JP2023160166A - Ophthalmologic apparatus and illumination control method - Google Patents

Abstract

To provide an ophthalmologic apparatus and an illumination control method enabling more accurate observation of a subject eye by a simple operation, by suppressing occurrence of a shadow on eyelids, while avoiding shading of illumination light of background illumination by an illumination system.SOLUTION: An ophthalmologic apparatus includes an illumination system supported rotatably around a subject eye, while directing a direction of radiation of first illumination light toward the subject eye, an observation system provided on the opposite side to an arrangement position of the subject eye with respect to the illumination system, and light emission parts for background illumination provided in the observation system, on lower positions than the subject eye. In the ophthalmologic apparatus, the light emitting parts are dimmed and controlled according to a relative position between the illumination system and the light emitting parts.SELECTED DRAWING: Figure 10

Description

TECHNICAL FIELD The present disclosure relates to an ophthalmologic apparatus and an illumination control method.

BACKGROUND OF THE INVENTION Ophthalmological apparatuses such as slit lamp microscopes that have a light source for background illumination have been proposed. The background illumination is used to confirm the position of the eye to be examined irradiated with the slit light during observation of the eye to be examined, and to prevent overexposure when photographing the eye to be examined with a camera. For example, Patent Document 1 discloses an ophthalmologic apparatus (slit lamp microscope) in which background illumination is installed above an observation system. The background illumination of this ophthalmological device is designed to emit illumination light obliquely downward so as to pass above the deflection optical system (illumination system) through the lighting operation, thereby avoiding the illumination light from being blocked by the illumination system. are arranged to reach.

JP 2020-141998 Publication

However, in the ophthalmological apparatus of Patent Document 1, since the illumination light is irradiated onto the eye to be examined from above, a shadow may be caused by the eyelid in the observation area of the eye to be examined. Therefore, the observation area such as the anterior segment of the eye may not be properly observed.

The present disclosure provides an ophthalmological device and illumination control that avoids blocking of background illumination light by an illumination system, suppresses the occurrence of shadows on the eyelids, and enables more accurate observation of the eye to be examined with simple operation. The purpose is to provide a method.

In order to achieve the above object, an ophthalmologic apparatus according to the present disclosure includes an illumination system rotatably supported around the eye to be examined while directing the irradiation direction of the first illumination light toward the eye to be examined; an observation system provided on the opposite side to the placement position of the eye to be examined; and a light emitting unit for background illumination provided in the observation system at a position below the eye to be examined; The light emitting section is dimmed and controlled depending on the relative position of the light emitting section.

In order to achieve the above object, an illumination control method according to the present disclosure includes an illumination system rotatably supported around the eye to be examined while directing the irradiation direction of the first illumination light toward the eye to be examined; An illumination control method for an ophthalmological apparatus comprising: an observation system provided on the opposite side to the placement position of the eye to be examined; and a light emitting unit for background illumination provided in the observation system at a position below the eye to be examined. The light emitting unit is dimmed and controlled according to the relative position of the illumination system and the light emitting unit.

According to the ophthalmological apparatus according to the present disclosure, it is possible to avoid the blocking of background illumination light by the illumination system, suppress the occurrence of shadows on the eyelids, and enable more accurate observation of the subject's eye with simple operation. It is possible to provide an ophthalmologic apparatus and an illumination control method.

FIG. 1 is a side view of an ophthalmologic apparatus according to Embodiment 1 of the present disclosure. FIG. 2 is a perspective view of the illumination system and observation system of the ophthalmological apparatus of Embodiment 1 as seen from the subject side. FIG. 7 is a schematic plan view showing a state in which illumination devices are attached to a wide camera device and a narrow camera device (Modification 1 of Embodiment 1), respectively. FIG. 2 is a front view showing a state in which the illumination system of the ophthalmological apparatus of Embodiment 1 is moved. FIG. 2 is a plan view showing the positional relationship among the eye to be examined, the illumination system, and the light emitting section in the ophthalmologic apparatus of Embodiment 1. FIG. It is a control block diagram of an ophthalmologic apparatus. 3 is an operation flowchart of the ophthalmologic apparatus according to the first embodiment. 7 is a diagram illustrating a second modification of the ophthalmologic apparatus of the first embodiment. FIG. FIG. 7 is an enlarged view of a rotation shaft to which an optical encoder is attached and a rotation shaft to which a magnetic encoder of Modification 1 of Embodiment 2 is attached in the ophthalmologic apparatus of Embodiment 2. FIG. 7 is an operation flowchart of the ophthalmologic apparatus according to the second embodiment. FIG. 7 is a front view illustrating an ophthalmological apparatus of Modification 2 and Modification 3 of Embodiment 2. FIG. 7 is a perspective view of the illumination system and observation system of the ophthalmologic apparatus according to Embodiment 3, viewed from the subject side. FIG. 7 is a front view illustrating an ophthalmologic apparatus according to Modification 1 of Embodiment 3; FIG. 7 is a front view of an ophthalmologic apparatus according to a fourth embodiment. FIG. 7 is a front view of an ophthalmologic apparatus according to a fourth embodiment.

(Embodiment 1)
Embodiment 1 of the present disclosure will be described below based on the drawings. In the following description, the ophthalmological apparatus 10 has a subject side as a front, an opposite side (examiner side) as a rear side, a left side as seen from the subject side as a left, and an opposite side as a right side. Further, the ophthalmologic apparatus 10 will be described with the upper side of FIG. 1 as the top and the opposite side as the bottom.

First, the configuration of the ophthalmologic apparatus 10 will be described. FIG. 1 is a side view of the ophthalmologic apparatus 10A (10). As shown in FIG. 1, the ophthalmological apparatus 10A of this embodiment is a so-called Zeiss type (Littman type) slit lamp microscope, and includes a base 12, a face support part 14, an electric drive part 16, a movable table 18, and an operation lever. 20, first support member 22, microscope support arm 24, rotation shaft 26, second support member 28, rotation shaft 30, illumination system 32, observation system 34 (microscope section), illumination device for background illumination 36, and a light source operation section 38.

The base 12 can be placed on an optometry table (not shown). The face support 14 is provided above the base 12 thereof. Further, the electric drive section 16 and the light source operation section 38 are provided on the upper surface of the base 12. Furthermore, the movable table 18 is held movably in the horizontal direction (front-back direction Dy and left-right direction Dx). Note that the front-back direction Dy is the front direction approaching the subject and the back direction moving away from the subject, and the left-right direction Dx is the interpupillary direction of the subject.

The face support part 14 includes a pair of columns 14a fixed to the base 12 and extending in the vertical direction, a chin rest 14b provided at an intermediate portion in the vertical direction of the pair of columns 14a, and a pair of columns 14a in the vertical direction of the pair of columns 14a. It has a forehead rest 14c provided at the upper end. The subject's face is supported by the face support section 14 by the subject placing his chin on the chin rest 14b and placing his forehead on the forehead rest 14c. Thereby, the position of the eye E to be examined is fixed. Note that the eye E to be examined is fixed so as to be located substantially above the rotation axis 26 and the rotation axis 30.

The electric drive unit 16 is a movement mechanism that moves the movable table 18 on the base 12 in the horizontal direction (left-right direction Dx and front-back direction Dy). Further, the operating lever 20 is provided above the movable table 18 and at the rear end portion on the rearward side (examiner side). Further, the first support member 22 is provided on the upper surface of the movable table 18 so as to be movable in the vertical direction (as can be raised and lowered).

The electric drive unit 16 includes a plurality of motors (not shown) and a drive transmission mechanism (not shown) that converts the rotation of each motor into driving force in the horizontal direction (Dx, Dy) and the vertical direction Dz. The electric drive unit 16 has a function of moving the movable table 18 in the horizontal direction (Dx, Dy) according to the operation of the operating lever 20, and a function of moving the first support member 22 in the vertical direction Dz. This makes it possible to adjust the position of the first support member 22 (illumination system 32 and observation system 34) with respect to the eye E to be examined.

The operating lever 20 is an operating member for manually moving the first support member 22 (illumination system 32 and observation system 34) in the horizontal direction (Dx, Dy) and in the vertical direction Dz. For example, when the operating lever 20 is tilted in the front-rear direction Dy or the left-right direction Dx, the electric drive unit 16 moves the movable table 18 in the front-rear direction Dy or the left-right direction Dx. Further, when the operating lever 20 is rotated around the axis, the electric drive unit 16 moves the first support member 22 in the vertical direction Dz. Note that a switch 20a used for photographing, etc. is provided at the top of the operating lever 20.

A microscope support arm 24 is provided on the first support member 22 . The microscope support arm 24 has a horizontal arm part 24a and a vertical arm part 24b, and is formed into a substantially L-shape when viewed from the side, as shown in FIG.

The front side (eye E side) end of the horizontal arm part 24a horizontally rotates on the first support member 22 (the horizontal plane is used as a rotation plane) via a rotation shaft 26 extending in the vertical direction Dz. (rotation). Further, the second support member 28 is attached so as to be horizontally rotatable via a rotation shaft 30 located on an extension line (that is, substantially coaxially) of the rotation shaft 26 of the horizontal arm portion 24a.

Note that the horizontal rotation of the microscope support arm 24 about the rotation axis 26 and the horizontal rotation of the second support member 28 about the rotation axis 30 may be performed manually by the examiner or may be performed manually. It may be performed electrically using the illustrated electric rotating mechanism.

An observation system 34, which is a microscope section, is attached to the upper end of the vertical arm section 24b. Further, the second support member 28 is provided with an illumination system 32 .

The illumination system 32 includes a slit lamp 44 that emits the first illumination light L1 and a deflection optical system 46. The slit lamp 44 emits slit light as the first illumination light L1 toward the deflection optical system 46. The deflection optical system 46 is provided above the slit lamp 44 and has a deflection section 48 above the slit lamp 44 that deflects the first illumination light L1 toward the eye E. The deflection unit 48 is constituted by a deflection optical element such as a mirror (reflector) or a prism, and deflects (guides) the first illumination light L1 emitted from the slit lamp 44 toward the eye E to be examined. Thereby, the first illumination light L1 is irradiated onto the eye E to be examined. Note that in this embodiment, a prism is used as the deflection optical element. Note that the slit lamp 44 and the deflection optical system 46 are not limited to those shown in FIG. There are no particular limitations.

The illumination system 32 is horizontally rotated integrally with the second support member 28 about the rotation axis 30 . Since the face support part 14 fixes the face so that the eye E to be examined is located substantially above the rotation axis 30, the illumination system 32 directs the irradiation direction of the first illumination light L1 toward the eye E to be examined. It is rotatably supported around E. Thereby, the irradiation direction (incident angle) of the first illumination light L1 to the eye E to be examined can be adjusted.

The observation system 34 is provided on the opposite side of the illumination system 32 from the placement position of the eye E to be examined. The observation system 34 is used to observe the subject's eye E, which is irradiated with the first illumination light L1 emitted from the illumination system 32 and various types of light emitted from an illumination device 36, which will be described later. An objective lens 50, which is a light receiving section, is provided at the front end of the observation system 34 on the front side (on the eye E side to be examined), and an eyepiece lens 52 is provided at the rear end on the rear side (examiner side). The symbol LA in FIG. 1 is an axis line that connects the eye E to be examined and the objective lens 50 (light receiving section), and is the optical axis (observation axis) of the objective lens 50.

The observation system 34 , for example, adjusts the magnification of the light received by the objective lens 50 , guides the light to the examiner side (the rear side of the ophthalmological apparatus 10 ), and outputs the light from the eyepiece lens 52 . Further, the observation system 34 can be horizontally rotated integrally with the microscope support arm 24 about the rotation axis 26. Therefore, the observation system 34 can adjust the observation direction of the eye E to be examined.

Furthermore, the observation system 34 of this embodiment includes a camera device 56 that images the eye E through the optical system of the observation system 34. The camera device 56 is provided on the opposite side of the observation system 34 from the eye E to be examined (or the objective lens 50). The camera device 56 is, for example, a digital camera. The camera device 56 is formed into a long length and is detachably attached to the housing of the observation system 34 (in the example of FIG. 1, the vertical arm portion 24b) so that the long axis faces the vertical direction Dz. It is being

The camera device 56 includes an image capturing section 561 (not shown) that receives the first illumination light L1 reflected by the eye E and captures an image, a power supply circuit 562, and a control circuit 563. The imaging unit 561 is an imaging device such as a CMOS image sensor or a CCD image sensor. A portion of the first illumination light L1 that has entered the camera device 56 through the objective lens 50 is guided to the imaging unit 561 by a half mirror or the like and is imaged. The other part of the first illumination light L1 is guided to the eyepiece lens 52 side. The power supply circuit 562 is a circuit that supplies driving power to the camera device 56. The power supply circuit 562 may be configured as a circuit that distributes a portion of the power supplied from the ophthalmologic apparatus 10 to each functional unit, or may be configured to include a battery, a transformer, or a power generation circuit.

The illumination device 36 is provided in the observation system 34 at a position below the eye E to be examined. FIG. 3 shows a schematic plan view of an observation system 34A (34) in which an illumination device 36A is attached to a wide camera device 56 of this embodiment. The ophthalmological apparatus 10A in FIG. 1 has an observation system 34A. The illumination device 36A of the observation system 34A includes a long illumination main body 361 provided with a plurality of light emitting parts 363 (details will be described later) for background illumination, and an elongated illumination main body 361 extending rearward from both ends of the illumination main body 361. and an arm portion 362. The lighting device 36A has a substantially U-shape in plan view, with a lighting main body portion 361 and an arm portion 362 connected at a substantially right angle.

The camera device 56 in the observation system 34A of this embodiment includes the above-described imaging section 561 and light emitting section 363. The illumination device 36A is connected to and fixed to the camera device 56. For example, the illumination device 36A is connected to the camera device 56 so that the vertical arm portion 24b of the observation system 34A is sandwiched between the arm portion 362 of the illumination main body portion 361 formed in a U-shape, and the illumination device 36A is connected to the camera device 56 so as to sandwich the vertical arm portion 24b of the observation system 34A. It is formed so that it can be inserted and removed from the eye E side of the camera device 56, which is wider than the vertical arm portion 24b in the movable direction of the system 32. In the example of the observation system 34A, the illumination device 36A connects an insertion section 362a (for example, a jack) provided at the end of the arm section 362 and an inserted section 56a (for example, a receptacle) provided at the camera device 56. By connecting, it is fixed to the camera device 56. Note that the lower surface of the illumination main body portion 361 may be supported by a support protrusion that protrudes forward from the front side surface of the vertical arm portion 24b.

Further, the illumination device 36A can receive power supply from the power supply circuit 562 of the camera device 56 via a wiring cable that runs through the inside of the arm portion 362. Furthermore, the control circuit of the illumination device 36 may be shared with the circuit board of the control circuit 563 of the camera device 56, or may be provided within the housing of the camera device 56 separately from the circuit board of the control circuit 563 for the camera device 56. The circuit board may be provided and housed in the circuit board. By housing the circuit board of the control circuit of the lighting device 36 within the housing of the camera device 56, the lighting device 36 and the camera device 56 can be downsized as a whole.

The light emitting unit 363 has a light source that can selectively emit a plurality of different types of light (for example, three types of light: visible light, infrared light, and excitation light) to the eye E to be examined. In this embodiment, as shown in FIG. 2, an infrared light source 363a capable of emitting infrared light and a visible light source 363b capable of emitting visible light are arranged vertically on the front side of the illumination main body 361.

The light source operation unit 38 is provided on the upper surface of the base 12 on the rear side (examiner side). The light source operation section 38 is used by the examiner to turn on or off the slit lamp 44 and adjust the light amount, and to turn on or off the light emitting section 363 and adjust the light amount, as will be described in detail later.

FIG. 4 is a front view of the illumination system 32 and the observation system 34 as seen from the subject (eye E) side. FIG. 4 shows an ophthalmological apparatus 10A and an ophthalmic apparatus 10B in which the relative positions of the illumination system 32 with respect to the observation system 34 are different. A plurality of light emitting units 363 are provided in the left-right direction Dx, which is the movable direction of the illumination system 32 when viewed from the eye E side. In other words, the illumination system 32 is configured to be movable in the direction in which the light emitting section 363 is arranged. In the light emitting unit 363 of this embodiment, one infrared light source 363a and one visible light source 363b, which are the same type of light source, are arranged at both right and left end portions when viewed from the front. The visible light source 363b is arranged above the infrared light source 363a.

FIG. 5 is a plan view of the illumination system 32 and observation system 34. The light emitting unit 363 is configured to adjust the position of the eye E to be examined (a reference position of the eye E to be examined, such as the approximate center position of the eye E or the position of the anterior segment) in a plan view from the direction of the rotation axis 30 of the illumination system 32. ) from the origin O, which is located on the observation axis LA connecting the objective lens 50, which is the light receiving part of the observation system 34, is located outside of the light shielding angle θ formed by the two tangents L3 of the illumination system 32. . Therefore, as shown in FIG. 5, when the illumination system 32 is located approximately on the observation axis LA, the eye E is exposed to the back light from both light emitting units 363 disposed at both ends of the illumination device 36 in the left-right direction Dx. It can be irradiated with the second illumination light L2 as ground illumination.

FIG. 6 is a schematic diagram of the light source operation unit 38 and the control device 40 included in the ophthalmologic apparatus 10A (10). The light source operating section 38 includes a slit lamp light source operating section 381, an infrared light source operating section 382, and a visible light source operating section 383. Further, the ophthalmologic apparatus 10A includes a storage device (also referred to as a storage medium), not shown, that stores a control program for executing each function of the ophthalmologic apparatus 10A.

The slit lamp light source operation section 381 receives an operation to turn on or turn off the slit lamp 44 and an operation to adjust the amount of first illumination light (slit light) emitted from the slit lamp 44 . The infrared light source operation section 382 receives an operation to turn on or turn off the infrared light source 363a and an operation to adjust the amount of infrared light emitted from the infrared light source 363a. The visible light source operation unit 383 receives an operation to turn on or turn off the visible light source 363b and an operation to adjust the amount of visible light emitted from the visible light source 363b.

The control device 40 is provided, for example, within the movable table 18 (or may be outside the ophthalmologic apparatus 10A), and centrally controls the operations of each part of the ophthalmologic apparatus 10A. The control device 40 is, for example, an arithmetic device such as a personal computer, and includes an arithmetic circuit including various processors, memories, and the like. Various types of processors include CPUs (Central Processing Units), GPUs (Graphics Processing Units), ASICs (Application Specific Integrated Circuits), and programmable logic devices [e.g. SPLDs]. (Simple Programmable Logic Devices), CPLD (Complex Programmable Logic Device), and FPGA (Field Programmable Gate Arrays)]. Note that the various functions of the control device 40 may be realized by one processor, or may be realized by a plurality of processors of the same type or different types.

The control device 40 drives the electric drive unit 16 to move the movable table 18 in the front-rear direction Dy or the left-right direction Dx in response to a tilting operation of the operation lever 20 in the front-rear direction Dy or the left-right direction Dx, and also controls the operation lever 20 According to the rotation operation around the axis, the electric drive unit 16 can be driven to move the first support member 22 in the vertical direction Dz.

In addition, the control device 40 turns on or off each light source of the slit lamp 44, the infrared light source 363a, and the visible light source 363b, and outputs light from each light source in response to inputs of on/off operations and light amount adjustment operations to the light source operation unit 38. control the amount of light used. Thereby, the examiner can easily switch on or off the light source corresponding to the on or off operation and adjust the amount of light emitted from the light source corresponding to the light amount adjustment operation. Therefore, the control device 40 functions as a light source control section of the present invention. This makes it easier to switch the light source, adjust the light amount, and the like, compared to manual operations (for example, switching filters, etc.).

Returning to FIG. 4, the ophthalmological apparatus 10A-1 (10A) shows a state in which a wide illumination device 36A in the left-right direction Dx is attached to the observation system 34, and the illumination system 32 is positioned approximately on the observation axis LA. There is. In the ophthalmological apparatus 10A-1, even if the observation system 34 is displaced to some extent in the left-right direction Dx with respect to the observation axis LA, the eye E is not irradiated with the second illumination light L2 from the light emitting units 363 at both left and right ends. Can receive.

Furthermore, when the illumination system 32 moves relative to the observation system 34 as in the ophthalmological apparatus 10A-2 (10A) in FIG. However, since the ophthalmological apparatus 10A-2 (10A) of this embodiment has a plurality of light emitting sections 363 in the left-right direction Dx, light is emitted from at least some of the light emitting sections 363 (the right light emitting section 363 in FIG. 4). The second illumination light L2 can be irradiated onto the eye E regardless of the position of the illumination system 32.

Here, an example of an operation flowchart of the ophthalmologic apparatus 10A will be described with reference to FIG. 7. In addition, in the flowchart of FIG. 7, an example will be described in which the operation of the ophthalmological apparatus 10A is performed semi-manually (or semi-automatically by the control device 40) using the operating lever 20 or the light source operating section 38, etc., regarding steps S08 and S09. However, other processes may be executed manually or automatically by the control device 40.

First, in step S01, the subject places his chin on the chin rest 14b to support his face and fixes the position of the eye E to be inspected. In step S02, a user such as an examiner turns on the illumination system 32 by operating the operating lever 20 or the like (switching it to "ON").

In step S03, the user operates the operating lever 20 to adjust the position and angle of the illumination system 32 in accordance with the position of the eye E to be examined. In step S04, the user performs alignment adjustment of the ophthalmological apparatus 10A. The user also operates the light source operation unit 38 to adjust the slit width of the first illumination light L1 irradiated to the eye E in step S05, and adjusts the brightness of the first illumination light L1 in step S06. etc., etc.

In step S07, the user confirms the emission angle of the first illumination light L1 from the illumination system 32 to the eye E with respect to the observation axis LA, and the ophthalmological apparatus 10A moves the illumination system 32 to an arbitrary position (i.e. , an arbitrary angle with respect to the observation axis LA).

In step S08, the control device 40 turns on (or switches to "ON") any light source for background illumination by the user's operation on the light source operation unit 38. Note that whether to turn on either the infrared light source 363a or the visible light source 363b in the light emitting unit 363 may be set manually by the user's operation, or may be set automatically by the control device 40. .

In step S09, the control device 40 dims the light source for background lighting that has been turned on. The ophthalmologic apparatus 10A of this embodiment has a function of dimming the light emitting section 363 according to the relative position of the illumination system 32 and the light emitting section 363. The light adjustment function is performed by the user via the light source operation unit 38, for example, while checking the image of the eye E using the eyepiece 52 (see FIG. 1), an external monitor (not shown), or the like.

The control device 40 can irradiate the eye E with the second illumination light L2 emitted from the left and right light emitting units 363 when the illumination system 32 is located on the observation axis LA side by the user's operation on the light source operation unit 38. In this case (see ophthalmologic apparatus 10A-1 in FIG. 4), the left and right light emitting sections 363 can be turned on.

On the other hand, when observing the eye E to be examined, the illumination system 32 is mainly located at a position off (away from) the observation axis LA connecting the eye E to be examined and the objective lens 50 which is the light receiving part of the observation system 34. Therefore, the first illumination light L1 is irradiated onto the eye E from a direction inclined with respect to the observation axis LA. Therefore, when the illumination system 32 is leftward (or rightward) away from the observation axis LA and the second illumination light L2 emitted from some of the light emitting units 363 is blocked (the ophthalmological apparatus 10A in FIG. -2) turns off some of the light emitting sections 363 from which the second illumination light L2 is blocked. Thereby, wasteful power consumption of the ophthalmologic apparatus 10A can be suppressed.

In step S10, the camera device 56 is operated by an input operation to the operating lever 20, and an image of the eye E to be examined is captured. The captured image is stored in a storage device or the like of the ophthalmological apparatus 10A.

The ophthalmologic apparatus 10A of this embodiment has been described above. In the conventional ophthalmological apparatus exemplified in Patent Document 1, an operator such as an ophthalmologist or a nurse operates a lighting adjustment means located at a distance from the operator's hand to turn on or turn off the background lighting and adjust it. Since it was necessary to control the light, etc., the operation was troublesome. Further, the power source of the lighting device for background illumination may be configured to receive power through a separate wiring from the power source used for other components of the ophthalmologic apparatus. Therefore, two lines of wiring are drawn out from the ophthalmologic apparatus, which requires space for installing the ophthalmologic apparatus and increases wiring costs, which is not economical.

The ophthalmological apparatus 10A of this embodiment has a configuration in which the illumination device 36A is connected to the camera device 56, so that the user can adjust the background illumination at hand, and the power supply for the second illumination light L2 is also connected to the camera device 56. Since it can also be used as a power source for the device 56, wiring and space savings can be expected. In the conventional configuration, a lighting device for background illumination was attached to the top of the observation system, so the top position of the casing of the observation system was relatively high. For this reason, it was sometimes difficult to attach equipment such as an applanation tonometer, but in the ophthalmological apparatus 10A, it is possible to share the control circuit of the illumination device 36 and the camera device 56, and the board of the power supply circuit. Therefore, it is possible to achieve cost reduction, wiring reduction, and miniaturization (space saving) while providing lighting functions and photographing functions.

In the present embodiment, the illumination device 36A is configured to be removable (attachable) from the eye E side, but the present invention is not limited to this. For example, the illumination device 36A may be configured to be insertable and removable from the camera device 56 from the examiner's side, from the right or left side of the ophthalmologic apparatus 10, from above, or from any other arbitrary direction.

(Modification 1 of Embodiment 1)
Note that, as described with respect to the observation system 34A in FIG. 3, this embodiment describes a configuration in which the illumination device 36 can be inserted into and removed from the eye E side of the camera device 56, which is wider than the vertical arm portion 24b. However, as shown in the observation system 34B in FIG. 3, the inserted portion is configured such that the horizontal width of the camera device 56 is narrower than the horizontal width of the illumination device 36B, and the insertion portion 362a is formed on the left and right side surfaces of the camera device 56. A configuration may be adopted in which connection is made from the 56a side. When connecting the lighting device 36B to the camera device 56, it is possible to prevent the lighting device 36B from falling off unintentionally.

(Modification 2 of Embodiment 1)
FIG. 8 is a front view of an ophthalmological apparatus 10C (10) having an illumination system 32C (32) higher than the observation system 34 shown in FIG. In addition, in the description of the ophthalmological apparatus 10C, the same components as the ophthalmological apparatus 10A are given the same reference numerals, and the description thereof will be omitted or simplified. The ophthalmologic apparatus 10C includes a so-called tower-type illumination system 32C instead of the illumination system 32A of the first embodiment. The illumination system 32C includes two pillars 32C1 spaced apart from each other so as to open the periphery of the observation axis LA when viewed from the front in FIG. The lower part of each support column 32C1 is supported by the second support member 28 shown in FIG. 1, although details are not shown, and is rotatably connected by a rotation shaft 30. Furthermore, a slit lamp 44 and an illumination optical system 46C are arranged above the support column 32C1. The illumination optical system 46C of the illumination system 32C is provided below the slit lamp 44, and has a deflection section 48C below the slit lamp 44 for deflecting the first illumination light L1 toward the eye E. . Note that the deflection section 48C is supported by the second support member 28 (see also FIG. 1) of the illumination system 32C, but detailed illustration of the support structure is omitted. Further, a deflection section 48C having the same function as the deflection section 48 described above is, for example, a mirror (reflector) or a prism, and directs the first illumination light L1 emitted from the slit lamp 44 toward the eye E to be examined. Deflect (light guide).

Further, FIG. 5 also shows the positional relationship between the support 32C1 of the ophthalmologic apparatus 10C (the support 32C1 is shown by a dashed line), the eye E, and the light emitting unit 363. The light emitting unit 363 is an observation axis that connects the origin O, which is the position of the eye E, to the objective lens 50, which is the light receiving unit of the observation system 34, in a plan view seen from the direction of the rotation axis 30 of the illumination system 32 (32C). The illumination system 32 (32C) is arranged outside the light shielding angle θ formed by the two tangents L3 when located on the LA. Therefore, in a state where the tower-shaped illumination system 32C is located on the observation axis LA, the eye E is illuminated by light as background illumination from both of the light-emitting units 363 disposed at both ends of the left-right direction Dx of the illumination device 36A. It can be irradiated with two illumination lights L2.

In the case of an ophthalmological apparatus in which a light emitting unit for background illumination is installed above the observation system, if a tower type illumination system (for example, illumination system 32C) is used, depending on the rotational position of the illumination system, light may be emitted from the light emitting unit. It is assumed that the illumination light is blocked by the illumination system and cannot sufficiently illuminate the eye E to be examined. However, the ophthalmological apparatus 10C including the illumination device 36A of the present embodiment can avoid blocking the illumination light of the background illumination by the illumination system even when using the tower type illumination system 32C. It is possible to suppress the occurrence of shadows on the eyelids and to irradiate the second illumination light L2 as background illumination from one of the light emitting parts 363 to the eye E to be examined, thereby enabling more accurate observation of the eye to be examined. can.

(Embodiment 2)
Next, a second embodiment of the present disclosure will be described. The ophthalmologic apparatus 10D of the second embodiment automatically controls the dimming of the second illumination light emitted from the light source for background illumination. FIG. 9 shows an ophthalmologic apparatus 10D including rotation shafts 26 and 30 to which an optical encoder 61 (position detection section) is attached, and rotation shafts 26 and 30 to which a magnetic encoder 62 (position detection section) is attached. It is an enlarged view of each rotation axis 26, 30 of ophthalmological apparatus 10E provided with. In Embodiment 2, an ophthalmologic apparatus 10D will be described. In addition, in the description of the ophthalmologic apparatus 10D, the same components as those of the ophthalmologic apparatus 10A are given the same reference numerals, and the explanation thereof will be omitted or simplified.

The ophthalmologic apparatus 10D has most of the configurations similar to the ophthalmologic apparatus 10A shown in FIG. 1. The ophthalmologic apparatus 10D includes an optical encoder 61 on the rotation shafts 26 and 30. For example, a rotary encoder is used as the optical encoder 61, and includes an optical sensor 611 and a slit disk 612. The slit disk 612 is arranged coaxially with the rotating shafts 26 and 30 and is formed into a flat plate shape, and is provided with a plurality of slits (openings or notches) intermittently in the circumferential direction around the outer periphery. ing. Further, the optical sensor 611 is a light emitting/receiving sensor in which a light emitting part and a light receiving part are formed integrally or separately. The optical sensor 611 irradiates light onto the array positions of the slit disks 612 and receives reflected or transmitted light. The control device 40 (see FIG. 6) of the ophthalmological apparatus 10D can receive the light detection signal from the optical sensor 611 and detect the rotation angle of the rotation shafts 26 and 30. Therefore, the control device 40 can detect the rotation angle of the illumination system 32 with respect to the observation system 34 using the optical encoder 61.

Next, an example of an operation flowchart of the ophthalmologic apparatus 10 will be described with reference to FIG. 10. In the flowchart of FIG. 10, the processes or operations of step S21, step S22, step S23, step S24, step S25, and step S26 are the processes of step S01, step S02, step S03, step S04, step S05, and step S06, respectively. or similar to the operation. Further, the process in step S29 is similar to the process in step S10.

In step S27, the ophthalmologic apparatus 10D turns on (or switches to "ON") the light source for background illumination by the user's operation on the light source operation unit 38. The ophthalmological apparatus 10D also has a function of controlling the light emitting section 363 to dim in accordance with the relative position of the illumination system 32 and the light emitting section 363. The dimming control includes switching ON or OFF of emission of the second illumination light L2 by the light emitting unit 363 and adjusting the light amount. As an example of dimming control, the control device 40 uses the optical encoder 61 to detect the relative position (rotation angle) of the illumination system 32 with respect to the observation system 34 adjusted in step S23. For example, the control device 40 controls one side of the light emitting unit 363 that is a light source for background illumination of the ophthalmological apparatus 10A shown in FIG. It has a function of automatically selecting and lighting the light emitting section 363 so as to turn on the light and turn off the other side that is shielded from light by the illumination system 32. Second illumination light L2 (see FIG. 1) is emitted from the lighted light emitting section 363.

Note that the ophthalmological apparatus 10D stores in advance the rotation angles of the illumination system 32 and the observation system 34 in the storage device, and the degree to which the second illumination light L2 emitted from each light emitting unit 363 reaches the subject's eye E. It has correspondence information that corresponds to information. Alternatively, the storage device stores a predetermined angle among the rotation angles as threshold information for turning on or turning off the light emitting section 363. For example, as shown in the ophthalmological apparatus 10A-1 in FIG. When a part of the light emitting part 363 (for example, 80% or half of the whole) is not blocked by the illumination system 32, the light emitting part 363 can be controlled to turn on.

Further, whether to turn on either the infrared light source 363a or the visible light source 363b in the light emitting unit 363 may be set manually by the user's operation, or may be set automatically by the control device 40. .

In step S28, the control device 40 dims the background lighting light emitting unit 363 (light source) that has been turned on. As described above, a plurality of light emitting units 363 are provided in the movable direction of the illumination system 32 when viewed from the eye E side. The control device 40 has a dimming control function that dims the light emitting unit 363 so as to suppress a change in the amount of second illumination light L2 that reaches the eye E from the light emitting unit 363 regardless of the position of the illumination system 32. have Specifically, like the ophthalmological apparatus 10A-2 in FIG. 4, when the second illumination light L2 is emitted, the control device 40 controls one light emitting section 363 (the right light emitting section in FIG. 4) that is not blocked by the illumination system 32. 363) is turned on, and when both light emitting parts 363 that are not blocked by the illumination system 32 are turned on when emitting the second illumination light L2, as in the ophthalmological apparatus 10A-1, the amount of light is about the same. The output of the light emitting section 363 is controlled so that That is, the control device 40 performs control to reduce the output of the second illumination light L2 when there are many light-emitting units 363 turned on, and to increase the output of the second illumination light L2 when there are few light-emitting units 363 turned on. In this way, the control device 40 controls the light amount of the second illumination light L2 according to the number of light sources of the second illumination light L2 that can reach the eye E to be examined, thereby improving the observation by the examiner or the imaging in step S29. When performing this, it is possible to suppress changes in brightness around the observation area, etc., regardless of the position of the illumination system 32.

Also in this embodiment, when observing the eye E to be examined, the illumination system 32 is mainly moved away from the observation axis LA connecting the eye E to be examined and the objective lens 50 which is the light receiving part of the observation system 34. 2), the first illumination light L1 is irradiated onto the eye E from a direction inclined with respect to the observation axis LA. Therefore, as shown in the ophthalmological apparatus 10A-2 in FIG. 4, the illumination system 32 is moved leftward (or rightward) from the observation axis LA, and the second illumination light L2 emitted from some of the light emitting sections 363 is blocked. If so, some light emitting units 363 that cannot irradiate the eye E with the second illumination light L2 are turned off. Thereby, wasteful power consumption of the ophthalmologic apparatus 10 can be suppressed.

As described above, the ophthalmologic apparatus 10D of the second embodiment has a configuration in which the light emitting unit 363 is controlled to suppress a change in the amount of second illumination light L2 that reaches the eye E from the light emitting unit 363 regardless of the position of the illumination system 32. Therefore, when observing the eye E to be examined, it is possible to more accurately observe the eye E under background illumination with a simple operation while suppressing the occurrence of shadows on the eyelids.

(Modification 1 of Embodiment 2)
Note that the ophthalmologic apparatus 10D may be an ophthalmologic apparatus 10E that includes a magnetic encoder 62 instead of the optical encoder 61. The magnetic encoder 62 includes, for example, a magnetic sensor 621 (for example, a Hall element) fixed to the rotation shaft 30, and a magnetic drum 622, which is a permanent magnet, arranged annularly around the rotation shaft 26. 30 outputs a detection signal according to the rotation angle with respect to the rotation axis 26. The control device 40 can determine the rotation angle (relative position) of the illumination system 32 with respect to the observation system 34 based on the detection signal acquired from the magnetic encoder 62. The ophthalmological apparatus 10E can operate according to the flowchart of FIG. 10 similarly to the ophthalmological apparatus 10D.

Furthermore, the ophthalmological apparatus 10 uses other encoders such as a mechanical encoder (potentiometer) or an electromagnetic induction encoder in addition to the optical encoder 61 and the magnetic encoder 62 as a device for detecting the angle of the illumination system 32 with respect to the observation system 34. May be used.

(Modification 2 and Modification 3 of Embodiment 2)
Next, modified examples 2 and 3 of the second embodiment will be described. FIG. 11 is a front view illustrating an ophthalmological apparatus 10F (10) of a second modification and an ophthalmological apparatus 10G (10) of a third modification in the second embodiment. In addition, in the description of the ophthalmologic apparatus 10F and the ophthalmologic apparatus 10G, the same components as those of the ophthalmologic apparatus 10A are given the same reference numerals, and the explanation thereof will be omitted or simplified.

The illumination device 36F of the ophthalmological apparatus 10F includes a camera section 63 approximately at the center of the illumination main body section 361 in the left-right direction Dx. The ophthalmological apparatus 10G can capture an image of the illumination system 32 side using the camera unit 63, and can detect the position of the illumination system 32 using the control device 40 from the acquired image. The illumination device 36G stores the rotation angle of the illumination system 32 and the observation system 34 in advance in the storage device, and the light shielding information about how much the second illumination light L2 emitted from each light emitting part 363 reaches the eye E to be examined. It has correspondence information that corresponds to. Alternatively, the storage device stores a predetermined angle among the rotation angles as threshold information for turning on or turning off the light emitting section 363.

The control device 40 of the ophthalmological apparatus 10F can determine the rotation angle (relative position) of the illumination system 32 with respect to the observation system 34 based on the data of the image acquired by the camera section 63. Further, the ophthalmologic apparatus 10F can operate according to the flowchart in FIG. 10 similarly to the ophthalmologic apparatus 10D.

The illumination device 36G of the ophthalmological apparatus 10G includes a TOF (Time of Flight) sensor 64 approximately in the center of the illumination main body 361 in the left-right direction Dx. The ophthalmological apparatus 10G can detect the presence or absence of the illumination system 32 using the TOF sensor 64. Note that the illumination device 36G also stores in advance the rotation angle of the illumination system 32 and the observation system 34 in the storage device, and the degree to which the second illumination light L2 emitted from each light emitting unit 363 reaches the subject's eye E. It may have correspondence information that corresponds to the information, or a predetermined angle among the above rotation angles may be stored as threshold information for turning on or turning off the light emitting section 363.

The control device 40 of the ophthalmological apparatus 10G can determine the rotation angle (relative position) of the illumination system 32 with respect to the observation system 34 based on data regarding the position information of the illumination system 32 acquired from the TOF sensor 64. Further, the ophthalmologic apparatus 10G can operate according to the flowchart in FIG. 10 similarly to the ophthalmologic apparatus 10D.

(Embodiment 3)
Next, Embodiment 3 will be described. FIG. 12 is a perspective view of the illumination system 32 and observation system 34 of the ophthalmologic apparatus 10H (10) of this embodiment, viewed from the eye E side. In addition, in the description of the ophthalmological apparatus 10H, the same components as the ophthalmological apparatus 10A are given the same reference numerals, and the description thereof will be omitted or simplified.

The ophthalmologic apparatus 10H includes an illumination device 36H instead of the illumination device 36A in the ophthalmologic apparatus 10A. In the illumination device 36H, the left and right width of the illumination main body portion 361 is formed shorter than that of the illumination device 36A, and the arrangement interval of the arm portions 362 is formed narrower. In the ophthalmological apparatus 10H using slit light, when observing the eye E, the illumination system 32 mainly moves from the observation axis LA connecting the eye E and the objective lens 50, which is the light receiving part of the observation system 34. The first illumination light L1 is irradiated onto the eye E from a position away from the eye E from a direction inclined with respect to the observation axis LA. Therefore, as shown in the front view around the observation axis LA shown in FIG. Even if the light emitting unit 363 is arranged in such a way that the light emitting unit 363 is shielded from light, the illumination system 32 and the light emitting unit 363 can be separated by detecting the position of the illumination system 32 where the second illumination light L2 is blocked by the illumination system 32. The light emitting unit 363 is dimmed and controlled according to the relative position of the second illumination light L2 to prevent the second illumination light L2 from being blocked during observation of the eye E. Therefore, similarly to Embodiment 1 or 2, when observing the eye E to be examined, it is possible to more accurately observe the eye E under background illumination while suppressing the occurrence of shadows on the eyelids. . In addition, the ophthalmologic apparatus 10H can be configured to be compact as a whole because the illumination device 36H has a short horizontal width.

Further, the ophthalmologic apparatus 10H can perform the processing and operations shown in the flowchart of FIG. As a result, when observing the eye E, it is possible to more accurately observe the eye E using the background illumination with less man-hours while suppressing the occurrence of shadows on the eyelids. The peripheral parts can be downsized.

Further, the ophthalmologic apparatus 10H may perform the processing and operation shown in the flowchart of FIG. Thereby, when observing the eye E to be examined, it is possible to reduce the size of the illumination device 36H while suppressing the occurrence of shadows on the eyelids.

(Modification 1 of Embodiment 3)
Next, a first modification of the third embodiment will be described. FIG. 13 is a front view illustrating an ophthalmologic apparatus 10I (10) of Modification 1 in Embodiment 3. The ophthalmologic apparatus 10I includes an illumination device 36I instead of the illumination device 36A in the ophthalmologic apparatus 10A. In addition, in the description of the ophthalmologic apparatus 10I, the same components as those of the ophthalmologic apparatus 10A are given the same reference numerals, and the explanation thereof will be omitted or simplified.

The illumination device 36I of the ophthalmologic apparatus 10I includes a plurality of light emitting sections 363 arranged approximately in the center of the illumination main body section 361 in the left-right direction Dx.

Further, the rotation angle of the illumination system 32 in the ophthalmological apparatus 10I can be determined by using any configuration of the aforementioned encoder (for example, the optical encoder 61, the magnetic encoder 62, etc.), the camera section 63, the TOF sensor 64, etc. This can be performed by the control device 40 using the control device 40. When observing the eye E to be examined, the illumination system 32I is mainly located at a position off (away from) the observation axis LA connecting the eye E to be examined and the objective lens 50 which is the light receiving part of the observation system 34. , the first illumination light L1 is irradiated onto the eye E from a direction inclined with respect to the observation axis LA. Therefore, in the illumination device 36I, the light emitting parts 363 are arranged at intervals such that the second illumination light L2 emitted from the left and right light emitting parts 363 disposed in the center of the illumination main body part 361 is partially or completely blocked. Even if the eye E is placed, there is almost no effect on the observation accuracy of the eye E, and as in Embodiment 1 or 2, it is possible to prevent the occurrence of shadows on the eyelids when observing the eye E. It is possible to more accurately observe the eye E under background illumination while suppressing the background illumination.

Further, the ophthalmologic apparatus 10I can also perform the processing and operations shown in the flowchart of FIG. As a result, when observing the eye E, it is possible to more accurately observe the eye E using the background illumination with less man-hours while suppressing the occurrence of shadows on the eyelids. The peripheral parts can be downsized.

Further, the ophthalmologic apparatus 10I may perform the processing and operation shown in the flowchart of FIG. Thereby, when observing the eye E to be examined, it is possible to reduce the size of the illumination device 36I while suppressing the occurrence of shadows on the eyelids.

(Embodiment 4)
Next, a fourth embodiment of the present disclosure will be described. 14 and 15 are front views of the ophthalmologic apparatus 10J (10J-1, 10J-2, 10J-3) of the fourth embodiment. In addition, in the description of the ophthalmological apparatus 10J, the same components as the ophthalmological apparatus 10A are given the same reference numerals, and the description thereof will be omitted or simplified. The ophthalmologic apparatus 10J is configured similarly to the ophthalmologic apparatus 10A, but includes an illumination device 36J instead of the illumination device 36A. The illumination device 36J includes a light emitting section 363J configured to be movable in the left-right direction Dx, which is the movable direction of the illumination system 32 when viewed from the eye E side. The light emitting section 363J is provided on the front side of the illumination main body section 361 (on the eye E side to be examined). The light emitting section 363J can be configured to be movable in the left-right direction Dx by being disposed in a power transmission mechanism using a rack gear and a pinion gear, for example, but any other power transmission mechanism can be applied.

It has an avoidance operation function that moves the light emitting section 363 according to the position of the illumination system 32 to avoid the second illumination light L2 emitted from the light emitting section 363 from being blocked by the illumination system 32. The avoidance operation function is performed under the control of the control device 40. Specifically, as shown in the ophthalmologic apparatus 10J-1, when the illumination system 32 is located approximately in the center of the ophthalmologic apparatus 10J in the left-right direction Dx, the control device 40 controls the light emitting unit 363J to be positioned on the right or left side of the illumination system 32. (indicated by the dashed line).

Further, as shown in the ophthalmologic apparatus 10J-2, when the illumination system 32 is located outside the center of the ophthalmologic apparatus 10J in the left-right direction Dx (for example, one of the light emitting parts in the illumination apparatus 36J 363J), move the light emitting unit 363J inward from the right (or left) position in the left-right direction Dx of the ophthalmological apparatus 10J-2 to avoid blocking the second illumination light L2 by the illumination system 32. I can do it. Note that the light emitting unit 363J is moved to the left when the illumination system 32 is moved to the right when viewed from the eye E side, or to the right when the illumination system 32 is moved to the left. Good too.

Furthermore, as shown in the ophthalmologic apparatus 10J-3, when the illumination system 32 is located outside the center of the ophthalmologic apparatus 10J in the left-right direction Dx, the control apparatus 40 controls the light emitting section 363J of the ophthalmologic apparatus 10J-3. The second illumination light L2 may be prevented from being blocked by the illumination system 32 by moving it to a substantially central position in the left-right direction Dx.

The ophthalmological apparatus 10J according to the fourth embodiment has a movable light emitting unit 363J, thereby avoiding the occurrence of shadows on the eyelids and preventing the illumination system 32 from blocking the second illumination light L2 as background illumination. While avoiding this, it is possible to accurately observe the eye E to be examined. Moreover, the ophthalmologic apparatus 10J can provide an ophthalmologic apparatus 10J (slit lamp microscope) that prevents the occurrence of flare and enables accurate observation of the eye E to be examined.

Note that the ophthalmologic apparatus 10J may have a plurality of light emitting sections 363J on the left and right sides of the illumination main body section 361 in the illumination device 36J. In this case, if the illumination system 32 is located outside the ophthalmological apparatus 10J, away from the center in the left-right direction Dx, all the light-emitting parts 363J may be moved to be located in the center as seen from the eye E side. Okay, if the illumination system 32 moves to the right when viewed from the eye E side, both of the light emitting parts 363J move to the left, or if the illumination system 32 moves to the left, the light emitting part 363J moves to the left. It may be controlled to move both to the right.

Although not shown, the control device 40 moves one or both of the light emitting sections 363J provided on the left and right sides of the illumination main body section 361 in the same direction as the moving direction of the illumination system 32, so that the second illumination light L2 The light may be prevented from being blocked by the illumination system 32. The control device 40 may move the light emitting section 363J to the right or left while positioning it on both the left and right sides of the illumination system 32 when viewed from the eye E side.

Further, the configuration in which the light emitting unit 363J is movable may be applied to the configurations of other ophthalmological apparatuses 10A to 10I.

Further, although an example has been described in which the infrared light source 363a and the visible light source 363b included in the light emitting section 363J are moved simultaneously, they may be moved individually.

As described above, the illumination system 32 is rotatably supported around the eye E while directing the irradiation direction of the first illumination light L1 toward the eye E, and the side opposite to the placement position of the eye E with respect to the illumination system 32. an observation system 34 provided at , the ophthalmic apparatus 10 in which the light emitting unit 363 is dimmed and the light source control method of the ophthalmic apparatus 10 have been described. Therefore, it is possible to provide the ophthalmologic apparatus 10 that enables more accurate observation of the eye E using background illumination.

The ophthalmological apparatus 10 also includes an illumination system 32 that is rotatably supported around the eye E while directing the irradiation direction of the first illumination light L1 toward the eye E, and a camera device 56. and an observation system 34 provided on the opposite side to the placement position of the eye E to be examined, and an imaging unit 561 in which the camera device 56 receives the first illumination light L1 reflected by the eye E to be examined and takes an image. , a configuration including a light emitting unit 363 for background illumination provided in the observation system 34 at a position below the eye E to be examined has been described. Therefore, it is possible to provide the ophthalmologic apparatus 10 and the camera apparatus 56 that have a background illumination function and an imaging function for the eye E with a simple configuration.

In addition, an illumination system 32 is rotatably supported around the eye E while directing the irradiation direction of the first illumination light L1 toward the eye E, and the illumination system 32 is located on the opposite side of the eye E from where the eye E is placed. and a light emitting unit 363 for background illumination provided in the observation system 34 at a position below the eye E to be examined, and the light emitting unit 363 provides illumination as seen from the eye E side A plurality of ophthalmological apparatuses 10 are provided in the movable direction of the system 32 and have been described. For this reason, the ophthalmological apparatus 10 can be configured to suppress the occurrence of shadows on the eyelids and more accurately observe the eye E while avoiding blocking of the second illumination light L2 of the background illumination by the illumination system 32. I can do it.

In addition, an illumination system 32 is rotatably supported around the eye E while directing the irradiation direction of the first illumination light L1 toward the eye E, and the illumination system 32 is located on the opposite side of the eye E from where the eye E is placed. an observation system 34 provided at The ophthalmologic apparatus 10 that has an avoidance operation function that prevents the second illumination light L2 emitted from the light emitting unit 363 from being blocked by the illumination system 32 has been described. In this way, the ophthalmological apparatus 10 avoids blocking of the second illumination light L2 of the background illumination by the illumination system 32, suppresses the occurrence of shadows on the eyelids, and enables more accurate observation of the eye E. and an illumination control method for the ophthalmological apparatus 10.

This concludes the description of the embodiments of the present disclosure, but aspects of the present disclosure are not limited to the configurations shown in each embodiment.

10 (10A to 10J) Ophthalmic apparatus 10A-1, 10A-2 Ophthalmic apparatus 10J-1 to 10J-3 Ophthalmic apparatus 12 Base 14 Face support section 14a Post 14b Chin rest 14c Forehead rest 16 Electric drive section 18 Movable table 20 Operation lever 20a Switch 22 First support member 24 Microscope support arm 24a Horizontal arm portion 24b Vertical arm portion 26 Rotation shaft 28 Second support member 30 Rotation shaft 32 (32A, 32C) Illumination system 32C1 Support column 32I Illumination system 34 (34A , 34B) Observation system 36 (36A, 36B, 36F to 36J) Illumination device 38 Light source operation section 40 Control device 44 Slit lamp 46 Deflection optical system 46C Illumination optical system 48, 48C Deflection section 50 Objective lens 52 Eyepiece lens 56 Camera device 56a Inserted part 61 Optical encoder 62 Magnetic encoder 63 Camera part 64 TOF sensor 361 Illumination body part 362 Arm part 362a Insertion part 363, 363J Light emitting part 363a Infrared light source 363b Visible light source 381 Slit lamp light source operation part 382 Infrared Light source operation unit 383 Visible light source operation unit 561 Imaging unit 562 Power supply circuit 563 Control circuit 611 Optical sensor 612 Slit disk 621 Magnetic sensor 622 Magnetic drum Dx Left-right direction Dy Front-back direction Dz Up-down direction E Eye to be examined L1 First illumination light L2 Second illumination Light L3 Tangent LA Observation axis O Origin θ Shading angle

Claims (5)

an illumination system rotatably supported around the eye to be examined while directing the irradiation direction of the first illumination light toward the eye to be examined;
an observation system provided on the opposite side of the illumination system from the placement position of the eye to be examined;
a light emitting unit for background illumination provided in the observation system at a position below the eye to be examined;
Equipped with
An ophthalmologic apparatus in which the light emitting section is dimmed and controlled according to the relative position of the illumination system and the light emitting section. The light emitting unit is provided in plurality in a movable direction of the illumination system as seen from the eye to be examined, and lights one side that is not shaded by the illumination system according to a relative position of the illumination system with respect to the observation system, and It has the function of turning off the other side that is blocked by the lighting system.
The ophthalmological device according to claim 1. The lighting system is
comprising a slit lamp that emits the first illumination light, and a deflection unit that deflects the first illumination light toward the eye to be examined;
When observing the eye to be examined, irradiating the eye to be examined with the first illumination light from a position away from an observation axis connecting the eye to be examined and a light receiving section of the observation system;
The ophthalmological device according to claim 2. A plurality of the light emitting units are provided in a movable direction of the illumination system as seen from the eye to be examined,
having a dimming control function that dims the light emitting unit so as to suppress a change in the amount of second illumination light reaching the eye to be examined from the light emitting unit regardless of the position of the illumination system;
The ophthalmologic device according to any one of claims 1 to 3. an illumination system rotatably supported around the eye to be examined while directing the irradiation direction of the first illumination light toward the eye to be examined;
An ophthalmological apparatus comprising: an observation system provided on the opposite side of the illumination system from the placement position of the eye to be examined; and a light emitting unit for background illumination provided in the observation system at a position below the eye to be examined. A lighting control method, comprising:
A lighting control method that controls dimming of the light emitting unit according to a relative position of the illumination system and the light emitting unit.

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