screen 25a (see FIG. 3).

[0029] Under the control of the control unit 30, the display screen 25a of the display 25 appropriately displays an image of the fundus oculi Ef of the subject's eye E based on image data from the acquisition optical system 20, software keys serving as the operation unit 26, etc. In addition, the display screen 25a displays positional relationship information J, which will be described later.

[0030] The operation unit 26 is used by the examiner or subject to operate the operations and settings of the chin rest 14a, the forehead rest 14b, the acquisition optical system 20, etc. When operated by the examiner or the like, the operation unit 26 outputs a predetermined operation signal according to the operation to the control unit 30. The control unit 30 outputs a predetermined control command to the chin rest 14a, the forehead rest 14b, the acquisition optical system 20, etc. based on the operation signal from the operation unit 26. As a result, the operations and settings of the chin rest 14a, etc. are operated.

[0031] The operation unit 26 is composed of the shooting lever 16, an operation button 16a provided at the tip of the shooting lever 16, software keys displayed on the display 25, etc. The software keys enable various operations such as alignment of the acquisition optical system 20, setting of various inspection conditions, and adjustment of the display content of the display 25. The operation unit 26 may also have various buttons provided around the shooting lever 16 and the display 25. The operation unit 26 may also be composed of an input device such as a keyboard or a mouse.

[0032] 2, the control unit 30 loads a program stored in the storage unit 31 or the built-in internal memory 32 onto, for example, a RAM (Random Access Memory), thereby comprehensively controlling the operation of the ophthalmologic apparatus 10 in response to operations on the operation unit 26. In the first embodiment, the internal memory 32 is configured with a RAM or the like, and the storage unit 31 is configured with a ROM (Read Only Memory), an EEPROM (Electrically Erasable Programmable ROM), or the like.

[0033] In addition to the above-described configuration, the ophthalmologic apparatus 10 may be provided with a printer that prints out the measurement results in response to a measurement completion signal or an instruction from the examiner, etc., an output unit that outputs the measurement results to an external memory or a server, etc., and an audio output unit that notifies the status of operation, etc. The control unit 30 may be provided inside the base 11 or the stand 12, etc.

[0034] Furthermore, the control unit 30 is connected to the acquisition optical system 20 via a cable (not shown) inside the main body 13. The control unit 30 controls and drives (including moves) the light source of the illumination optical system and the operating unit of the photographing optical system in the acquisition optical system 20. Furthermore, the control unit 30 is connected to a display 25, an operation unit 26 including the photographing lever 16 (operation button 16a) and software keys, a memory unit 31, a platform position sensor 33, a swing sensor 34, a tilt sensor 35, and a distance sensor 36 via cables (not shown) inside the main body 13. The control unit 30 outputs a predetermined control command to the display 25 in response to an operation signal from the operation unit 26 to control it. Furthermore, in the ophthalmologic apparatus 10, power is supplied to the control unit 30 from a commercial power source, and the control unit 30 supplies power to each of the above-mentioned connected units.

[0035] The gantry position sensor 33 is a sensor that detects the left-right and front-back positions of the gantry 12 (acquisition optical system 20) on the base 11, and the up-down position of the gantry 12 (acquisition optical system 20) relative to the base 11. The gantry position sensor 33 outputs the detected position information of the gantry 12 to the control unit 30. The gantry position sensor 33 of the first embodiment has a fixed sensor attached to the base 11 and a moving sensor attached to the gantry 12 that moves together with the gantry 12, and detects the positions of the gantry 12 relative to the base 11 in each of the left-right, front-back, and up-down directions based on the distance between the two sensors. The gantry position sensor 33 may be a contact sensor or a non-contact sensor.

[0036] The swing sensor 34 is a sensor that detects the left-right rotation angle of the main body 13 (acquisition optical system 20). The swing sensor 34 outputs the detected angle information of the main body 13 to the control unit 30. The swing sensor 34 of Example 1 has a fixed sensor on the side of the base 12 that supports the main body 13, and a moving sensor on the side of the main body 13 that moves together with the main body 13, and detects the left-right rotation angle of the main body 13 based on the distance between the two sensors. The swing sensor 34 may be a contact type sensor or a non-contact type sensor.

[0037] The tilt sensor 35 is a sensor that detects the vertical rotation angle of the main body 13 (acquisition optical system 20). The tilt sensor 35 outputs detected angle information of the main body 13 to the control unit 30. The tilt sensor 35 of Example 1 has a fixed sensor on the side of the base 12 that supports the main body 13 and a moving sensor on the main body 13 that moves together with the main body 13, and detects the vertical rotation angle of the main body 13 based on the distance between the two sensors. The tilt sensor 35 may be a contact type sensor or a non-contact type sensor.

[0038] The distance sensor 36 is a sensor that detects the distance from the main body 13 (acquisition optical system 20) to the subject's eye E, i.e., the distance between them. The distance sensor 36 outputs the detected distance information to the control unit 30. The distance sensor 36 of Example 1 detects the linear distance from the objective lens unit 21, which is the part of the main body 13 that protrudes most toward the subject, to the subject's eye E. The distance sensor 36 is provided, for example, on the surface of the main body 13 that faces the subject. The distance sensor 36 of Example 1 includes a light source such as an LED or an LD and a light receiving element therein, receives light irradiated from the light source and reflected from a measurement target (e.g., the subject's face) with the light receiving element, converts it into a distance, and outputs it. Note that the distance sensor 36 is not limited to the configuration of Example 1, and may be, for example, a sensor using ultrasound or infrared rays, a stereo camera, or a distance sensor with another configuration, as long as it detects the distance (distance) from the main body 13 to the subject's eye E.

[0039] The display on the display 25 controlled by the control unit 30 of the first embodiment will be described below.

[0040] In the ophthalmologic apparatus 10 of the first embodiment, as shown in FIG. 3 , a first display area 27a and a second display area 27b are set by the control unit 30 on the display screen 25a of the display 25. Here, the control unit 30 displays an image F of the fundus oculi Ef of the subject's eye E acquired by the acquisition optical system 20 in the first display area 27a. The control unit 30 also displays positional relationship information J indicating the positional relationship between the subject's eye E and the acquisition optical system 20 in the second display area 27b. The sizes and arrangements of the first display area 27a and the second display area 27b can be set arbitrarily. For example, the control unit 30 may set the second display area 27b to cover the entire surface of the display screen 25a. The control unit 30 may also display any image, information, software key, etc. other than the image F in the first display area 27a. The control unit 30 may also display any image, information, software key, etc. in areas other than the first display area 27a and the second display area 27b.

[0041] The "positional relationship information J" is information that objectively represents the actual position of the acquisition optical system 20 relative to the actual position of the subject's eye E. The positional relationship information J is calculated by the control unit 30 based on the horizontal distance from the subject's eye E to the acquisition optical system 20, the front-to-back distance from the subject's eye E to the acquisition optical system 20, the vertical distance from the subject's eye E to the acquisition optical system 20, the horizontal rotation angle of the acquisition optical system 20 about the rotation axis 18a, and the vertical rotation angle of the acquisition optical system 20 about the central axis 19a. The control unit 30 obtains the distance information and rotation angle information required for calculating the positional relationship information J from the detection results of the gantry position sensor 33, the swing sensor 34, the tilt sensor 35, and the distance sensor 36.

[0042] In the first embodiment, the positional relationship information J is displayed by a first graphic image 41 shown in Fig. 4. The first graphic image 41 has a first icon 41A showing an eyeball model representing the subject's eye E, and a second icon 41B showing an apparatus model representing the ophthalmic apparatus 10 including the acquisition optical system 20.

[0043] The first icon 41A and the second icon 41B are displayed using isometric projection. Here, "isometric projection" is a projection method for drawing a tilted three-dimensional object such that the angles formed in the three directions (front / back, left / right, and up / down) are equal to each other (120 degrees). Therefore, the first graphic image 41 displayed using isometric projection is basically a perspective view of the subject's eye E and the ophthalmic device 10 viewed obliquely from above.

[0044] In the first embodiment, the first icon 41A is displayed as an isometric eyeball model image that schematically shows the hollow interior of the subject's eye E, with the outer shell of the subject's eye E divided in the left-right direction. In FIG. 4, the symbol α is assigned to a portion corresponding to the crystalline lens of the subject's eye E, and the symbol β is assigned to a portion corresponding to the fundus Ef of the subject's eye E. The first icon 41A is not limited to the one shown in FIG. 4, and may be, for example, an eyeball model image that schematically shows any part of the subject's eye E (for example, only the anterior segment, only the crystalline lens, etc.). The first icon 41A may be an eyeball model image that displays the outer shell of the subject's eye E semi-transparently and schematically shows the entire internal structure, or the left half or right half, or an eyeball model image that cuts apart a part of the subject's eye E (for example, the upper quarter) to schematically show the internal structure. In the examples shown in FIGS. 3 and 4, the blood vessel image of the left half of the subject's eye E is displayed superimposed on the eyeball model, but the blood vessel image does not have to be displayed.

[0045] On the other hand, the second icon 41B is displayed as an apparatus model image shown in isometric projection, which schematically illustrates the ophthalmic apparatus 10 including the acquisition optical system 20, the position change mechanism 15, the photographing lever 16, the oscillating mechanism 18 of the angle change mechanism 17, and the tilt mechanism 19. In FIG. 4 , in the second icon 41B, the portion representing the acquisition optical system 20 is denoted by reference numeral 101, the portion representing the position change mechanism 15 is denoted by reference numeral 102, the portion representing the photographing lever 16 is denoted by reference numeral 103, the portion representing the oscillating mechanism 18 is denoted by reference numeral 104, and the portion representing the tilt mechanism 19 is denoted by reference numeral 105. Furthermore, the apparatus model image displayed as the second icon 41B may be shaped differently from the actual ophthalmic apparatus 10, or may be partially enlarged, reduced, or deformed, so that the examiner can easily grasp the positional relationship information J. In the example shown in FIG. 4 , the acquisition optical system 20 is schematically illustrated in a reduced scale to improve visibility.

[0046] The scale of the second icon 41B relative to the first icon 41A may be displayed at the same magnification, or may be enlarged or reduced at any magnification other than the same magnification. In the example shown in Fig. 4, the second icon 41B is displayed at a reduced scale relative to the first icon 41A, so that the first icon 41A representing the subject's eye E is displayed at a relatively enlarged scale, and the second icon 41B representing the ophthalmic apparatus 10 is displayed at a relatively reduced scale. Displaying the second icon 41B at a non-realistic scale relative to the first icon 41A makes it easier for the examiner to grasp the positional relationship information J.

[0047] Furthermore, the control unit 30 may superimpose and display an image showing the current opacity distribution state of the crystalline lens (hereinafter referred to as a "crystalline lens opacity distribution image") on the portion α of the first icon 41A corresponding to the crystalline lens of the subject's eye E. The crystalline lens opacity distribution is detected using a known device (for example, a Shack-Hartmann sensor, see Japanese Patent No. 6775337, etc.). Furthermore, the position of the crystalline lens opacity is identified by a known identification method (for example, a method using optical coherence tomography (OCT) scan, see Japanese Patent Application Laid-Open No. 2019-170710, etc.).

[0048] Furthermore, the control unit 30 may superimpose and display an image showing the current state of the retina (hereinafter referred to as a "retinal image") on a portion β of the first icon 41A that corresponds to the fundus oculi Ef of the subject's eye E. The retinal image is combined with the first icon 41A, which is an eyeball model image, based on known technology (see, for example, Japanese Patent Application Laid-Open No. 2020-156622, etc.).

[0049] The lens opacity distribution image and the retina image may be displayed in any area within the second display area 27b that does not overlap with the first icon 41A (so-called lantern display or balloon display).

[0050] Furthermore, as positional relationship information J, the control unit 30 displays a light beam image γ showing the light beam between the test eye E and the acquisition optical system 20 and an optical axis image δ showing the optical axis O directed from the acquisition optical system 20 to the test eye E, superimposed on the first graphic image 41, as shown in Figure 4.

[0051] Here, the light flux image γ shows how light travels between the subject's eye E and the acquisition optical system 20. The optical axis image δ shows the direction of light output from the acquisition optical system 20. Generally, a fundus camera uses a ring illumination to remove reflections from the cornea and crystalline lens of the subject's eye E. Therefore, the light flux of the imaging light passes through the center of the pupil of the subject's eye E, but the light flux of the illumination light does not pass through the center of the pupil. The light flux image γ superimposed on the first graphic image 41 may show the light flux of the illumination light or the light flux of the imaging light.

[0052] Furthermore, the control unit 30 can display the first graphic image 41 by rotating it around a predetermined position set within the second display area 27b. To rotate the first graphic image 41, the examiner may touch the first graphic image 41 or may touch a software key (not shown) displayed at an arbitrary position on the display screen 25a. The software key for rotating the first graphic image 41 may be displayed superimposed on the first graphic image 41.

[0053] By rotating and displaying the first graphic image 41, the viewing direction of the first graphic image 41 can be changed to a desired direction while maintaining the positional relationship between the subject's eye E and the acquisition optical system 20. This allows the examiner to view the positional relationship between the subject's eye E and the acquisition optical system 20 from a desired angle.

[0054] Furthermore, when the main body 13 is rotated left / right or up / down, the control unit 30 of Example 1 changes the display of the second icon 41B of the first graphic image 41 to follow the change in the actual rotation angle of the main body 13, as shown in Fig. 5A(a). Furthermore, when the position of the pedestal 12 is changed, the control unit 30 changes the display of the second icon 41B of the first graphic image 41 to follow the change in the actual position of the pedestal 12, as shown in Fig. 5A(b) or Fig. 5B(c). This allows the ophthalmologic apparatus 10 of Example 1 to display the positional relationship between the subject's eye E and the acquisition optical system 20 in real time.

[0055] 5A(a) to 5B(c), the control unit 30 may display a vertical line (rotation reference line) L1 passing through the rotation point G of the eyeball and a rotation axis 18a serving as the rotation center of the oscillating mechanism 18 superimposed on the first graphic image 41. In this case, the examiner can easily recognize the degree and direction of the positional deviation between the subject's eye E and the acquisition optical system 20 based on the deviation between the vertical line L1 and the rotation axis 18a.

[0056] The operation of the ophthalmologic apparatus 10 of the first embodiment will be described below.

[0057] The ophthalmologic apparatus 10 of Example 1 includes an acquisition optical system 20, a position change mechanism 15, an angle change mechanism 17, a display 25, a stand position sensor 33, a swing sensor 34, an elevation sensor 35, a distance sensor 36, and a control unit 30.

[0058] Here, the acquisition optical system 20 acquires ocular information of the subject's eye E. The position change mechanism 15 transmits an operating force by the examiner (operator) to the gantry 12 to change the position of the acquisition optical system 20 in the left-right, front-back, and up-down directions. The angle change mechanism 17 transmits an operating force by the examiner (operator) to the main body 13 to change the rotation angle (orientation) of the acquisition optical system 20 in the left-right and up-down directions. The display 25 has a display screen 25a that can be viewed by the examiner (operator). The gantry position sensor 33 detects the left-right and front-back positions of the gantry 12 (acquisition optical system 20) on the base 11, as well as the up-down position of the gantry 12 relative to the base 11. The swing sensor 34 detects the left-right rotation angle of the main body 13 (acquisition optical system 20). The tilt sensor 35 detects the up-down rotation angle of the main body 13 (acquisition optical system 20). The distance sensor 36 detects the distance from the main body 13 (the acquisition optical system 20) to the eye E to be examined.

[0059] Then, the control unit 30 calculates positional relationship information J indicating the positional relationship between the test eye E and the acquisition optical system 20 based on the detection results of the mount position sensor 33, the head swing sensor 34, the tilt sensor 35, and the distance sensor 36, and displays the calculated positional relationship information J on the display screen 25a of the display 25.

[0060] Therefore, in the ophthalmologic apparatus 10 of Example 1, the positional relationship information J displayed on the display 25 allows the examiner, who is the operator, to objectively grasp the positional relationship between the subject's eye E and the acquisition optical system 20. Then, by objectively grasping the positional relationship between the subject's eye E and the acquisition optical system 20, the examiner can accurately recognize the positional relationship between the subject's eye E and the acquisition optical system 20. Then, it is possible to improve operability when the examiner changes the position and rotation angle (orientation) of the acquisition optical system 20 by pushing or pulling the pedestal 12 or the main body 13.

[0061] In addition, in the ophthalmic device 10 of Example 1, the control unit 30 displays the positional relationship information J using a first graphic image 41 that shows, using isometric projection, a first icon 41A representing an eyeball model showing the subject's eye E and a second icon 41B representing an apparatus model showing the ophthalmic device 10 including the acquisition optical system 20.

[0062] As a result, the ophthalmic apparatus 10 of the first embodiment allows the examiner to grasp the positional relationship between the subject's eye E and the ophthalmic apparatus 10 including the acquisition optical system 20 when viewed from above. This allows the examiner to easily recognize the outline of the positional relationship between the subject's eye E and the acquisition optical system 20.

[0063] Furthermore, in the ophthalmologic apparatus 10 of Example 1, the control unit 30 displays a light flux image γ indicating the light flux between the subject's eye E and the acquisition optical system 20 on the display 25 as the positional relationship information J. Therefore, the ophthalmologic apparatus 10 of Example 1 allows the examiner to objectively grasp the progress of light between the subject's eye E and the acquisition optical system 20. This allows the examiner to objectively recognize the light flux between the subject's eye E and the acquisition optical system 20 and then change the position and rotation angle of the acquisition optical system 20, thereby improving operation accuracy.

[0064] Furthermore, in the ophthalmologic apparatus 10 of Example 1, the control unit 30 displays an optical axis image δ indicating the optical axis O of the acquisition optical system 20 on the display 25 as the positional relationship information J. Therefore, the ophthalmologic apparatus 10 of Example 1 allows the examiner to objectively grasp the direction of the optical axis O directed from the acquisition optical system 20 toward the subject's eye E. This allows the examiner to objectively recognize the position where the optical axis O of the acquisition optical system 20 passes on the subject's eye E, and then change the position and rotation angle of the acquisition optical system 20, thereby improving operation accuracy.

[0065] In particular, in Example 1, the light flux image γ and the optical axis image δ are both displayed superimposed on the first graphic image 41. This makes it easier for the examiner to understand the state of the light flux between the subject's eye E and the acquisition optical system 20 and the direction of the optical axis O from the acquisition optical system 20.

[0066] The light beam image γ and the optical axis image δ do not necessarily have to be displayed superimposed on the first graphic image 41. In other words, the ophthalmologic apparatus 10 only needs to allow the examiner to grasp the state of the light beam and the direction of the optical axis O, and therefore, for example, as shown in Fig. 6, the subject's eye E and the acquisition optical system 20 may be represented by geometric shapes such as a circle, a rectangle, a triangle, or an ellipse. In Fig. 6, the subject's eye E is represented by a circle 200, and the acquisition optical system 20 is represented by a rectangle 201. Furthermore, in Fig. 6, the part corresponding to the crystalline lens of the subject's eye E is denoted by the symbol α, and the part corresponding to the fundus Ef of the subject's eye E is denoted by the symbol β.

[0067] Furthermore, in the ophthalmologic apparatus 10 of the first embodiment, a lens opacity distribution image may be displayed superimposed on a portion α of the first icon 41A that corresponds to the lens of the subject's eye E. In this case, the examiner can objectively grasp the positional relationship between the lens opacity distribution and the light beam or the optical axis O. This allows the examiner to change the position and orientation of the acquisition optical system 20 so that a fundus image can be acquired while avoiding the opacified region of the lens of the subject's eye E.

[0068] Furthermore, in the ophthalmologic apparatus 10 of the first embodiment, a retinal image may be displayed superimposed on a portion β of the first icon 41A that corresponds to the fundus Ef of the subject's eye E. In this case, the examiner can objectively grasp the state of the retina of the fundus Ef and the positional relationship between the light beam and the optical axis O and the retina of the fundus Ef. This allows the examiner to accurately observe and photograph a desired position of the fundus Ef of the subject's eye E in accordance with the state of the retina, and to appropriately acquire desired eye information (fundus image).

[0069] The image superimposed on the first graphic image 41 may be something other than a lens opacity distribution image or a retinal image. For example, a transillumination image or a B-scan line image of an OCT image may be used as the image superimposed on the portion α corresponding to the lens. Furthermore, an image of the retina photographed by an infrared camera, a retinal scan image by OCT, or a retinal projection image by OCT may be used as the image superimposed on the portion β corresponding to the fundus Ef. When a B-scan image of an OCT image is used as the retinal image, the situation of the target image can be grasped in real time.

[0070] In the ophthalmologic apparatus 10 of Example 1, the display 25 is provided in the main body 13 accommodating the acquisition optical system 20. That is, the display 25 is disposed in an environment where the examiner can directly confirm the positional relationship between the subject's eye E and the acquisition optical system 20. This allows the examiner, who visually recognizes the positional relationship information J displayed on the display 25, to operate the position changing mechanism 15 and the angle changing mechanism 17 while directly comparing the displayed positional relationship information J with the actual positional relationship between the subject's eye E and the acquisition optical system 20. This allows for more accurate operation.

[0071] Furthermore, in the ophthalmologic apparatus 10 of Example 1, the control unit 30, the display 25, and various sensors (the gantry position sensor 33, the swing sensor 34, the tilt sensor 35, and the distance sensor 36) are connected via cables (not shown) inside the main body 13. This allows for faster transmission and reception of various signals and more stable transmission and reception of signals compared to when the control unit 30 and the like are connected via a wireless communication network such as wide-area wireless communication or short-range wireless communication.

[0072] Example 2 Although the ophthalmic apparatus 10 of the first embodiment has shown an example in which the positional relationship information J is displayed by the first graphic image 41, it may be displayed by other means. That is, the ophthalmic apparatus 10 of the second embodiment displays the positional relationship information J by the second graphic image 44, as shown in Fig. 7. Note that the configuration of the ophthalmic apparatus 10 of the second embodiment is similar to that of the ophthalmic apparatus 10 of the first embodiment, and therefore a description thereof will be omitted.

[0073] The second graphic image 44 is an image that shows, using third angle projection, a third icon 44C that shows an eyeball model representing the subject's eye E and a fourth icon 44D that shows an apparatus model representing the ophthalmic apparatus 10 including the acquisition optical system 20. Here, the "third angle projection" is a projection method that depicts a three-dimensional object placed at the third angle using a front view projected onto a vertical plane in front, a top view projected onto a horizontal plane above, and a left side view projected onto a vertical plane on the left.

[0074] That is, the third icon 44C is composed of a plan view, a right side view, and a front view of an eyeball model that schematically shows the test eye E, with the outer shell of the test eye E divided laterally and the interior hollow. The fourth icon 44D is composed of a plan view, a right side view, and a front view of an apparatus model that schematically shows the ophthalmic apparatus 10, which includes the acquisition optical system 20, the position change mechanism 15, the photographing lever 16, and the oscillating mechanism 18 and the elevation mechanism 19 of the angle change mechanism 17. Therefore, the second graphic image 44 displayed by the third angle projection method includes a plan view of the test eye E and the ophthalmic apparatus 10 viewed from above, a right side view viewed from the right side, and a front view viewed from the examiner's side. In Figure 7, in the fourth icon 44D, the part indicating the acquisition optical system 20 is given the symbol 101, the part indicating the position change mechanism 15 is given the symbol 102, the part indicating the shooting lever 16 is given the symbol 103, the part indicating the swivel mechanism 18 is given the symbol 104, and the part indicating the tilt mechanism 19 is given the symbol 105.

[0075] In this way, the ophthalmologic apparatus 10 of Example 2 displays the positional relationship information J using the second graphic image 44 that shows the third icon 44C and the fourth icon 44D using third-angle projection. This allows the examiner viewing the display 25 to grasp in detail the positional relationship between the subject's eye E and the acquisition optical system 20, such as the distance from the acquisition optical system 20 to the subject's eye E and the rotation angle of the acquisition optical system 20.

[0076] 7, the eyeball model representing the subject's eye E and the device model representing the ophthalmic device 10 are both displayed in three views: a front view, a plan view, and a side view. However, they do not necessarily have to be displayed in all three views. The third icon 44C and the fourth icon 44D of the second graphic image 44 are images showing the eyeball model and the device model in third-angle perspective, but they may be displayed in one or more of a front view, a plan view, a left side view, and a right side view. That is, the second graphic image 44 may be composed of, for example, only the third icon 44C showing the eyeball model representing the subject's eye E in plan view and the fourth icon 44D showing the device model representing the ophthalmic device 10 in plan view.

[0077] The control unit 30 may also superimpose and display a lens opacity distribution image on a portion of the third icon 44C that corresponds to the lens, or may superimpose and display a retina image on a portion of the third icon 44C that corresponds to the fundus Ef. The control unit 30 may also superimpose and display a luminous flux image γ or an optical axis image δ on the second graphic image 44.

[0078] 8, the control unit 30 may display, as the positional relationship information J, a first scale image 45a and a second scale image 45b that imitate scales indicating the rotation angle of the acquisition optical system 20 with respect to the subject's eye E. Here, the first scale image 45a indicates the horizontal rotation angle of the acquisition optical system 20. Furthermore, the second scale image 45b indicates the vertical rotation angle of the acquisition optical system 20.

[0079] In the example shown in Fig. 8, the first scale image 45a and the second scale image 45b are scales that indicate the rotation angle around the pupil center position of the subject's eye E, and are set to zero degrees when the subject's eye E and the acquisition optical system 20 are facing each other (a state in which the optical axis O is perpendicular to the fundus Ef). In the example shown in Fig. 9, the first scale image 45a and the second scale image 45b are displayed overlapping the second graphic image 44. In addition, the first scale image 45a and the second scale image 45b are

[0080] 8, the control unit 30 may display, as the positional relationship information J, a first numerical image 46a and a second numerical image 46b showing numerical values ​​indicating the rotation angle of the acquisition optical system 20 with respect to the subject's eye E. Here, the first numerical image 46a indicates the rotation angle of the acquisition optical system 20 in the left-right direction. Furthermore, the second numerical image 46b indicates the rotation angle of the acquisition optical system 20 in the up-down direction.

[0081] In the example shown in FIG. 8, the first numerical image 46a and the second numerical image 46b are set to zero degrees when the subject's eye E and the acquisition optical system 20 are facing each other (the optical axis O is perpendicular to the fundus Ef).

[0082] In this way, by displaying the positional relationship information J using the first scale image 45a and the second scale image 45b, or the first numerical image 46a and the second numerical image 46b, the examiner can more accurately grasp the distance from the acquisition optical system 20 to the subject's eye E and the rotation angle of the acquisition optical system 20.

[0083] The ophthalmic device of the present invention has been described above based on Examples 1 and 2, but the specific configuration is not limited to these Examples, 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 claims.

[0084] The ophthalmologic apparatus 10 of the first embodiment has shown an example in which a lens opacity distribution image and a retina image may be displayed superimposed on the first graphic image 41. Also, an example has been shown in which an image (light beam image γ) showing the current state of the light beam between the subject's eye E and the acquisition optical system 20 and an image (optical axis image δ) showing the current state of the optical axis O of the acquisition optical system 20 are displayed. Here, the lens opacity image, retina image, light beam image γ, and optical axis image δ are site information of the subject's eye E that show the state of a part of the subject's eye E. Furthermore, the ophthalmologic apparatus 10 of the second embodiment has shown an example in which the current rotation angle of the acquisition optical system 20 with respect to the subject's eye E is displayed. However, the various types of information displayed on the display 25 by the control unit 30 are not limited to these.

[0085] That is, the control unit 30 may display, for example, on the display 25, as the site information of the subject's eye E, an image showing the current state of the anterior segment of the subject's eye E, an image showing the current state of the posterior segment of the subject's eye E, an image showing the current state of the vitreous body of the subject's eye E, etc. The control unit 30 may also display the current distance from the subject's eye E to the acquisition optical system 20.

[0086] Furthermore, the control unit 30 may display on the display 25 not only the current states of the crystalline lens opacity distribution and the retinal region, but also the target states of the region information of the subject's eye E. That is, the control unit 30 may display on the display screen 25a of the display 25 the target state of the anterior segment of the subject's eye E, the target state of the posterior segment of the subject's eye E, and the target states of various regions of the subject's eye E, such as the vitreous body, crystalline lens, and retinal region. The control unit 30 may also display the target rotation angle of the acquisition optical system 20 with respect to the subject's eye E and the target distance from the subject's eye E to the acquisition optical system 20.

[0087] The control unit 30 may then enlarge or reduce the area information of the subject's eye E displayed on the display 25, or change the center position of the display, in response to a touch operation by the examiner or an operation of the operation unit 26, and re-display the information on the area of ​​the subject's eye E on the display 25. That is, for example, when the examiner pinches out on the position of the optic optic disc in the fundus image of the subject's eye E, the control unit 30 may switch to and display an enlarged image of the fundus image centered on the position of the touched optic disc, or when the examiner pinches in on the position of the optic optic disc in the fundus image of the subject's eye E, the control unit 30 may switch to and display a reduced image of the fundus image centered on the position of the touched optic disc. Furthermore, when the examiner single-tap on the position of the optic disc in the fundus image of the subject's eye E, the control unit 30 may change to and display a fundus image centered on the position of the touched optic disc.

[0088] In this way, by changing the magnification and center position of the displayed information according to the examiner's operation on the area information of the subject's eye E, the area of ​​the subject's eye E that the examiner wants to check in detail or the area of ​​the subject's eye E that the examiner wants to know the outline of can be displayed in the state that the examiner desires, as needed.

[0089] In the ophthalmologic apparatus 10 of Example 1, the control unit 30, the display 25, and various sensors (the gantry position sensor 33, the tilt sensor 34, the tilt sensor 35, and the distance sensor 36) are connected to each other via cables (not shown) inside the main body 13. However, this is not limiting. The control unit 30, the display 25, and various sensors may be connected via wide-area wireless communication such as a mobile phone network or short-range wireless communication. In this case, the display 25 becomes portable and can be installed at any position. This allows the examiner to move the gantry 12 and the main body 13 while visually checking the positional relationship information J displayed on the display 25, thereby improving operability. Furthermore, even if the examiner has difficulty visually checking the position of the subject's eye E, the examiner does not need to actually check the position of the subject's eye E, and can easily move the gantry 12 and the main body 13 based on the positional relationship information J displayed on the display 25.

[0090] Here, an example of a standard for wide-area wireless communication using a mobile phone network is LTE (Long Term Evolution). Also, an example of a standard for short-range wireless communication is BLE (Bluetooth (registered trademark) Low Energy) communication, Wi-Fi (registered trademark), etc. Although it is difficult to clearly distinguish between wide-area wireless communication and short-range wireless communication, here, wide-area wireless communication refers to communication with a communication distance of 100 m or more (generally several km), and short-range wireless communication refers to communication with a communication distance of less than 100 m.

[0091] Furthermore, the display 25 may be connected to the control unit 30 and various sensors via wide-area wireless communication or the like, and the display 25 may be installed in an environment (for example, a remote location) where the examiner, who is the operator, cannot directly confirm the positional relationship between the subject's eye E and the acquisition optical system 20. Even in this case, the examiner, who visually recognizes the positional relationship information J displayed on the display 25, can issue instructions to a person, etc., near the subject or the acquisition optical system 20, to move or rotate the pedestal 12 or the main body unit 13 in a desired direction.

[0092] Furthermore, the control unit 30, the display 25, and the various sensors may be connected via a management server. In this case, the management server can collectively manage various signals transmitted and received between the control unit 30, the display 25, and the various sensors. This also makes it possible to collectively manage multiple ophthalmologic apparatuses 10.

[0093] The ophthalmologic apparatus 10 of Example 1 has shown an example in which the first graphic image 41, the light flux image γ, and the optical axis image δ are displayed as the positional relationship information J. The ophthalmologic apparatus 10 of Example 2 has shown an example in which the second graphic image 44, the first scale image 45a and the second scale image 45b, and the first numerical image 46a and the second numerical image 46b are displayed as the positional relationship information J. Here, it is sufficient that at least one of these display modes for indicating the positional relationship information J is displayed, and further, it is possible to arbitrarily select and display the first graphic image 41, the first scale image 45a, and the second scale image 45b, for example, together.

[0094] Furthermore, when displaying the positional relationship information J using a graphic image, not only a graphic image shown using isometric projection or third angle projection, but also a graphic image shown using perspective projection or oblique projection, for example, may be used.

[0095] Furthermore, any image may be selectively switched and displayed, for example, by switching between the first graphic image 41 and the second graphic image 44. Note that the selection or switching of the display is performed by displaying a selection menu on the display 25 and allowing the examiner to make a selection by touch operation, or by operating the operation unit 26 such as a keyboard.

[0096] Furthermore, in the ophthalmologic apparatus 10 of Example 1, the rotation axis 18a is set to coincide with the pupil center position of the subject's eye E by alignment, and the acquisition optical system 20 is swung and tilted up and down around the pupil center position. However, as long as the acquisition optical system 20 is swung and tilted up and down around the rotation axis 18a and the central axis 19a, the positions within the subject's eye E at which the rotation axis 18a and the central axis 19a coincide can be set appropriately and are not limited to the configurations of each Example. For example, the rotation axis 18a can be set to coincide with the center of rotation or the corneal apex of the subject's eye E. In such a configuration, the acquisition optical system 20 can be swung and tilted up and down around the center of rotation of the center of rotation or the corneal apex.

[0097] Furthermore, the ophthalmic apparatus 10 of Example 1 has a position change mechanism 15 and an angle change mechanism 17 as optical system change mechanisms, and is capable of moving the acquisition optical system 20 left and right, forward and backward, and up and down relative to the subject's eye E, as well as rotating it left and right and up and down. However, this is not limited to this. An ophthalmic apparatus to which the present invention is applied may be, for example, an ophthalmic apparatus having only the position change mechanism 15 as an optical system change mechanism, or an ophthalmic apparatus having only the angle change mechanism 17 as an optical system change mechanism. Furthermore, the ophthalmic apparatus may be an ophthalmic apparatus in which either the position change mechanism 15 or the angle change mechanism 17 is electrically driven, and the other is manually driven.

[0098] Furthermore, the ophthalmic apparatus 10 of the first embodiment is an example of a fundus camera having an acquisition optical system 20 that acquires a fundus image as ocular information of the subject's eye E. However, the present invention is not limited to this, and can be applied to any ophthalmic apparatus having an acquisition optical system that is movable with respect to the subject's eye E. For example, the present invention may be applied to an autokeratometer or autokeratometer that measures the refractive power (visual acuity) of the eyeball and cornea of ​​the subject's eye E as ocular information, or a tonometer that measures the intraocular pressure of the subject's eye E as ocular information. [Explanation of symbols]

[0099] 10 Ophthalmological equipment 11. Base 12 Mounting stand 13 Main body 15 Position change mechanism (optical system change mechanism) 17 Angle change mechanism (optical system change mechanism) 18 Swing mechanism 18a Rotation axis (reference axis) 19 Elevation mechanism 19a Center axis line (reference axis) 20 Acquisition optics 25 Display 25a display screen 26 Control section 27b 2nd display area 30 Control Unit J Location information 41 First graphic image 41A 1st Icon 41B Second Icon γ beam image δ Optical axis image 44 Second graphic image 44C Third Icon 44D 4th Icon 45a First scale image 45b Second scale image 46a First digital image 46b Second digital image E. Examined eye Ef fundus O optical axis

Claims

1. an acquisition optical system for acquiring ocular information of a subject's eye; an optical system changing mechanism that changes at least one of a position and a direction of the acquisition optical system with respect to the subject's eye by transmitting an operating force of an operator to the acquisition optical system; a display viewable by the operator; a sensor for detecting a position or a rotation angle of the acquisition optical system; a control unit that calculates a positional relationship between the subject's eye and the acquisition optical system based on the position or rotation angle of the acquisition optical system detected by the sensor, and displays positional relationship information indicating the positional relationship on the display; Equipped with The positional relationship information is displayed by a first graphic image in which a first icon representing the subject's eye and a second icon representing the acquisition optical system are displayed in isometric projection. An ophthalmic device characterized by:

2. 2. The ophthalmic apparatus according to claim 1, At least one of a light beam image showing a light beam between the eye to be examined and the acquisition optical system and an optical axis image showing an optical axis of the acquisition optical system is superimposed and displayed on the first graphic image. An ophthalmic device characterized by:

3. The ophthalmic apparatus according to claim 1 or 2, The control unit, the display, and the sensor are connected via a cable, via wide-area wireless communication, via short-range wireless communication, or via a management server. An ophthalmic device characterized by:

4. The ophthalmologic apparatus according to any one of claims 1 to 3, The display is installed in either an environment where the operator can directly confirm the positional relationship or an environment where the operator cannot directly confirm the positional relationship. An ophthalmic device characterized by:

5. The ophthalmic apparatus according to any one of claims 1 to 4, The control unit causes the display to display, on the display, site information of the subject's eye including at least one of an anterior segment of the subject's eye, a posterior segment of the subject's eye, a vitreous body of the subject's eye, a crystalline lens of the subject's eye, and a retinal region of the subject's eye, a current state or a target state of at least one of a light beam between the subject's eye and the acquisition optical system, an optical axis of the acquisition optical system, a distance from the subject's eye to the acquisition optical system, and an orientation of the acquisition optical system with respect to the subject's eye. An ophthalmic device characterized by:

6. 6. The ophthalmic apparatus according to claim 5, The control unit enlarges or reduces the part information shown on the display, or changes the display center position, and displays the part information again on the display. An ophthalmic device characterized by:

Images