Ophthalmic equipment and camera equipment

Abstract

To provide an ophthalmologic apparatus and a camera device having a background illumination function and an imaging function of a subject eye with a simple constitution.SOLUTION: An ophthalmologic apparatus includes an illumination system supported rotatably around a subject eye, while directing a direction of radiation of illumination light toward the subject eye, and an observation system having a camera device and provided on the opposite side to an arrangement position of the subject eye with respect to the illumination system. The camera device includes an imaging part for receiving and imaging illumination light reflected by the subject eye, and light emission parts for background illumination, provided in the observation system, on lower positions than the subject eye.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to an ophthalmic device and a camera device.

Background Art

[0002] Conventionally, ophthalmic devices such as slit lamp microscopes having a light source for background illumination and a camera device have been proposed. Background illumination is used for confirming the position of the eye under examination irradiated with slit light during observation of the eye under examination, preventing white blooming during camera imaging of the eye under examination, and the like. For example, Patent Document 1 discloses an ophthalmic device (slit lamp microscope) in which background illumination is installed above the observation system and the camera device is on the examiner side opposite to the subject.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the ophthalmic device of Patent Document 1, since the illumination light is irradiated from above the eye under examination, a shadow may be formed in the observation region of the eye under examination by the eyelid. In addition, since the background illumination requires separate wiring of the power cable from the power cable of the ophthalmic device, the space required for installing the ophthalmic device is large.

[0005] An object of the present disclosure is to provide an ophthalmic device and a camera device having a background illumination function and an imaging function for an eye under examination with a simple configuration.

Means for Solving the Problems

[0006] To achieve the above-mentioned objectives, the ophthalmic apparatus according to this disclosure comprises an illumination system supported so as to be rotatable around the eye under examination while directing the direction of illumination light towards the eye under examination, and an observation system having a camera device and provided on the opposite side of the position of the eye under examination from the illumination system, wherein the camera device comprises an imaging unit that receives and captures illumination light reflected by the eye under examination, and a background illumination light-emitting unit provided in the observation system at a position below the eye under examination.

[0007] To achieve the above-mentioned objectives, the camera device according to this disclosure is configured to be attachable to the observation system of an ophthalmic device comprising: an illumination system supported so as to be rotatable around the eye while directing the direction of illumination light toward the eye under examination; and an observation system provided on the opposite side of the position of the eye under examination from the illumination system, and comprises an imaging unit that receives illumination light reflected by the eye under examination and takes an image; and a background illumination light-emitting unit provided in the observation system at a position below the eye under examination. [Effects of the Invention]

[0008] The ophthalmic device and camera device described herein can provide an ophthalmic device and camera device that have a background illumination function and an imaging function for the eye under examination in a simple configuration. [Brief explanation of the drawing]

[0009] [Figure 1] This is a side view of an ophthalmic device according to Embodiment 1 of this disclosure. [Figure 2] This is a perspective view from the patient's side of the illumination and observation systems of the ophthalmic apparatus of Embodiment 1. [Figure 3] This is a schematic plan view showing a wide camera device and a narrow camera device (modification 1 of Embodiment 1) each equipped with an illumination device. [Figure 4] This is a front view showing the illumination system of the ophthalmic apparatus of Embodiment 1 in a repositioned state. [Figure 5] This is a plan view showing the positional relationship between the eye under examination, the illumination system, and the light-emitting unit in the ophthalmic apparatus of Embodiment 1. [Figure 6]This is a control block diagram of an ophthalmic device. [Figure 7] This is an operation flowchart of the ophthalmic device of Embodiment 1. [Figure 8] This figure shows a modified example 2 of the ophthalmic apparatus of Embodiment 1. [Figure 9] This is an enlarged view of the rotating shaft to which an optical encoder is attached in the ophthalmic device of Embodiment 2, and the rotating shaft to which a magnetic encoder is attached in Modification 1 of Embodiment 2. [Figure 10] This is an operation flowchart of the ophthalmic device of Embodiment 2. [Figure 11] This is a front view illustrating ophthalmic devices of modified examples 2 and 3 of Embodiment 2. [Figure 12] This is a perspective view from the patient's side of the illumination and observation systems of the ophthalmic apparatus in Embodiment 3. [Figure 13] This is a front view illustrating an ophthalmic device of modified example 1 of Embodiment 3. [Figure 14] This is a front view of the ophthalmic apparatus of Embodiment 4. [Figure 15] This is a front view of the ophthalmic apparatus of Embodiment 4. [Modes for carrying out the invention]

[0010] (Embodiment 1) Hereinafter, Embodiment 1 of this disclosure will be described with reference to the drawings. In the following description, the ophthalmic device 10 will be described with the patient's side as the front and the opposite side (examiner's side) as the back, with the left side as seen from the patient's side as the left and the opposite side as the right. Furthermore, the ophthalmic device 10 will be described with the upper side of Figure 1 as the top and the opposite side as the bottom.

[0011] First, the configuration of the ophthalmic device 10 will be described. FIG. 1 is a side view of the ophthalmic device 10A (10). As shown in FIG. 1, the ophthalmic device 10A of the present embodiment is a so-called Zeiss type (Littman type) slit lamp microscope, and includes a base 12, a face support portion 14, an electric drive portion 16, a movable table 18, an operation lever 20, a first support member 22, a microscope support arm 24, a rotation axis 26, a second support member 28, a rotation axis 30, an illumination system 32, an observation system 34 (microscope portion), an illumination device 36 for background illumination, and a light source operation portion 38.

[0012] The base 12 can be placed on an examination table (not shown). The face support portion 14 is provided above the base 12. Further, the electric drive portion 16 and the light source operation portion 38 are provided on the upper surface of the base 12. Furthermore, the movable table 18 is held so as to be movable in the horizontal direction (front-rear direction Dy and left-right direction Dx). Here, the front-rear direction Dy is the front direction approaching the subject and the rear direction moving away from the subject, and the left-right direction Dx is the direction of the eye width of the subject.

[0013] The face support portion 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 forehead rest 14c provided at an upper end portion in the vertical direction of the pair of columns 14a. The face of the subject is supported by the face support portion 14 when the subject places the chin on the chin rest 14b and the forehead on the forehead rest 14c. Thereby, the position of the subject eye E is fixed. The subject eye E is fixed so as to be located substantially above the rotation axis 26 and the rotation axis 30. "

[0014] The electric drive portion 16 is a moving mechanism that moves the movable table 18 in the horizontal direction (left-right direction Dx and front-rear direction Dy) on the base 12. The operation lever 20 is provided at the rear end portion on the upper side and the rear direction side (examiner side) of the movable table 18. Further, the first support member 22 is provided on the upper surface of the movable table 18 so as to be movable (ascendable and descendable) in the vertical direction.

[0015] The electric drive unit 16 comprises 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, respectively. The electric drive unit 16 has the function of moving the movable table 18 in the horizontal direction (Dx, Dy) and the function of moving the first support member 22 in the vertical direction Dz in response to the operation of the operating lever 20. This makes it possible to adjust the position of the first support member 22 (illumination system 32 and observation system 34) relative to the eye E under examination.

[0016] 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 the vertical direction Dz, respectively. For example, when the operating lever 20 is tilted in the forward / backward direction Dy or the left / right direction Dx, the electric drive unit 16 moves the movable table 18 in the forward / backward direction Dy or the left / right direction Dx. Also, when the operating lever 20 is rotated around its axis, the electric drive unit 16 moves the first support member 22 in the vertical direction Dz. A switch 20a for use in photography, etc., is provided at the top of the operating lever 20.

[0017] A microscope support arm 24 is provided on the first support member 22. This microscope support arm 24 has a horizontal arm portion 24a and a vertical arm portion 24b, and is formed in a substantially L-shape when viewed from the side, as shown in Figure 1.

[0018] The front end (towards the eye E being examined) of the horizontal arm portion 24a is mounted on the first support member 22 so as to be able to rotate horizontally (rotate with the horizontal plane as the plane of rotation) via a pivot shaft 26 extending in the vertical direction Dz. The second support member 28 is mounted so as to be able to rotate horizontally via a pivot shaft 30 located on the extension of the pivot shaft 26 of the horizontal arm portion 24a (i.e., substantially coaxially).

[0019] The horizontal rotation of the microscope support arm 24 around the pivot axis 26, and the horizontal rotation of the second support member 28 around the pivot axis 30, may be performed manually by the examiner or electrically using an electric rotation mechanism (not shown).

[0020] An observation system 34, which is a microscope, is attached to the upper end of the vertical arm section 24b. In addition, an illumination system 32 is provided on the second support member 28.

[0021] The illumination system 32 comprises a slit lamp 44 that emits a 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 located above the slit lamp 44 and has a deflection unit 48 located above the slit lamp 44 that deflects the first illumination light L1 toward the eye under examination E. The deflection unit 48 is composed of 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 under examination E. As a result, the first illumination light L1 is irradiated toward the eye under examination E. In this embodiment, a prism is used as the deflection optical element. The slit lamp 44 and the deflection optical system 46 are not limited to those shown in Figure 1, and their shape, structure, and arrangement are not particularly limited as long as they are a configuration usable in a Zeiss-type slit lamp microscope.

[0022] The illumination system 32 rotates horizontally in conjunction with the second support member 28 around the pivot axis 30. The face support 14 fixes the face so that the eye E under examination is positioned approximately above the pivot axis 30. The illumination system 32 is supported so as to be rotatable around the eye E under examination while directing the irradiation direction of the first illumination light L1 toward the eye E under examination. This allows adjustment of the irradiation direction (incidence angle) of the first illumination light L1 toward the eye E under examination.

[0023] The observation system 34 is positioned on the opposite side of the illumination system 32 from the position of the eye under examination E. The observation system 34 is used to observe the eye under examination E, which is illuminated by the first illumination light L1 emitted from the illumination system 32 and various types of light emitted from the illumination device 36 described later. An objective lens 50, which is a light-receiving part, is provided at the front end of the observation system 34 on the front side (eye under examination E side), and an eyepiece lens 52 is provided at the rear end on the rear side (examiner side). In Figure 1, the symbol LA is the axis connecting the eye under examination E and the objective lens 50 (light-receiving part), and is the optical axis (observation axis) of the objective lens 50.

[0024] The observation system 34 guides the light received by the objective lens 50, for example, to the examiner side (the rear side of the ophthalmic device 10) by adjusting the magnification, and emits it from the eyepiece lens 52. Furthermore, the observation system 34 can be rotated horizontally in conjunction with the microscope support arm 24 around the pivot axis 26. Therefore, the observation system 34 can adjust the observation direction of the eye under examination E.

[0025] Furthermore, the observation system 34 of this embodiment includes a camera device 56 that images the eye under examination 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 under examination E (or objective lens 50). The camera device 56 is, for example, a digital camera. The camera device 56 is formed in an elongated shape and is detachably mounted to the housing of the observation system 34 (vertical arm portion 24b in the example of Figure 1) with its long axis facing the vertical direction Dz.

[0026] The camera device 56 includes an imaging unit 561 (not shown) that receives and images the first illumination light L1 reflected by the eye E under examination, a power supply circuit 562, and a control circuit 563. The imaging unit 561 is an image sensor such as a CMOS image sensor or a CCD image sensor. The first illumination light L1 that enters the camera device 56 through the objective lens 50 is partially guided to the imaging unit 561 by a half mirror or the like for imaging. The other part of the first illumination light L1 is guided to the eyepiece lens 52. 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 ophthalmic device 10 to each functional unit, or it may be configured to include a battery, transformer, or power generation circuit.

[0027] The illumination device 36 is installed in the observation system 34, which is located below the eye E under examination. Figure 3 shows a schematic plan view of the observation system 34A (34) in which the illumination device 36A is attached to the wide camera device 56 of this embodiment. The ophthalmic device 10A in Figure 1 has an observation system 34A. The illumination device 36A of the observation system 34A has a long illumination body 361 on which multiple light-emitting units 363 (details described later) for background illumination are provided, and arm portions 362 that extend rearward from both ends of the illumination body 361. The illumination device 36A is formed in a roughly U-shape in plan view, with the illumination body 361 and the arm portions 362 connected at roughly right angles.

[0028] In this embodiment, the camera device 56 in the observation system 34A has the aforementioned imaging unit 561 and light-emitting unit 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 by the arm portion 362 of the U-shaped illumination body portion 361, which sandwiches the vertical arm portion 24b of the observation system 34A. The camera device 56 is wider than the vertical arm portion 24b in the direction of movement of the illumination system 32 as viewed from the eye E side, and is formed to be insertable and detachable from the eye E side. In the example of the observation system 34A, the illumination device 36A is fixed to the camera device 56 by connecting the insertion portion 362a (e.g., jack) provided at the end of the arm portion 362 to the insertion portion 56a (e.g., receptacle) provided on the camera device 56. The lower surface of the lighting body 361 may be supported by a support projection that protrudes forward from the front side of the vertical arm 24b.

[0029] Furthermore, the lighting device 36A can receive power from the power supply circuit 562 of the camera device 56 via a wiring cable running through the inside of the arm portion 362. In addition, the control circuit of the lighting device 36 may be shared with the circuit board of the control circuit 563 of the camera device 56, or it may be provided on a separate circuit board within the housing of the camera device 56, distinct from the circuit board of the control circuit 563 for the camera device 56. By housing the circuit board of the control circuit of the lighting device 36 within the housing of the camera device 56, the overall size of the lighting device 36 and the camera device 56 can be reduced.

[0030] The light-emitting unit 363 has a light source capable of selectively emitting multiple different types of light (for example, three types of light: visible light, infrared light, and excitation light) to the eye E under examination. In this embodiment, as shown in Figure 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 body 361.

[0031] The light source control unit 38 is located on the upper surface of the base 12, on the rear side (examiner side). As will be described in more detail later, this light source control unit 38 is used by the examiner to turn the slit lamp 44 on or off and adjust its light intensity, as well as to turn the light-emitting unit 363 on or off and adjust its light intensity.

[0032] Figure 4 is a front view of the illumination system 32 and observation system 34 as seen from the subject's (examined eye E) side. Figure 4 shows ophthalmic devices 10A and 10B, which have different relative positions of the illumination system 32 with respect to the observation system 34. Multiple light-emitting units 363 are provided in the left-right direction Dx, which is the movable direction of the illumination system 32 as seen from the subject's eye E side. In other words, the illumination system 32 is configured to be movable in the direction of the arrangement of the light-emitting units 363. In this embodiment, the light-emitting unit 363 has one infrared light source 363a and one visible light source 363b of the same type of light source arranged at both the right and left ends when viewed from the front. The visible light source 363b is positioned above the infrared light source 363a.

[0033] Figure 5 is a plan view of the illumination system 32 and the observation system 34. In a plan view from the direction of the rotation axis 30 of the illumination system 32, the light-emitting unit 363 is positioned outside the light-shielding angle θ formed by the two tangents L3 of the illumination system 32 when it is located on the observation axis LA connecting the origin O, which is the position of the eye under examination (a reference position for the eye under examination, such as the approximate center position of the eye under examination E or the position of the anterior segment of the eye under examination), to the light-receiving unit 50 of the observation system 34, which is the objective lens 50. Therefore, as shown in Figure 5, when the illumination system 32 is positioned approximately on the observation axis LA, the eye under examination E can receive illumination from the second illumination light L2 as background illumination from both light-emitting units 363 located at both ends of the illumination device 36 in the left-right direction Dx.

[0034] Figure 6 is a schematic diagram of the light source control unit 38 and control device 40 of the ophthalmic device 10A(10). The light source control unit 38 comprises a slit lamp light source control unit 381, an infrared light source control unit 382, ​​and a visible light source control unit 383. The ophthalmic device 10A also includes a storage device (or storage medium, also referred to as a storage medium, not shown) that stores control programs for executing each function of the ophthalmic device 10A.

[0035] The slit lamp light source control unit 381 receives requests to turn the slit lamp 44 on or off, and to adjust the light intensity of the first illumination light (slit light) emitted from the slit lamp 44. The infrared light source control unit 382 receives requests to turn the infrared light source 363a on or off, and to adjust the light intensity of the infrared light emitted from the infrared light source 363a. The visible light source control unit 383 receives requests to turn the visible light source 363b on or off, and to adjust the light intensity of the visible light emitted from the visible light source 363b.

[0036] The control device 40 is located, for example, within the movable table 18 (or outside the ophthalmic device 10A) and comprehensively controls the operation of each part of the ophthalmic device 10A. This control device 40 is an arithmetic unit, such as a personal computer, and is equipped with an arithmetic circuit composed of various processors and memory. Various 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), CPLDs (Complex Programmable Logic Devices), and FPGAs (Field Programmable Gate Arrays)]. The various functions of the control device 40 may be implemented by a single processor, or by multiple processors of the same or different types.

[0037] The control device 40 can drive the electric drive unit 16 to move the movable table 18 in the forward / backward direction Dy or the left / right direction Dx in response to the tilting operation of the operating lever 20 in the forward / backward direction Dy or the left / right direction Dx, and can also drive the electric drive unit 16 to move the first support member 22 in the up / down direction Dz in response to the rotation operation of the operating lever 20 around its axis.

[0038] Furthermore, the control device 40 controls the on / off switching of the slit lamp 44, infrared light source 363a, and visible light source 363b, as well as the adjustment of the light intensity emitted from each light source, in response to on / off and light intensity adjustment inputs to the light source operation unit 38. This allows the examiner to easily switch the light source on or off in response to the on / off operation, and adjust the light intensity emitted from the light source in response to the light intensity adjustment operation. For this reason, the control device 40 functions as a light source control unit of the present invention. This makes it easier to perform light source switching and light intensity adjustment compared to when they are performed manually (for example, by switching filters).

[0039] Returning to Figure 4, the ophthalmic apparatus 10A-1 (10A) shows a state in which a wide illumination device 36A is attached to the observation system 34 in the left-right direction Dx, and the illumination system 32 is positioned approximately on the observation axis LA. In the ophthalmic 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 under examination E can receive illumination from the second illumination light L2 from the light-emitting units 363 at both ends.

[0040] Furthermore, as in the ophthalmic device 10A-2(10A) in Figure 4, when the illumination system 32 moves relative to the observation system 34, one of the left or right light-emitting units 363 may be blocked by the illumination system 32. However, since the ophthalmic device 10A-2(10A) of this embodiment has multiple light-emitting units 363 in the left-right direction Dx, the second illumination light L2 emitted from at least some of the light-emitting units 363 (the right light-emitting unit 363 in Figure 4) can be irradiated onto the eye E under examination regardless of the position of the illumination system 32.

[0041] Here, an example of an operation flowchart for the ophthalmic device 10A will be explained with reference to Figure 7. In the flowchart of Figure 7, steps S08 and S09 describe an example in which the ophthalmic device 10A is operated semi-manually (or semi-automatically by the control device 40) using the operating lever 20 or the light source operating unit 38, etc., but other processes may be performed manually or automatically by the control device 40.

[0042] First, in step S01, the subject rests their chin on the chin rest 14b to support their face and fixes the position of the subject's eye E. In step S02, the examiner or other user turns on the power to the lighting system 32 (switches it to "ON") by operating the control lever 20 or the like.

[0043] In step S03, the user adjusts the position and angle of the illumination system 32 by operating the operating lever 20, etc., to match the position of the eye E under examination. In step S04, the user adjusts the alignment of the ophthalmic device 10A. The user also adjusts the slit width of the first illumination light L1 that is irradiated onto the eye E under examination in step S05 by operating the light source operating unit 38, etc., and adjusts the brightness of the first illumination light L1, etc., in step S06.

[0044] In step S07, the user confirms the emission angle of the first illumination light L1 from the illumination system 32 to the eye E under examination with respect to the observation axis LA, and the ophthalmic device 10A adjusts the position of the illumination system 32 to any position (i.e., any angle with respect to the observation axis LA) through user operation.

[0045] In step S08, the control device 40 turns on (or switches to "ON") any background lighting light source based on the user's operation of the light source operation unit 38. Note that whether to turn on the infrared light source 363a or the visible light source 363b of the light-emitting unit 363 may be set manually by the user or automatically determined by the control device 40.

[0046] In step S09, the control device 40 adjusts the brightness of the background light source that has been turned on. The ophthalmic apparatus 10A of this embodiment has a function to adjust the brightness of the light-emitting unit 363 according to the relative position of the illumination system 32 and the light-emitting unit 363. The brightness adjustment function is performed by the user via the light source operation unit 38 while checking the image of the eye E under examination using, for example, an eyepiece 52 (see Figure 1) or an external monitor (not shown).

[0047] The control device 40 can turn on the left and right light-emitting units 363 when the illumination system 32 is positioned on the observation axis LA side and the second illumination light L2 emitted from the left and right light-emitting units 363 can be irradiated onto the eye E under examination (see ophthalmic device 10A-1 in Figure 4) by the user's operation of the light source operation unit 38.

[0048] On the other hand, when observing the eye E under examination, the illumination system 32 primarily irradiates the eye E with the first illumination light L1 from a position off (away from) the observation axis LA connecting the eye E under examination and the objective lens 50, which is the light-receiving part of the observation system 34, and from a direction inclined with respect to the observation axis LA. Therefore, if the illumination system 32 is located to the left (or right) of the observation axis LA and the second illumination light L2 emitted from some of the light-emitting parts 363 is blocked (see ophthalmic device 10A-2 in Figure 4), the light-emitting parts 363 that block the second illumination light L2 are turned off. This reduces the unnecessary power consumption of the ophthalmic device 10A.

[0049] In step S10, the camera device 56 is operated by input to the operating lever 20, and an image of the eye E under examination is captured. The captured image is stored in the memory device of the ophthalmic device 10A.

[0050] The ophthalmic apparatus 10A of this embodiment has been described above. In conventional ophthalmic apparatuses exemplified in Patent Document 1, it was necessary to operate a lighting adjustment means located away from the operator, such as an ophthalmologist or nurse, to turn the background lighting power ON or OFF and control dimming, which made operation cumbersome. Furthermore, the power supply for the lighting device for background lighting was sometimes supplied through separate wiring from the power supply used for other components of the ophthalmic apparatus. As a result, two sets of wiring were drawn from the ophthalmic apparatus, requiring space for installation and incurring wiring costs, which was not economical.

[0051] In this embodiment, the ophthalmic apparatus 10A is configured such that the illumination device 36A is connected to the camera device 56, allowing the user to adjust the background illumination at their fingertips. Furthermore, the power supply for the second illumination light L2 can be shared with the power supply for the camera device 56, thus enabling reduced wiring and space savings. In conventional configurations, the illumination device for background illumination was mounted on top of the observation system, resulting in a relatively high position at the top of the observation system's housing. This sometimes made it difficult to mount equipment such as an applanation tonometer. However, in the ophthalmic apparatus 10A, the control circuits and power supply circuit boards for the illumination device 36 and the camera device 56 can be shared, allowing for cost reduction, reduced wiring, and miniaturization (space saving) while still providing illumination and imaging functions.

[0052] In this embodiment, the illumination device 36A is described as being removable from the side of the eye being examined E, but the embodiment is not limited to this. For example, the illumination device 36A may be configured to be removable from the examiner's side relative to the camera device 56, from the right or left side of the ophthalmic device 10, from the top side, or from any other direction.

[0053] (Modification 1 of Embodiment 1) As explained in the observation system 34A in Figure 3, in this embodiment, the illumination device 36 is configured to be insertable and removable from the eye E side to the camera device 56, which is wider than the vertical arm portion 24b. However, as shown in the observation system 34B in Figure 3, the width of the camera device 56 may be narrower than the width of the illumination device 36B, and the insertion portion 362a may be connected from the insertion portion 56a side formed on the left and right sides of the camera device 56. When the illumination device 36B is connected to the camera device 56, it is possible to prevent the illumination device 36B from unintentionally falling off.

[0054] (Modification 2 of Embodiment 1) Figure 8 is a front view of an ophthalmic apparatus 10C(10) having an illumination system 32C(32) that is taller than the observation system 34 shown in Figure 1. In the description of the ophthalmic apparatus 10C, components similar to those of the ophthalmic apparatus 10A are denoted by the same reference numerals, and their descriptions are omitted or simplified. The ophthalmic apparatus 10C is equipped with a so-called tower-type illumination system 32C instead of the illumination system 32A of Embodiment 1. The illumination system 32C comprises two support columns 32C1 that are spaced apart in the front view of Figure 8 so as to create an opening around the observation axis LA. The lower part of each support column 32C1 is supported by a second support member 28 shown in Figure 1 (details are not shown), and is rotatably connected by a pivot shaft 30. A slit lamp 44 and an illumination optical system 46C are arranged on the upper part of the support columns 32C1. The illumination optical system 46C of the illumination system 32C is located below the slit lamp 44 and has a deflection section 48C located below the slit lamp 44 that deflects the first illumination light L1 towards the eye under examination E. The deflection section 48C is supported by a second support member 28 of the illumination system 32C (see also Figure 1), but a detailed illustration of the support structure is omitted. The deflection section 48C, which has a similar function to the deflection section 48 described above, is, for example, a mirror (reflector) or a prism, and deflects (guides) the first illumination light L1 emitted from the slit lamp 44 toward the eye under examination E.

[0055] Figure 5 also shows the positional relationship between the support column 32C1 of the ophthalmic device 10C (shown as a dashed line), the eye under examination E, and the light-emitting unit 363. In a plan view from the direction of the rotation axis 30 of the illumination system 32(32C), the light-emitting unit 363 is positioned outside the light-shielding angle θ formed by the two tangents L3 of the illumination system 32(32C) when it is located on the observation axis LA, which connects the origin O, where the eye under examination E is located, to the objective lens 50, which is the light-receiving part of the observation system 34. Therefore, when the tower-type illumination system 32C is located on the observation axis LA, the eye under examination E can receive illumination from the second illumination light L2 as background illumination from both of the light-emitting units 363 located at both ends Dx in the left-right direction of the illumination device 36A.

[0056] In the case of an ophthalmic apparatus in which a light-emitting unit for background illumination is installed at the top of the observation system, if a tower-type illumination system (for example, illumination system 32C) is used, it is conceivable that, depending on the rotation position of the illumination system, the illumination light emitted from the light-emitting unit may be blocked by the illumination system, preventing sufficient illumination of the eye under examination E. However, the ophthalmic apparatus 10C equipped with the illumination device 36A of this embodiment, even when using a tower-type illumination system 32C, can avoid blocking of the background illumination light by the illumination system, suppress the occurrence of shadows on the eyelid of the eye under examination E, and irradiate the eye under examination E with a second illumination light L2 as background illumination from one of the light-emitting units 363, enabling more accurate observation of the eye under examination.

[0057] (Embodiment 2) Next, Embodiment 2 of the present disclosure will be described. The ophthalmic apparatus 10D of Embodiment 2 automatically controls the dimming of the second illumination light emitted from the background illumination light source. Figure 9 is an enlarged view of each of the pivot shafts 26 and 30 of the ophthalmic apparatus 10D, which is equipped with a pivot shaft 26 and 30 to which an optical encoder 61 (position detection unit) is attached, and the ophthalmic apparatus 10E, which is equipped with a pivot shaft 26 and 30 to which a magnetic encoder 62 (position detection unit) is attached. Embodiment 2 will describe the ophthalmic apparatus 10D. In the description of the ophthalmic apparatus 10D, components similar to those of the ophthalmic apparatus 10A will be denoted by the same reference numerals, and their descriptions will be omitted or simplified.

[0058] The ophthalmic device 10D has a configuration similar to that of the ophthalmic device 10A shown in Figure 1 for most of its components. The ophthalmic device 10D is equipped with optical encoders 61 on the rotating shafts 26 and 30. The optical encoder 61 is, for example, a rotary encoder and is equipped with a light sensor 611 and a slit disc 612. The slit disc 612 is formed in a flat shape and is arranged coaxially with the rotating shafts 26 and 30, and has multiple slits (openings or notches) intermittently arranged around its outer edge in the circumferential direction. The light sensor 611 is a light-emitting and light-receiving sensor in which the light-emitting part and the light-receiving part are formed as an integrated or separate unit. The light sensor 611 irradiates light onto the arrangement of the slit disc 612 and receives the reflected or transmitted light. The control device 40 of the ophthalmic device 10D (see Figure 6) can receive a light detection signal from the light sensor 611 and detect the rotation angle of the rotating shafts 26 and 30. Therefore, the control device 40 can detect the rotation angle of the illumination system 32 relative to the observation system 34 using the optical encoder 61.

[0059] Next, an example of an operation flowchart for the ophthalmic device 10 will be explained with reference to Figure 10. In the flowchart of Figure 10, the processes or operations in steps S21, S22, S23, S24, S25, and S26 are the same as the processes or operations in steps S01, S02, S03, S04, S05, and S06, respectively. Also, the process in step S29 is the same as the process in step S10.

[0060] In step S27, the ophthalmic device 10D turns on (or switches to "ON") the power to the background illumination light source in response to the user's operation of the light source control unit 38. The ophthalmic device 10D also has a function to dim the light-emitting unit 363 according to the relative position of the illumination system 32 and the light-emitting unit 363. The dimming control includes switching the emission of the second illumination light L2 by the light-emitting unit 363 ON or OFF, and adjusting the light intensity. As an example of dimming control, the control device 40 detects the relative position (rotation angle) of the illumination system 32 with respect to the observation system 34, which was adjusted in step S23, using the optical encoder 61. The control device 40 has a function to automatically select and turn on the light-emitting unit 363, which is the background illumination light source of the ophthalmic device 10A shown in Figure 4, etc., so that one side that is not blocked by the illumination system 32 (the side that is not in the shadow of the illumination system 32) is lit, and the other side that is blocked by the illumination system 32 is turned off. A second illumination light L2 (see Figure 1) is emitted from the illuminated light-emitting unit 363.

[0061] The ophthalmic device 10D has correspondence information in its storage device that associates the rotation angles of the illumination system 32 and the observation system 34 with shading information indicating the extent to which the second illumination light L2 emitted from each light-emitting unit 363 reaches the eye E under examination. Alternatively, the storage device stores predetermined angles from the above rotation angles as threshold information for turning the light-emitting unit 363 on or off. The control device 40 can control the light-emitting unit 363 to turn on, for example, as shown in the ophthalmic device 10A-1 in Figure 4, if the entire light-emitting unit 363 is not blocked by the illumination system 32 when viewed from the eye E side, or if a part of the light-emitting unit 363 (for example, 80% or half of the whole) is not blocked by the illumination system 32 when viewed from the eye E side.

[0062] Furthermore, whether to light up either the infrared light source 363a or the visible light source 363b of the light-emitting unit 363 may be set manually by the user, or it may be set automatically by the control device 40.

[0063] In step S28, the control device 40 dims the light-emitting units 363 (light sources) for background illumination that have been turned on. As described above, multiple light-emitting units 363 are provided in the movable direction of the illumination system 32 as viewed from the eye E side of the eye under examination. The control device 40 has a dimming control function that dims the light-emitting units 363 so as to suppress changes in the amount of light of the second illumination light L2 that reaches the eye E from the light-emitting units 363, regardless of the position of the illumination system 32. Specifically, the control device 40 controls the output of the light-emitting units 363 so that the amount of light is approximately the same when one of the light-emitting units 363 that is not blocked by the illumination system 32 when the second illumination light L2 is emitted is turned on, as in the ophthalmic device 10A-2 in Figure 4, and when both of the light-emitting units 363 that are not blocked by the illumination system 32 when the second illumination light L2 is emitted are turned on, as in the ophthalmic device 10A-1. In other words, the control device 40 controls the output of the second illumination light L2 when there are many light-emitting units 363 that are lit, and increases the output of the second illumination light L2 when there are few light-emitting units 363 that are lit. In this way, the control device 40 controls the amount of light 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 under examination, thereby suppressing changes in brightness around the observation area, etc., regardless of the position of the illumination system 32 when the examiner is observing or when imaging is performed in step S29.

[0064] In this embodiment as well, when observing the eye E under examination, the illumination system 32 primarily irradiates the eye E under examination with the first illumination light L1 from a position off (away from) the observation axis LA connecting the eye E under examination and the objective lens 50, which is the light-receiving part of the observation system 34, and from a direction inclined with respect to the observation axis LA. Therefore, as shown in the ophthalmic device 10A-2 in Figure 4, if the illumination system 32 is moved to the left (or right) of the observation axis LA and the second illumination light L2 emitted from some of the light-emitting parts 363 is blocked, the light-emitting parts 363 that cannot irradiate the eye E under examination with the second illumination light L2 are turned off. This makes it possible to suppress unnecessary power consumption of the ophthalmic device 10.

[0065] As described above, the ophthalmic device 10D of Embodiment 2 is configured to control the light-emitting unit 363 so as to suppress changes in the amount of second illumination light L2 reaching the eye E under examination from the light-emitting unit 363 regardless of the position of the illumination system 32. Therefore, when observing the eye E under examination, it is possible to observe the eye E under examination more accurately with background illumination using simple operation while suppressing the occurrence of shadows on the eyelid.

[0066] (Modification 1 of Embodiment 2) The ophthalmic device 10D may also be an ophthalmic device 10E equipped with a magnetic encoder 62 instead of an optical encoder 61. The magnetic encoder 62 comprises, for example, a magnetic sensor 621 (e.g., a Hall element) fixed to the pivot shaft 30 and a magnetic drum 622 which is a permanent magnet arranged in a ring around the pivot shaft 26, and outputs a detection signal corresponding to the rotation angle of the pivot shaft 30 with respect to the pivot shaft 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 obtained from the magnetic encoder 62. The ophthalmic device 10E can operate in the same way as the ophthalmic device 10D, according to the flowchart in Figure 10.

[0067] Furthermore, the ophthalmic apparatus 10 may use 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 an angle detection device for the illumination system 32 relative to the observation system 34.

[0068] (Modifications 2 and 3 of Embodiment 2) Next, modified examples 2 and 3 of Embodiment 2 will be described. Figure 11 is a front view illustrating the ophthalmic apparatus 10F(10) of Modified Example 2 and the ophthalmic apparatus 10G(10) of Modified Example 3 in Embodiment 2. In the description of the ophthalmic apparatus 10F and the ophthalmic apparatus 10G, components similar to those of the ophthalmic apparatus 10A will be denoted by the same reference numerals, and their descriptions will be omitted or simplified.

[0069] The illumination device 36F of the ophthalmic device 10F is equipped with a camera unit 63 located approximately in the center of the left-right direction Dx of the illumination main unit 361. The ophthalmic device 10G can image the illumination system 32 side with the camera unit 63, and the control device 40 can detect the position of the illumination system 32 from the acquired image. The illumination device 36G has correspondence information in its storage device that associates the rotation angle of the illumination system 32 and the observation system 34 with light-shielding information indicating how much of the second illumination light L2 emitted from each light-emitting unit 363 reaches the eye E under examination. Alternatively, the storage device stores a predetermined angle from the above rotation angle as threshold information for turning the light-emitting unit 363 on or off.

[0070] The control device 40 of the ophthalmic device 10F can determine the rotation angle (relative position) of the illumination system 32 relative to the observation system 34 based on the image data acquired by the camera unit 63. Furthermore, the ophthalmic device 10F can operate according to the flowchart in Figure 10, similar to the ophthalmic device 10D.

[0071] The illumination device 36G of the ophthalmic device 10G is equipped with a TOF (Time of Flight) sensor 64 located approximately in the center of the left-right direction Dx of the illumination main unit 361. The ophthalmic device 10G can detect the presence or absence of the illumination system 32 using the TOF sensor 64. The illumination device 36G may also have correspondence information in its storage device that associates the rotation angle of the illumination system 32 and the observation system 34 with light-shielding information indicating the extent to which the second illumination light L2 emitted from each light-emitting unit 363 reaches the eye E under examination, or it may store a predetermined angle from the above rotation angle as threshold information for turning the light-emitting unit 363 on or off.

[0072] The control device 40 of the ophthalmic device 10G can determine the rotation angle (relative position) of the illumination system 32 relative to the observation system 34 based on data regarding the position information of the illumination system 32 acquired from the TOF sensor 64. Furthermore, the ophthalmic device 10G can operate according to the flowchart in Figure 10, similar to the ophthalmic device 10D.

[0073] (Embodiment 3) Next, Embodiment 3 will be described. Figure 12 is a perspective view of the illumination system 32 and observation system 34 of the ophthalmic device 10H(10) of this embodiment, as seen from the eye E side. In the description of the ophthalmic device 10H, components similar to those in the ophthalmic device 10A will be given the same reference numerals, and their descriptions will be omitted or simplified.

[0074] The ophthalmic device 10H is equipped with an illumination device 36H instead of the illumination device 36A in the ophthalmic device 10A. Compared to the illumination device 36A, the illumination device 36H has a shorter left-right width for the illumination body 361 and a narrower spacing between the arm portions 362. In the ophthalmic device 10H using slit light, when observing the eye under examination E, the illumination system 32 mainly irradiates the eye under examination E with first illumination light L1 from a position off (away from) the observation axis LA connecting the eye under examination E and the objective lens 50, which is the light-receiving part of the observation system 34, and from a direction inclined with respect to the observation axis LA. Therefore, as shown in the front view of the area around the observation axis LA in Figure 12, even if the illumination system 32 is positioned approximately on the observation axis LA and the light-emitting unit 363 is arranged in such a way that some (or all) of the light emitted from the light-emitting unit 363 is blocked, the illumination device 36H can detect the position of the illumination system 32 where the second illumination light L2 is blocked by the illumination system 32, and control the dimming of the light-emitting unit 363 according to the relative position of the illumination system 32 and the light-emitting unit 363, thereby preventing the second illumination light L2 from being blocked when observing the eye under examination E. Thus, similar to Embodiment 1 or Embodiment 2, when observing the eye under examination E, it is possible to more accurately observe the eye under examination E with background illumination while suppressing the occurrence of shadows on the eyelid. In addition, since the left-right width of the illumination device 36H is made shorter, the ophthalmic device 10H can be made more compact overall.

[0075] Furthermore, the ophthalmic device 10H can perform the processing and operation shown in the flowchart of Figure 10. This allows for more accurate observation of the eye E with background illumination with fewer steps, while suppressing the occurrence of shadows on the eyelid during observation of the eye E under examination. In addition, it allows for miniaturization, mainly around the illumination device 36H.

[0076] Furthermore, the ophthalmic device 10H may perform the processing and operation shown in the flowchart of Figure 7. This allows for miniaturization of the illumination device 36H while suppressing the generation of shadows on the eyelids during observation of the eye under examination E.

[0077] (Modification 1 of Embodiment 3) Next, a modification 1 of Embodiment 3 will be described. Figure 13 is a front view illustrating the ophthalmic apparatus 10I(10) of modification 1 in Embodiment 3. The ophthalmic apparatus 10I is equipped with a lighting device 36I instead of the lighting device 36A in the ophthalmic apparatus 10A. In the description of the ophthalmic apparatus 10I, components similar to those in the ophthalmic apparatus 10A will be given the same reference numerals, and their descriptions will be omitted or simplified.

[0078] The illumination device 36I of the ophthalmic device 10I includes a plurality of light-emitting units 363 located approximately in the center of the left-right direction Dx in the illumination main body 361.

[0079] Furthermore, the rotation angle of the illumination system 32 in the ophthalmic device 10I can be determined by the control device 40 using any configuration such as the aforementioned encoder (e.g., optical encoder 61, magnetic encoder 62, etc.), camera unit 63, and TOF sensor 64. When observing the eye under examination E, the illumination system 32I mainly irradiates the eye under examination E with first illumination light L1 from a position off (away from) the observation axis LA connecting the eye under examination E and the objective lens 50, which is the light-receiving part of the observation system 34, and from a direction inclined with respect to the observation axis LA. Therefore, even if the light-emitting units 363 of the illumination device 36I are arranged at an interval such that the second illumination light L2 emitted from the left and right light-emitting units 363 located in the center of the illumination main unit 361 is partially or completely blocked, there is virtually no effect on the observation accuracy of the eye under examination E. Similar to Embodiment 1 or Embodiment 2, when observing the eye under examination E, it is possible to observe the eye under examination E more accurately with background illumination while suppressing the occurrence of shadows on the eyelid.

[0080] Furthermore, the ophthalmic device 10I can also perform the processing and operation shown in the flowchart of Figure 10. This allows for more accurate observation of the eye E with background illumination with fewer steps, while suppressing the occurrence of shadows on the eyelid during observation of the eye E under examination. In addition, it allows for miniaturization, mainly around the illumination device 36I.

[0081] Furthermore, the ophthalmic device 10I may perform the processing and operation shown in the flowchart of Figure 7. This allows for miniaturization of the illumination device 36I while suppressing the generation of shadows on the eyelids during observation of the eye under examination E.

[0082] (Embodiment 4) Next, Embodiment 4 of the present disclosure will be described. Figures 14 and 15 are front views of the ophthalmic apparatus 10J (10J-1, 10J-2, 10J-3) of Embodiment 4. In the description of the ophthalmic apparatus 10J, components similar to those of the ophthalmic apparatus 10A will be denoted by the same reference numerals, and their descriptions will be omitted or simplified. The ophthalmic apparatus 10J is configured similarly to the ophthalmic apparatus 10A, but has an illumination device 36J instead of an illumination device 36A. The illumination device 36J has a light-emitting unit 363J configured to be movable in the left-right direction Dx, which is the movable direction of the illumination system 32 as viewed from the eye E side. The light-emitting unit 363J is provided on the front side (eye E side) of the illumination body 361. The light-emitting unit 363J can be configured to be movable in the left-right direction Dx by being arranged in a power transmission mechanism using a rack gear and a pinion gear, for example, but any other power transmission mechanism can be applied.

[0083] The device has an avoidance function that moves the light-emitting unit 363 according to the position of the illumination system 32, thereby preventing the second illumination light L2 emitted from the light-emitting unit 363 from being blocked by the illumination system 32. The avoidance function is controlled by the control device 40. Specifically, as shown in the ophthalmic device 10J-1, when the illumination system 32 is located approximately in the center in the left-right direction Dx of the ophthalmic device 10J, the control device 40 positions (moves) the light-emitting unit 363J to the right or left (indicated by the dashed line) of the illumination system 32.

[0084] Furthermore, as shown in the ophthalmic device 10J-2, if the illumination system 32 is located on the outside, away from the center in the left-right direction Dx of the ophthalmic device 10J (for example, one of the light-emitting units 363J in the illumination device 36J), the control device 40 can move the light-emitting unit 363J inward from its right (or left) position in the left-right direction Dx of the ophthalmic device 10J-2 to prevent the second illumination light L2 from being blocked by the illumination system 32. Note that the light-emitting unit 363J may be moved to the left if the illumination system 32 moves to the right when viewed from the eye E side, or to the right if the illumination system 32 moves to the left.

[0085] Furthermore, as shown in the ophthalmic device 10J-3, if the illumination system 32 is located on the outside away from the center in the left-right direction Dx of the ophthalmic device 10J, the control device 40 may move the light-emitting unit 363J to approximately the center position in the left-right direction Dx of the ophthalmic device 10J-3 to avoid the second illumination light L2 being blocked by the illumination system 32.

[0086] The ophthalmic device 10J according to Embodiment 4 has a movable light-emitting unit 363J, thereby avoiding the occurrence of shadows on the eyelids and preventing the shielding of the second illumination light L2 as background illumination by the illumination system 32, while enabling accurate observation of the eye under examination E. Furthermore, the ophthalmic device 10J can provide an ophthalmic device 10J (slit-lamp microscope) that prevents the occurrence of flare and enables accurate observation of the eye under examination E.

[0087] Furthermore, the ophthalmic device 10J may have multiple light-emitting units 363J on the left and right sides of the illumination main unit 361 of the illumination device 36J. In this case, if the illumination system 32 is located on the outside away from the center in the left-right direction Dx of the ophthalmic device 10J, all light-emitting units 363J may be moved to the center as viewed from the side of the eye being examined E, or if the illumination system 32 moves to the right as viewed from the side of the eye being examined E, both light-emitting units 363J may be moved to the left, or if the illumination system 32 moves to the left, both light-emitting units 363J may be moved to the right.

[0088] Furthermore, although not shown in the figures, the control device 40 may move one or both of the light-emitting units 363J, which are provided on the left and right sides of the illumination body 361, in the same direction as the movement of the illumination system 32, in order to prevent the second illumination light L2 from being blocked by the illumination system 32. The control device 40 may also move the light-emitting units 363J to the right or left while positioning them on both the left and right sides of the illumination system 32 as viewed from the eye E side of the eye being examined.

[0089] Furthermore, the configuration that makes the light-emitting unit 363J movable may be applied to the configurations of other ophthalmic devices 10A to 10I.

[0090] Furthermore, although an example has been described in which the infrared light source 363a and the visible light source 363b included in the light-emitting unit 363J are moved simultaneously, they may also be moved individually.

[0091] The above describes an ophthalmic device 10 and a method for controlling the light source of the ophthalmic device 10, comprising: an illumination system 32 supported so as to be rotatable around the eye E under examination while directing the irradiation direction of the first illumination light L1 toward the eye E under examination; an observation system 34 provided on the opposite side of the position of the eye E under examination from the illumination system 32; and a background illumination light-emitting unit 363 provided on the observation system 34 at a position below the eye E under examination, wherein the light-emitting unit 363 is dimmed according to the relative position of the illumination system 32 and the light-emitting unit 363.

[0092] Furthermore, the ophthalmic device 10 is described as comprising an illumination system 32 supported so as to be rotatable around the eye E while directing the irradiation direction of the first illumination light L1 toward the eye E under examination, and an observation system 34 having a camera device 56 and provided on the opposite side of the position of the eye E under examination from the illumination system 32, and the camera device 56 comprising an imaging unit 561 that receives the first illumination light L1 reflected by the eye E under examination and takes an image, and a background illumination light-emitting unit 363 provided in the observation system 34 at a position below the eye E under examination.Therefore, an ophthalmic device 10 and camera device 56 having background illumination function and imaging function for the eye E under examination can be provided with a simple configuration.

[0093] Furthermore, an ophthalmic device 10 has been described, comprising: an illumination system 32 supported so as to be rotatable around the eye E while directing the irradiation direction of the first illumination light L1 toward the eye E under examination; an observation system 34 provided on the opposite side of the position of the eye E under examination from the illumination system 32; and a background illumination light-emitting unit 363 provided in the observation system 34 at a position below the eye E under examination, wherein multiple light-emitting units 363 are provided in the movable direction of the illumination system 32 as viewed from the eye E side. Thus, an ophthalmic device 10 can be configured to suppress the occurrence of shadows on the eyelids while avoiding the shielding of the second illumination light L2 of the background illumination by the illumination system 32, and to observe the eye E under examination more accurately.

[0094] Furthermore, an ophthalmic device 10 was described, comprising: an illumination system 32 supported so as to be rotatable around the eye E while directing the irradiation direction of the first illumination light L1 toward the eye E under examination; an observation system 34 provided on the opposite side of the position of the eye E from the illumination system 32; and a background illumination light-emitting unit 363 provided on the observation system 34 at a position below the eye E under examination, wherein the ophthalmic device 10 has an avoidance function that moves the light-emitting unit 363 according to the position of the illumination system 32 to avoid the second illumination light L2 emitted from the light-emitting unit 363 being blocked by the illumination system 32. In this way, an ophthalmic device 10 and an illumination control method for the ophthalmic device 10 can be configured to suppress the generation of shadows on the eyelids and enable more accurate observation of the eye E under examination while avoiding the blocking of the second illumination light L2 of background illumination by the illumination system 32.

[0095] This concludes the description of the embodiments of this disclosure, but the embodiments of this disclosure are not limited to the configurations shown in each embodiment. [Explanation of Symbols]

[0096] 10(10A~10J) Ophthalmology equipment 10A-1,10A-2 Ophthalmic equipment 10J-1~10J-3 Ophthalmology equipment 12 bass 14 Face support section 14a Post 14b Chin rest 14c amount 16 Electric drive unit 18 movable tables 20 Operating levers 20a switch 22 First support member 24 Microscope support arms 24a Horizontal arm section 24b Vertical arm section 26 pivot axes 28 Second support member 30 rotational axes 32(32A,32C) Lighting system 32C1 Post 32I Lighting system 34 (34A, 34B) Observation System 36(36A,36B,36F~36J) Lighting device 38 Light source operation section 40 Control device 44 Slit lamp 46 Deflection optical system 46C illumination optical system 50 objective lens 52 Eyepieces 56 Camera equipment 56a Inserted part 61 Optical Encoders 62 Magnetic Encoders 63 Camera Section 64 TOF sensors 361 Lighting unit 362 Arm 362a Insertion section 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 section 383 Visible light source operation section 561 Imaging Unit 562 Power supply circuit 563 Control Circuit 611 Light Sensor 612 Slit disc 621 Magnetic Sensor 622 Magnetic Drum Dx Left / right direction Dy Anteroposterior direction Dz Vertical direction E. Eye being examined L1 First illumination light L2 Second illumination light L3 tangent LA observation axis O Origin θ Shading angle

Claims

1. The system comprises an illumination system supported so as to be rotatable around the eye under examination while directing the illumination light towards the eye under examination, and an observation system having a camera device and an illumination device, which is provided on the opposite side of the illumination system from the position of the eye under examination. The camera device includes an imaging unit that receives illumination light reflected by the eye under examination and captures an image. The illumination device has an illumination body that is positioned below the eye under examination and holds a light-emitting unit for background illumination provided in the observation system, The camera device is provided in the observation system on the side opposite to the eye being examined. The lighting device comprises a plurality of light-emitting units arranged approximately in the center of the lighting body in the left-right direction, The lighting device having background illumination is an ophthalmic device in which the lighting unit and the camera device are connected and power is supplied from the power circuit of the camera device.

2. The ophthalmic apparatus according to claim 1, wherein the control circuit of the light-emitting unit is housed within the camera device.

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