JP2018143433A - Ophthalmic observation apparatus and operation method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ophthalmic observation apparatus that allows an examiner to accurately confirm an observation condition for an observation image without deteriorating operability, and an operation method thereof.SOLUTION: An ophthalmic observation apparatus provided with an illumination system that causes a light to be incident on an eye to be examined, and an observation system that guides an outgoing light from the eye to be examined in accordance with the incidence of the light from the illumination system, to an eyepiece lens, in which an observation image of the eye to be examined formed by the outgoing light can be observed under a plurality of observation conditions through the eyepiece lens, includes: a setting information acquisition part for acquiring setting information on at least one of the illumination system and the observation system related to the observation conditions; and a setting information display part for displaying the setting information acquired by the setting information acquisition part in an observation visual field region where the observation image is observed through the eyepiece lens.SELECTED DRAWING: Figure 5

Description

  The present invention relates to an ophthalmic observation apparatus used for observing an eye to be examined and an operating method thereof.

  As an ophthalmic observation apparatus used for observing an eye to be examined in ophthalmology, for example, a slit lamp microscope (also referred to as a slit lamp) is known. A slit lamp microscope uses a slit light (also referred to as slit light) to observe a cross section of a target region by cutting out a light section of the target region of the eye to be examined, and to acquire an image of this cross section. Used.

  The slit lamp microscope includes an illumination system and an observation system. The illumination system makes the slit light whose slit width is adjusted enter the eye to be examined. On the other hand, the observation system guides the reflected light emitted from the eye to be examined to the eyepiece of the eyepiece in response to the incidence (illumination) of the slit light. Thereby, the examiner can observe the observation image of the eye to be formed formed based on the reflected light from the eye to be examined with both eyes through the eyepiece (eyepiece lens). Then, the examiner adjusts the magnification of the observation image while observing the observation image of the eye to be examined, inserts various filters in at least one optical path of the illumination system and the observation system, or enters the subject's eye. By performing various setting operations such as adjusting the amount of gap light, an observation image can be observed under a plurality of observation conditions (see Patent Document 1).

JP 2014-033812 A

  However, in the slit lamp microscope described in Patent Document 1, the examiner observes the observation image of the subject's eye with both eyes through the eyepiece portion of the slit lamp microscope. For this reason, when checking the current observation conditions of the slit lamp microscope (illumination system and observation system) while checking the observation image, the examiner keeps both eyes away from the eyepiece and operates the operation unit, etc. It is necessary to look directly at. For this reason, the operability of the slit lamp microscope is significantly reduced. Note that the examiner may determine the current observation conditions from the observation image observed through the eyepiece, but in this case, the examiner may make an incorrect decision. It causes human error such as incorrect setting operation.

  The present invention has been made in view of such circumstances, and provides an ophthalmic observation apparatus and an operation method thereof that allow an examiner to accurately confirm observation conditions of an observation image without reducing operability. For the purpose.

  An ophthalmic observation apparatus for achieving the object of the present invention includes an illumination system that makes light incident on a subject's eye, and an observation system that guides outgoing light emitted from the subject's eye to an eyepiece in response to the incidence of light from the illumination system In an ophthalmic observation apparatus capable of observing an observation image of an eye to be inspected formed by emitted light under a plurality of observation conditions through setting information on at least one of an illumination system and an observation system related to the observation conditions And a setting information display unit for displaying the setting information acquired by the setting information acquisition unit in the observation visual field region where the observation image is observed through the eyepiece.

  According to this ophthalmic observation apparatus, the examiner can simultaneously confirm the observation conditions of the observation image while observing the observation image through the eyepiece.

  In the ophthalmic observation apparatus according to another aspect of the present invention, the setting information display unit is located at a position shifted in a direction perpendicular to the optical axis of the emitted light from the imaging position of the emitted light imaged by the observation system. Is provided. Accordingly, since the setting information display unit can be provided in an empty space in the ophthalmic observation apparatus, it is possible to prevent the ophthalmic observation apparatus from being enlarged, and it is necessary to separately arrange optical members such as a lens and a mirror. Therefore, the number of parts and the arrangement space can be reduced. In addition, since the setting information display unit is not arranged on the optical axis of the emitted light, the image quality (brightness and the like) of the observation image observed through the eyepiece lens is prevented from being lowered. As a result, it is possible to achieve both a reduction in the number of components, a reduction in arrangement space, and an improvement in the image quality of the observation image.

  In the ophthalmic observation apparatus according to another aspect of the present invention, the setting information display unit is a transmissive display that is provided on the optical axis of the emitted light and transmits the emitted light. Accordingly, since the setting information display unit can be provided in an empty space in the ophthalmic observation apparatus, it is possible to prevent the ophthalmic observation apparatus from being enlarged, and it is necessary to separately arrange optical members such as a lens and a mirror. Therefore, the number of parts and the arrangement space can be reduced.

  In the ophthalmic observation apparatus according to another aspect of the present invention, the setting information display unit is provided in the observation system and an image emission optical system that emits an image of the setting information toward the observation system, and is emitted from the image emission optical system. A guide optical system for guiding the image of the set information to the eyepiece. Thereby, an observation image and the observation conditions of this observation image can be confirmed simultaneously.

  In the ophthalmic observation apparatus according to another aspect of the present invention, the observation system is provided with a variable magnification optical system that changes the magnification of the observation image, and the setting information includes the magnification of the observation image. Thereby, the magnification of the observation image can be confirmed as the observation condition of the observation image.

  In the ophthalmic observation apparatus according to another aspect of the present invention, the setting information includes an index indicating at least the size of the observation object in the observation image observed in the observation visual field region, and the setting information is acquired. The unit acquires an index corresponding to the magnification of the observation image. Thereby, the examiner can discriminate at least the size of the observation object observed in the observation visual field region, and as a result, the magnification of the observation image can be indirectly confirmed as the observation condition of the observation image. .

  In the ophthalmologic observation apparatus according to another aspect of the present invention, when the observation target is a corneal endothelial cell, the index is a scale indicating the size and density of the corneal endothelial cell. Thereby, the examiner can discriminate the size and density of the corneal endothelial cells observed in the observation visual field region, and as a result, the magnification of the observation image can be indirectly confirmed as the observation condition of the observation image. it can.

  In the ophthalmic observation apparatus according to another aspect of the present invention, the setting information includes a filter inserted in an optical path of light in the illumination system and a filter inserted in the optical path of outgoing light in the observation system. At least one is included. Thereby, the filter inserted in at least one of each optical path can be confirmed as observation conditions of an observation image.

  In the ophthalmic observation apparatus according to another aspect of the present invention, the setting information is arranged in the aperture diameter of the diaphragm arranged in the optical path of the light in the illumination system and the optical path of the emitted light in the observation system. At least one of the aperture diameter of the aperture is included. Thereby, as an observation condition of the observation image, the stop diameter of the stop arranged on at least one of the respective optical paths can be confirmed.

  An operation method of an ophthalmic observation apparatus for achieving the object of the present invention includes an illumination system that makes light incident on an eye to be examined, and an outgoing light emitted from the eye to be examined according to the incidence of light from the illumination system up to an eyepiece In the operating method of the ophthalmologic observation apparatus capable of observing the observation image of the eye to be examined formed by the emitted light under a plurality of observation conditions through the eyepiece, the setting information acquisition unit sets the observation condition as the observation condition. The setting information acquisition step for acquiring setting information of at least one of the illumination system and the observation system, and the setting information display unit acquired by the setting information acquisition unit in the observation visual field region where the observation image is observed through the eyepiece A setting information display step for displaying information.

  The ophthalmic observation apparatus and the operation method thereof according to the present invention allow the examiner to accurately confirm the observation condition of the observation image without reducing the operability.

It is a side view of the slit lamp microscope mounted on the table. It is the schematic which showed the structure of the optical system of both an illumination system and an observation system. It is an enlarged view of the periphery of the imaging position P in FIG. It is a block diagram which shows the electric constitution of a control part. It is explanatory drawing for demonstrating an example of the setting information displayed in an observation visual field area | region when scale switching operation is OFF setting. It is explanatory drawing for demonstrating an example of the setting information displayed in an observation visual field area | region when scale switching operation is ON setting, ie, when performing corneal endothelium observation. It is a flowchart which shows an example of the flow of observation of the eye to be examined using a slit lamp microscope. It is explanatory drawing for demonstrating another Embodiment 1 of a setting information display part. It is explanatory drawing for demonstrating another Embodiment 2 of a setting information display part.

[Configuration of slit lamp microscope]
FIG. 1 is a side view of the slit lamp microscope 10 placed on the table 9. As shown in FIG. 1, the slit lamp microscope 10 corresponds to the ophthalmic observation apparatus of the present invention, and includes a main body base 11, a chin rest 12, an electric drive unit 13, a moving stage 14, An operation lever 15, a support unit 16, an illumination system 18, an observation system 19, and a control unit 20 are provided.

  The main body base 11 is placed on the table 9. A chin rest 12 is provided at the end of the main body base 11 on the subject (patient) side, and an electric drive unit 13 and a moving stage 14 are provided on the upper surface of the main body base 11.

  The chin rest 12 has a chin rest 12a and a forehead pad 12b whose positions can be adjusted in the vertical direction in the figure, and supports the face of the subject when observing the eye E using the slit lamp microscope 10. .

  The electric drive unit 13 holds the moving stage 14 on the main body base 11 so as to be movable in the horizontal direction (front-rear direction and left-right direction). An operation lever 15 and a support portion 16 are provided on the upper surface of the moving stage 14. The front-rear direction is the forward direction approaching the subject and the rear direction away from the subject, and the left-right direction is the eye width direction of the subject.

  The electric drive unit 13 includes a motor (not shown) and a drive transmission mechanism (not shown) that converts the rotation of the motor into a driving force in the horizontal direction. The electric drive unit 13 moves the moving stage 14 in the horizontal direction according to the operation of the operation lever 15 under the control of the control unit 20 described later. Thereby, the position adjustment of the support part 16 (the illumination system 18 and the observation system 19) with respect to the eye E can be performed.

  The operation lever 15 is provided at the end of the upper surface of the moving stage 14 on the examiner side. The operation lever 15 is an operation member for manually moving the support portion 16 (the illumination system 18 and the observation system 19) in the horizontal direction (front-rear direction and left-right direction). For example, when the operation lever 15 is tilted in the front-rear direction or the left-right direction, the electric drive unit 13 moves the moving stage 14 in the front-rear direction or the left-right direction under the control of the control unit 20 described later.

  The support unit 16 supports the illumination system 18 and the observation system 19. A support arm 22 that supports the observation system 19 is attached to the support portion 16 so as to be rotatable in the left-right direction (rotatable about an axis parallel to the vertical direction). The support arm 22 has a horizontal portion extending in the front-rear direction in the figure, and a vertical portion extending upward from a base end portion on the rear side of the horizontal portion. A support arm 23 that supports the illumination system 18 is attached to the upper surface of the horizontal portion of the support arm 22 so as to be rotatable in the left-right direction. A lens barrel body 24 of the observation system 19 is attached to the upper surface of the vertical portion of the support arm 22.

  The support arm 22 and the support arm 23 can be independently rotated coaxially. As a result, when the examiner manually rotates the support arm 22, the observation system 19 is swung left and right about the rotation axis of the support arm 22, and the support arm 23 is manually rotated. The illumination system 18 is swung in the left-right direction around the rotation axis of the support arm 23. In addition, you may rotate each support arm 22 and 23 by the drive part comprised by a motor and a drive transmission mechanism.

  The illumination system 18 makes the slit light L1 (corresponding to the light of the present invention, see FIG. 2) incident on the eye E to be examined. As described above, the illumination system 18 can change the incident position (irradiation position) of the slit light L1 with respect to the eye E by manually swinging the illumination arm 18 in the left-right direction around the rotation axis of the support arm 23. In addition, in order to adjust the depression angle and the elevation angle of the slit light L1 incident on the eye E, the illumination system 18 may be configured to be able to swing in the vertical direction.

  A mirror 25 that reflects the slit light L1 output from the illumination system 18 toward the eye E is disposed below the illumination system 18.

  The observation system 19 uses the reflected light L2 (see FIG. 2) emitted (reflected here) from the eye E in response to the incidence of the slit light L1 (see FIG. 2) in the eyepiece 24a described later. It has a pair of left and right optical systems that lead to the lens 48 (see FIG. 2). The reflected light L2 includes various types of light that pass through the eye E, such as scattered light, for example, and these various types of light are referred to as “reflected light”.

  The optical system of the observation system 19 is accommodated in the barrel main body 24. The end of the lens barrel body 24 is a binocular eyepiece 24a. The examiner views the observation image 27 (see FIG. 2) of the eye E through the eyepiece 24a. The observation system 19 can change the orientation of the observation system 19 with respect to the eye E by manually swinging the observation system 19 in the left-right direction around the rotation axis of the support arm 22 as described above.

  An observation magnification operation knob 28 for changing the observation magnification of the observation image 27 (see FIG. 2) of the eye E is disposed on the side surface of the lens barrel body 24. An imaging device 29 that captures an observation image 27 of the eye E is connected to the lens barrel body 24.

  The control unit 20 is an arithmetic device such as a computer connected to each part of the slit lamp microscope 10 and comprehensively controls the operation of each part of the slit lamp microscope 10. In addition, although the control part 20 is provided in the figure outside the housing | casing of the slit lamp microscope 10, you may provide in this housing | casing.

  The slit lamp microscope 10 is used for various observations such as corneal observation, fundus observation, and lens observation of the eye E. The slit lamp microscope 10 is also used for corneal endothelial cell observation in which the corneal endothelial cell S (see FIG. 6) of the cornea Ec (see FIG. 2) of the eye E is directly observed. In this corneal endothelial cell observation, the slit light L1 (see FIG. 2) is obliquely incident on the eye E from the illumination system 18, and the intensity of the reflected light L2 (see FIG. 2) is highest in the observation system 19. The observation image 27 (see FIG. 2) of the eye E is magnified at a point to directly observe the corneal endothelial cell S.

[Configuration of optical system of slit lamp microscope 10]
FIG. 2 is a schematic diagram showing the configuration of the optical systems of both the illumination system 18 and the observation system 19. Note that the symbol Ec indicates the cornea of the eye E, the symbol Ep indicates the iris of the eye E, and the symbol Er indicates the fundus of the eye E. A symbol Eo indicates the examiner's observation eye. Further, symbol O1 indicates the optical axis of the slit light L1 (illumination light) in the illumination system 18, and symbol O2 indicates the optical axis of the reflected light L2 in the observation system 19.

<Configuration of lighting system>
The illumination system 18 includes a white light source 31, a relay lens 32, an illumination diaphragm 33, a condenser lens 34, a field diaphragm 35, a slit forming unit 36, and a condenser lens 37. In the illumination system 18, an optical filter 38 is detachably disposed between the slit forming part 36 and the condenser lens 37.

  The white light source 31 emits illumination light toward the relay lens 32. As the white light source 31, a known light source that emits white light such as a white light emitting diode (LED), a white organic EL (electroluminescence) light source, and a halogen lamp is used.

  A light source other than the white light source 31 described above may be additionally provided. For example, a light source that outputs steady light and a light source that outputs flash light may be provided separately. Further, a light source for corneal observation of the eye E and a light source for fundus observation may be provided separately.

  The relay lens 32 emits illumination light incident from the white light source 31 toward the illumination diaphragm 33.

  The illumination stop 33 has a light-transmitting part that transmits the illumination light incident from the white light source 31, and is configured to be able to change the size (aperture diameter) of the light-transmitting part. The illumination diaphragm 33 is an optical member that adjusts the amount of illumination light (slit light L1) incident on the eye E from the white light source 31, that is, brightness by adjusting the diameter of the diaphragm. The illumination stop 33 also has a function of reducing the reflection of illumination light by the cornea Ec and the crystalline lens of the eye E, a function of adjusting the brightness of the illumination light, and the like. The illumination light that has passed through the illumination aperture 33 enters the condenser lens 34.

  The condenser lens 34 condenses the illumination light incident from the illumination diaphragm 33 on the field diaphragm 35.

  The field stop 35 has a light transmitting portion that transmits the illumination light incident from the condenser lens 34, and is configured to be able to change the size (diaphragm diameter) of the light transmitting portion. The field stop 35 adjusts the irradiation field of the illumination light (slit light L1) output from the white light source 31 to the eye E by adjusting the stop diameter. The illumination light that has passed through the field stop 35 enters the slit forming part 36.

  The slit forming unit 36 generates the slit light L 1 from the illumination light incident from the field stop 35, and emits the slit light L 1 toward the condenser lens 37. The slit forming part 36 has a pair of slit blades, and adjusts the width of the slit light L1 by changing the interval (slit width) between the slit blades.

  The optical filter 38 is disposed between the slit forming unit 36 and the condensing lens 37 so as to be detachable in the optical path of the slit light L1 emitted from the slit forming unit 36. Examples of the optical filter 38 include a blue filter, a non-red filter, an ND (Neutral Density) filter, a color temperature change filter, an IR (infrared) cut filter, and an exciter filter. An optical filter 38 other than these may be used. In addition, a UV (ultraviolet) cut filter that cuts ultraviolet light included in the slit light L1 is always inserted in the optical path of the slit light L1.

  The blue filter is a filter used for fluorescence observation of the eye E to which a fluorescent contrast agent (fluorescein) is administered, and transmits light in the blue wavelength region. The non-red filter is a filter that is used when examining abnormalities in the optic nerve fiber, and is an optical filter (such as a green filter) that cuts light in the red wavelength region. The ND filter is an optical filter for changing (decreasing) the transmittance of the slit light L1.

  The color temperature conversion filter is an optical filter that lowers the color temperature of the slit light L1 emitted from the slit forming unit 36, which will be described later, and converts the light into warm color light. When this color temperature conversion filter is used, a cold white light source is used as the white light source 31 described above. The IR cut filter cuts infrared light included in the slit light L1.

  The exciter filter is an optical filter such as a band pass filter that can transmit a wavelength component (excitation wavelength component) of excitation light that excites a fluorescent agent administered to the eye E and generates fluorescence.

  Each of these optical filters 38 is fitted in a filter turret 39 (see FIG. 4) in a state of being arranged in the circumferential direction along the axis of the optical axis O1. Then, by rotating the filter turret 39 under the control of the control unit 20, each optical filter 38 is selectively inserted into the optical path of the slit light L1. By providing a plurality of filter turrets 39, a plurality of types of optical filters 38 can be simultaneously inserted into the optical path of the slit light L1.

  The condensing lens 37 condenses the condensing lens 37 with the slit light L1 incident from the slit forming unit 36 or the slit light L1 incident through the optical filter 38 from the slit forming unit 36.

  The mirror 25 is an optical member shared by the illumination system 18 and the observation system 19, and for example, a half mirror and a beam splitter are used. The mirror 25 reflects a part of the slit light L1 incident from the condenser lens 37 toward the eye E. Further, the mirror 25 corresponds to an image of the anterior segment of the eye E (hereinafter simply abbreviated as reflected light L2) including the reflected light L2 of the slit light L1 reflected by the eye E. ) Is transmitted as it is and emitted to the observation system 19.

<Configuration of observation system>
The observation system 19 includes a pair of left and right optical systems such as Galileo type or Greeno type corresponding to both eyes of the eye E to be examined. The left and right optical systems have substantially the same configuration. The examiner observes the eye E with binocular eyes using the left and right optical systems. In FIG. 2, only one of the left and right optical systems of the observation system 19 is shown.

  The optical system of the observation system 19 includes an objective lens 41, a variable magnification optical system 42, a stop 43, a barrier filter 44, a beam splitter 45, a relay lens 46, a prism 47, and an eyepiece lens 48.

  The objective lens 41 emits the reflected light L2 incident from the mirror 25 toward the variable power optical system 42.

  For the variable magnification optical system 42, for example, a known drum type variable magnification mechanism is used. The variable magnification optical system 42 includes a plurality of (for example, two) variable magnification lenses 42a and 42b. The variable power lenses 42a and 42b move along the optical axis O2 in accordance with the operation of the observation magnification operation knob 28 described above. Thereby, the magnification (view angle) of the observation image 27 of the eye E to be examined formed by the reflected light L2 and the captured image of the observation image 27 can be changed. For example, in the present embodiment, the magnification of the observation image 27 can be changed in five steps (6 × / 10 × / 16 × 25 × 40) by the variable magnification optical system 42. The reflected light L <b> 2 that has passed through the variable magnification optical system 42 is emitted toward the barrier filter 44 or the beam splitter 45.

  Note that, as the variable magnification optical system 42, the magnification of the observation image 27 is increased in multiple stages by electrically moving the variable magnification lenses 42a and 42b along the optical axis O2 using a switch or the like (not shown) and a lens driving unit. You may adjust.

  A diaphragm 43 is disposed between the variable power lenses 42a and 42b. The diaphragm 43 has a light transmitting part that transmits the reflected light L2 incident from the variable magnification lens 42a, and is configured to be able to change the size (diaphragm diameter) of the light transmitting part. The diaphragm 43 is an optical member that adjusts the amount of the reflected light L2 incident on the observation eye Eo and the image sensor 53 by adjusting the diameter of the diaphragm.

  The barrier filter 44 is disposed between the variable magnification optical system 42 and the beam splitter 45 so as to be detachable with respect to the optical path of the reflected light L2. The barrier filter 44 is inserted into the optical path of the reflected light L2 when performing fluorescence observation. The barrier filter 44 is an optical filter such as a bandpass filter that transmits a wavelength component corresponding to the fluorescence emitted by the fluorescent agent administered to the eye E during fluorescence observation. The barrier filter 44 is held by a filter driving unit 67 described later, and is inserted into and removed from the optical path of the reflected light L2 under the control of the control unit 20. When the barrier filter 44 is inserted into the optical path of the reflected light L2, the exciter filter in the optical filter 38 described above is inserted into the optical path of the slit light L1. Thereby, the fluorescence observation of the eye E can be performed.

  The beam splitter 45 is provided in one or both of the left and right optical systems of the observation system 19. The beam splitter 45 divides the reflected light L2 incident from the variable magnification optical system 42 or the reflected light L2 incident from the variable magnification optical system 42 via the barrier filter 44 into two parts. The beam splitter 45 emits one of the two divided reflected lights L2 toward the relay lens 46 and emits the other reflected light L2 toward the optical system of the imaging device 29.

  The relay lens 46 emits the reflected light L 2 incident from the beam splitter 45 toward the prism 47.

  The prism 47 includes two optical elements 47a and 47b, translates the traveling direction of the reflected light L2 incident from the relay lens 46 upward, and forms an image of the reflected light L2 at the imaging position P.

  The eyepiece lens 48 is provided in the eyepiece 24a. Thereby, the observation eye Eo can observe the observation image 27 (magnified image) of the eye E formed by the reflected light L <b> 2 imaged at the imaging position P by the prism 47 through the eyepiece lens 48.

  The imaging device 29 includes a relay lens 51, a mirror 52, and an imaging element 53. The relay lens 51 emits the reflected light L <b> 2 incident from the beam splitter 45 toward the mirror 52. The mirror 52 reflects the reflected light L2 incident from the relay lens 51 toward the image sensor 53. The reflected light L2 reflected by the mirror 52 is imaged on the imaging surface of the imaging element 53 via an imaging lens (not shown).

  For example, a CMOS (complementary metal oxide semiconductor) type or a CCD (Charge Coupled Device) type image sensor is used for the imaging element 53. The imaging element 53 images the reflected light L2 imaged on the imaging surface, that is, the observation image 27 of the eye E, and outputs captured image data of the observation image 27.

  In the slit lamp microscope 10 of the present embodiment, by changing the setting of at least one of the illumination diaphragm 33, the field diaphragm 35, the slit forming section 36, the optical filter 38, the variable magnification optical system 42, and the barrier filter 44, The observation conditions of the observation image 27 can be changed. Accordingly, the examiner can observe the observation image 27 through the eyepiece lens 48 under a plurality of observation conditions.

  FIG. 3 is an enlarged view of the periphery of the imaging position P in FIG. As shown in FIG. 3, in the barrel main body 24, a micro display 55 (also referred to as a micro display projector) is located at a position shifted from the imaging position P in a direction perpendicular to the optical axis O2 (including a substantially vertical direction). ) Is provided. Specifically, the micro display 55 is an observation image 27 that is the focal position (including the vicinity of the focal position) of the observation eye Eo that observes the observation image 27 through the eyepiece 48 and that is imaged at the imaging position P. (Position which does not hinder the observation of the observation image 27 by the observation eye Eo). Note that the micro display 55 is provided in one or both of the left and right optical systems of the observation system 19.

  The micro display 55 corresponds to the setting information display unit of the present invention, and displays various images (emits image light). Examples of the micro display 55 include a reflective liquid crystal panel (Liquid crystal on silicon), a DMD (Digital Micro mirror Device), a MEMS (Micro Electro Mechanical Systems), an EL display (electroluminescence display), a transmissive liquid crystal display, and image generation. For example, a micro scanner is used.

  The micro display 55 may include one or more of at least one of an illumination source that emits visible light and an illumination source that emits invisible light, for example, to emit an infrared image or a color image. The illumination source can be a halogen lamp, white LED, one or more coaxial LEDs (eg, red, green, blue, amber, or near infrared LED), or one or more coaxial lasers (eg, red-green). -Blue (RGB) or near-infrared laser) can be used.

  The micro display 55 displays setting information 83 (see FIG. 5) of the illumination system 18 and the observation system 19 relating to the observation conditions of the observation image 27. As this setting information 83, the distance between the pair of slit blades of the slit forming section 36 (width of the slit light L1), the magnification of the observation image 27 changed by the variable magnification optical system 42, the observation object in the observation image 27 An index indicating at least the size of the object, the aperture diameter of the illumination aperture 33, the aperture diameter of the field aperture 35, the type of the optical filter 38 inserted in the optical path of the slit light L1, and the optical path of the reflected light L2 into the optical path An example is insertion / removal of the barrier filter 44.

  When the micro display 55 displays the setting information 83 (see FIG. 5), the observation image 27 and the setting are set in the observation visual field region R (see FIG. 5) where the observation eye Eo observes the observation image 27 through the eyepiece 48. The information 83 can be combined and displayed (parallel display).

[Function of control unit]
FIG. 4 is a block diagram showing an electrical configuration of the control unit 20. As shown in FIG. 4, the control unit 20 is an arithmetic circuit including various arithmetic units including, for example, a CPU (Central Processing Unit) or an FPGA (field-programmable gate array), a memory, and the like. The overall operation of each part of the microscope 10 is controlled. The control unit 20 controls the electric drive unit 13, the illumination system 18, the observation system 19, and the like according to the operation of the operation unit 68.

  The control unit 20 includes a storage unit 61, a display unit 62, an illumination diaphragm drive unit 63, a field diaphragm drive unit 64, and a slit drive unit 65 in addition to the electric drive unit 13, the white light source 31, and the image sensor 53 described above. The filter drive unit 66, the filter drive unit 67, the operation unit 68, and the like are connected. In the figure, the position adjusting unit for adjusting the positions of the chin rest 12a and the forehead pad 12b of the chin rest 12 and the aperture driving unit for adjusting the aperture diameter of the aperture 43 in the observation system 19 are not shown. ing.

  The storage unit 61 stores a control program (not shown) for the control unit 20 to control the electric drive unit 13, the illumination system 18, the observation system 19, and the like. The storage unit 61 stores various types of information such as the captured image data of the observation image 27 acquired by the control unit 20 from the imaging element 53 described above.

  The display unit 62 is a known monitor such as a liquid crystal display (which may be a touch panel type liquid crystal display), and is provided on the surface of the slit lamp microscope 10 or outside the housing. The display unit 62 displays various information under the control of the control unit 20. For example, the display unit 62 displays an operation screen for operating each unit of the slit lamp microscope 10 (other than an operation mainly performed by the operation unit 68 described later), the captured image data of the observation image 27 described above, and the like.

  Each drive unit such as the illumination stop drive unit 63, the field stop drive unit 64, the slit drive unit 65, the filter drive unit 66, and the filter drive unit 67 includes, for example, an actuator (not shown) such as a motor or a solenoid and the actuator. And a transmission mechanism (not shown) for transmitting the driving force generated by.

  The illumination stop driving unit 63 operates the illumination stop 33 to adjust the stop diameter. In addition, the field stop driving unit 64 operates the field stop 35 to adjust the diameter of the stop. For example, in this embodiment, the diaphragm diameters of the illumination diaphragm 33 and the field diaphragm 35 can be adjusted in six stages (φ14 mm / φ10 mm / φ5 mm / φ2 mm / φ1 mm / φ0.2 mm).

  The slit driving unit 65 operates the pair of slit blades of the slit forming unit 36 to adjust the interval between the pair of slit blades, that is, the width of the slit light L1.

  The filter drive unit 66 selectively inserts each optical filter 38 into the optical path of the slit light L1 by rotating the filter turret 39 described above around its central axis (axis parallel to the optical axis O1). . The filter drive unit 67 moves the barrier filter 44 in a direction perpendicular to the optical axis O2, thereby inserting and removing the barrier filter 44 with respect to the optical path of the reflected light L2.

  The operation unit 68 is used for the operation of each part of the slit lamp microscope 10 including the operation of the electric drive unit 13 and the operation of the illumination system 18 and the observation system 19. The operations of the illumination system 18 and the observation system 19 are setting operations for setting (changing) the observation conditions of the observation image 27.

  The operation unit 68 includes, in addition to the operation lever 15 and the observation magnification operation knob 28 described above, an illumination stop operation unit 71, a field stop operation unit 72, an interval change operation unit 73, an optical filter operation unit 74, and a barrier filter operation unit 75. , And a scale switching operation unit 76 and the like. In the drawing, the illustration of the configuration for operating the chin rest 12 and the diaphragm 43 in the observation system 19 is omitted.

  The operation lever 15 is provided with a direct-acting potentiometer (not shown), and this direct-acting potentiometer detects a tilting operation of the operation lever 15 in the front-rear direction and the left-right direction. The control unit 20 controls the drive of the electric drive unit 13 based on the detection result of the direct acting potentiometer to move the moving stage 14 in the front-rear direction or the left-right direction.

  The observation magnification operation knob 28 is used for a magnification selection operation for selecting the magnification of the observation image 27 from the five-stage magnification described above. In response to this magnification selection operation, the variable magnification optical system 42 changes the magnification of the observation image 27.

  The illumination aperture operation unit 71, the field aperture operation unit 72, the interval change operation unit 73, the optical filter operation unit 74, the barrier filter operation unit 75, and the scale switching operation unit 76 are physical such as switches, levers, handles, and keys. In addition to a simple operation unit, a virtual operation unit such as an icon in the operation screen displayed on the display unit 62 described above may be used.

  The illumination aperture operation unit 71 is used for an aperture diameter selection operation for selecting the aperture diameter of the illumination aperture 33. The control unit 20 adjusts the aperture diameter of the illumination aperture 33 by controlling the drive of the illumination aperture driving unit 63 based on the aperture diameter selection operation performed by the illumination aperture operation unit 71.

  The field stop operation unit 72 is used for a stop diameter selection operation for selecting the stop diameter of the field stop 35. The control unit 20 adjusts the aperture diameter of the field stop 35 by controlling the driving of the field stop drive unit 64 based on the aperture diameter selection operation performed by the field stop operation unit 72.

  The interval changing operation unit 73 is used for an interval adjusting operation for adjusting the interval between the pair of slit blades of the slit forming unit 36 (width of the slit light L1). The control unit 20 controls the driving of the slit driving unit 65 based on the interval adjusting operation performed by the interval changing operation unit 73 to adjust the interval between the pair of slit blades.

  The optical filter operation unit 74 is used for a filter selection operation for selecting an optical filter 38 to be inserted into the optical path of the slit light L1 from among a plurality of types of optical filters 38. The control unit 20 controls the drive of the filter drive unit 66 based on the filter selection operation performed by the optical filter operation unit 74, and the optical filter 38 selected by the filter selection operation is in the optical path of the slit light L1. Rotate the filter turret 39 so that it is inserted into

  The barrier filter operation unit 75 is used for a filter insertion / removal operation for selecting insertion / removal of the barrier filter 44 with respect to the optical path of the reflected light L2. Based on the filter insertion / removal operation performed by the optical filter operation unit 74, the control unit 20 controls the drive of the filter drive unit 67 to insert / remove the barrier filter 44 with respect to the optical path of the reflected light L2.

  The scale switching operation unit 76 is used for a scale switching operation for switching scale display included in setting information 83 (see FIGS. 5 and 6) described later displayed on the micro display 55. Specifically, the scale switching operation unit 76 is set to ON when observing the corneal endothelial cell S (see FIG. 6) as observation of the eye E, and is set to OFF when performing other observations. The control unit 20 changes the scale display (see FIGS. 5 and 6) in the setting information 83 by the micro display 55 based on the scale switching operation performed by the scale switching operation unit 76.

  The control unit 20 functions as a setting information acquisition unit 80 and a setting information display control unit 81 by executing a control program (not shown) read from the storage unit 61.

  The setting information acquisition unit 80 acquires the setting information 83 of the illumination system 18 and the observation system 19 related to the observation condition of the observation image 27 based on the operation state of each unit of the operation unit 68, and displays the acquired setting information 83 as setting information display Output to the control unit 81.

  Specifically, the setting information acquisition unit 80 acquires and outputs information regarding the aperture diameter of the illumination diaphragm 33 as the setting information 83 based on the operation state of the illumination diaphragm operation unit 71. The setting information acquisition unit 80 acquires and outputs information related to the aperture diameter of the field stop 35 as setting information 83 based on the operation state of the field stop operation unit 72.

  The setting information acquisition unit 80 acquires and outputs information on the interval between the pair of slit blades (the width of the slit light L1) of the slit forming unit 36 as the setting information 83 based on the operation state of the interval changing operation unit 73. Do.

  The setting information acquisition unit 80 acquires and outputs information regarding the type of the optical filter 38 inserted in the optical path of the slit light L1 as setting information 83 based on the operation state of the optical filter operation unit 74. In addition, the setting information acquisition unit 80 acquires and outputs information regarding insertion / removal of the barrier filter 44 with respect to the optical path of the reflected light L2 as setting information 83 based on the operation state of the barrier filter operation unit 75.

  The setting information acquisition unit 80 acquires and outputs information regarding the magnification of the observation image 27 by the variable magnification optical system 42 as setting information 83 based on the operation state of the observation magnification operation knob 28.

  The setting information acquisition unit 80 sets the observation image 27 as the setting information 83 based on the operation state of the observation magnification operation knob 28 (magnification of the observation image 27 by the variable magnification optical system 42) and the operation state of the scale switching operation unit 76. The scales 85A and 85B (see FIGS. 5 and 6), which serve as indices indicating at least the sizes of the various observation objects, are acquired and output. The acquisition of the scales 85A and 85B by the setting information acquisition unit 80 includes generation of the scales 85A and 85B.

  Specifically, the setting information acquisition unit 80 uses the setting information 83 as the setting information 83 based on the magnification of the observation image 27 when the operation state of the scale switching operation is set to OFF, that is, when observation other than corneal endothelial cell observation is performed. The scale 85A (see FIG. 5) indicating the sizes of various observation objects in the image 27 is acquired and output. On the other hand, when the operation state of the scale switching operation is set to ON, that is, when corneal endothelial cell observation is performed, the setting information acquisition unit 80 uses the size and density of the corneal endothelial cell S (see FIG. 6) as the setting information 83. The scale 85B (see FIG. 6) indicating the above is acquired and output. The scales 85A and 85B are information that indirectly indicates the magnification of the observation image 27 as the observation condition of the observation image 27 because the scales 85A and 85B are scaled according to the magnification of the observation image 27.

  The setting information display control unit 81 controls the micro display 55 based on the setting information 83 input from the setting information acquisition unit 80 to display the setting information 83. Thereby, the setting information 83 is displayed in the observation visual field region R (see FIG. 5) in which the observation eye Eo observes the observation image 27 through the eyepiece 48.

  FIG. 5 is an explanatory diagram for explaining an example of the setting information 83 displayed in the observation visual field region R when the scale switching operation is set to OFF. FIG. 6 is an explanatory diagram for explaining an example of the setting information 83 displayed in the observation visual field region R when the scale switching operation is set to ON, that is, when corneal endothelium observation is performed.

  As shown in FIGS. 5 and 6, the setting information display control unit 81 is arranged on the micro display 55 at a position that is the focal position of the observation eye Eo and is adjacent to the observation image 27 formed at the imaging position P. Setting information 83 is displayed. Thereby, the setting information 83 is displayed at a position adjacent to the observation image 27 in the observation visual field region R, that is, the setting information 83 is synthesized and displayed (parallel display) with respect to the observation image 27.

  The setting information 83 displayed in the observation visual field region R includes an aperture diameter display field 83a, an aperture diameter display field 83b, an interval display field 83c, an optical filter field 83d, a barrier filter field 83e, and a magnification field 83f. And a scale column 83g.

  In the aperture diameter display field 83a, the aperture diameter “φ1” of the illumination aperture 33 is displayed. In the aperture diameter display field 83b, the aperture diameter “φ2” of the field stop 35 is displayed. In the interval display field 83c, the interval (width) “W” between the pair of slit blades of the slit forming portion 36 is displayed. The optical filter column 83d displays the type (name) of the optical filter 38 inserted in the optical path of the slit light L1.

  In the barrier filter field 83e, “IN” is displayed when the barrier filter 44 is inserted into the optical path of the reflected light L2, and conversely, when the barrier filter 44 is outside the optical path of the reflected light L2, “IN” is displayed. OUT "is displayed. In the magnification field 83f, the magnification of the observation image 27 by the variable magnification optical system 42 is displayed.

  As shown in FIG. 5, when the scale switching operation is set to OFF (when observation other than corneal endothelial cell observation is performed), an object to be observed (eg, blood vessel, lens, and so on) in the observation image 27 is displayed in the scale column 83g. A scale 85A indicating the size of the macular etc. is displayed. On the other hand, as shown in FIG. 6, when the scale switching operation is set to ON (when corneal endothelial cell observation is performed), the scale column 83g contains the size of the corneal endothelial cell S that is the observation object in the observation image 27. A scale 85B indicating the height and density is displayed. As described above, the scales 85A and 85B are enlarged or reduced in accordance with the increase or decrease of the magnification of the observation image 27 by the variable magnification optical system 42.

[Operation of slit lamp microscope]
FIG. 7 is a flowchart showing an example of the flow of observation of the eye E using the slit lamp microscope 10 having the above configuration (the operation method of the ophthalmic observation apparatus of the present invention). When the examiner turns on the slit lamp microscope 10, the control unit 20 turns on the white light source 31 of the illumination system 18. Thereby, illumination light is emitted from the white light source 31. The illumination light emitted from the white light source 31 enters the slit forming part 36 through the relay lens 32, the illumination stop 33, the condenser lens 34, and the field stop 35, and becomes the slit light L1. The slit light L 1 enters the mirror 25 through the optical filter 38 and the condenser lens 37, and is reflected by the mirror 25. Thereby, the slit light L1 is emitted from the illumination system 18 (step S1).

  Further, the examiner adjusts the positions of the chin rest 12a and the forehead pad 12b of the chin rest 12 and the positions of the illumination system 18 and the observation system 19 by the operation lever 15 to thereby adjust the eye E of the subject. And the positional relationship between the illumination system 18 and the observation system 19 are adjusted (step S2). Note that the order of step S1 and step S2 may be reversed. Thereby, the slit light L1 emitted from the illumination system 18 enters the eye E, and the reflected light L2 emitted from the eye E according to this incidence enters the observation system 19 via the mirror 25 (step S3). ).

  A part of the reflected light L2 incident on the observation system 19 passes through the objective lens 41, the variable magnification optical system 42, the diaphragm 43, the barrier filter 44, the beam splitter 45, the relay lens 51, and the mirror 52, and the imaging surface of the imaging device 53. And imaged by the image sensor 53. Thereby, the captured image data of the observation image 27 of the eye E is output from the imaging element 53 to the control unit 20, and the captured image data is displayed on the display unit 62 under the control of the control unit 20.

  A part of the reflected light L2 incident on the observation system 19 enters the prism 47 through the objective lens 41, the variable magnification optical system 42, the stop 43, the barrier filter 44, the beam splitter 45, and the relay lens 46. An image is formed at the imaging position P by the prism 47. Thereby, the observation image 27 is displayed in the observation visual field region R (step S4).

  On the other hand, the setting information acquisition unit 80 of the control unit 20 sets the setting information of the illumination system 18 and the observation system 19 according to the observation condition of the observation image 27 based on the operation state of each unit of the operation unit 68 shown in FIG. 83 is acquired, and the acquired setting information 83 is output to the setting information display control unit 81 (step S5, corresponding to the setting information acquisition step of the present invention).

  Upon receiving the setting information 83 from the setting information display control unit 81, the setting information display control unit 81 causes the micro display 55 to display the setting information 83 based on the setting information 83 (step S6, setting information display of the present invention). Equivalent to the process). Thereby, since the setting information 83 is displayed on the micro display 55 at a position adjacent to the observation image 27 formed at the imaging position P, the setting information 83 is synthesized and displayed on the observation image 27 in the observation visual field region R. (Displayed in parallel). As a result, the examiner can confirm the setting information 83 of the illumination system 18 and the observation system 19, that is, the current observation conditions of the slit lamp microscope 10.

  Specifically, based on the setting information 83 displayed in the observation visual field region R, the examiner sets the observation aperture of the observation image 27 as the illumination diameter of the illumination diaphragm 33 and the field diaphragm 35, and a pair of slits of the slit forming unit 36. The distance between the blades, the type of the optical filter 38 inserted in the optical path of the slit light L1, the insertion / removal of the barrier filter 44 with respect to the optical path of the reflected light L2, the magnification of the observation image 27, and the like can be confirmed.

  Further, when the examiner performs observation other than corneal endothelial cell observation of the eye E, based on the scale 85A in the setting information 83, the observation object (for example, blood vessel, lens, and macula) is observed in the observation image 27. ) Can be determined. On the other hand, when observing the corneal endothelial cell of the eye E, the examiner can determine the size and density of the corneal endothelial cell S in the observation image 27 based on the scale 85B in the setting information 83. Thus, the examiner can indirectly confirm the magnification of the observation image 27 as the observation condition of the observation image 27.

  The examiner changes the observation condition of the observation image 27 by the slit lamp microscope 10, that is, at least a part of the settings of the illumination system 18 and the observation system 19 (for example, the image magnification of the observation image 27, the type of the optical filter 38, When changing the aperture diameters of the apertures 33 and 35), a setting change operation is performed on the corresponding one of the operation unit 68 (YES in step S7). Thereby, the observation conditions of the observation image 27 are changed by changing the settings of the illumination system 18 and the observation system 19 corresponding to the setting change operation (step S8). The setting information 83 acquired by the information acquisition unit 80 is updated, and as a result, the setting information 83 displayed on the micro display 55 is also updated (steps S5 and S6).

  Thereafter, the processes after step S3 are repeated until the observation of the eye E is completed (step S9).

[Effect of this embodiment]
As described above, the slit lamp microscope 10 according to the present embodiment displays the setting information 83 on the micro display 55 provided in the lens barrel body 24, thereby setting information for the observation image 27 in the observation visual field region R. 83 can be combined and displayed (parallel display). Thus, the examiner simultaneously confirms the setting information 83 of the illumination system 18 and the observation system 19 related to the observation conditions of the observation image 27 while observing the observation image 27 without releasing the observation eye Eo from the eyepiece 24a. it can. This eliminates the need for the examiner to determine the observation conditions from the observation image 27 displayed in the observation visual field region R. As a result, the examiner can accurately confirm the observation conditions of the observation image 27 without reducing the operability.

  In this embodiment, the micro display 55 is provided in a position shifted in the direction perpendicular to the optical axis O2 from the imaging position P (see FIG. 3) of the observation image 27, that is, in an empty space. The (slit lamp microscope 10) can be prevented from becoming large, and the number of parts and the arrangement space can be reduced as compared with the second embodiment shown in FIG. 9 described later. Furthermore, since the micro display 55 is not disposed on the optical axis O2 as in the first embodiment shown in FIG. 8 described later, the image quality (brightness, etc.) of the observation image 27 observed in the observation visual field region R. Is prevented. As a result, it is possible to achieve both the reduction in the number of components and the arrangement space and the improvement in the image quality of the observation image 27.

[Another Embodiment 1 of Micro Display (Setting Information Display Unit)]
FIG. 8 is an explanatory diagram for explaining another embodiment 1 of the setting information display unit of the present invention. In the above embodiment, the micro display 55 is arranged at a position shifted from the imaging position P in the direction perpendicular to the optical axis O2. However, as shown in FIG. It is located at the imaging position P and on the optical axis O2 (corresponding to the optical axis of the outgoing light of the present invention). Since the configuration other than the micro display 55A is the same as that of the above-described embodiment, the same reference numerals are given to the same functions or configurations as those of the above-described embodiment, and the description thereof is omitted.

  The micro display 55A is basically the same as the micro display 55 of the above embodiment except that the micro display 55A is a transmissive display that transmits the reflected light L2, such as a transmissive liquid crystal display. Therefore, as in the above embodiment, the micro display 55A displays the setting information 83 shown in FIGS. 5 and 6 in the observation visual field region R, thereby obtaining the same effect as in the above embodiment. .

  Further, by controlling the display position of the setting information 83 on the micro display 55A, not only the setting information 83 is synthesized and displayed (parallel display) at a position adjacent to the observation image 27 in the observation visual field region R, but the observation image 27 is also displayed. The setting information 83 can be combined and displayed (superimposed display). Furthermore, since the micro display 55A is also provided in an empty space in the lens barrel main body 24 (slit lamp microscope 10), the size of the lens barrel main body 24 can be prevented, and as a result, as shown in FIG. 9 described later. The number of parts and the arrangement space can be reduced as compared with the second embodiment.

  In FIG. 8, the micro display 55A is arranged on the imaging position P. However, if the setting information 83 is visible in the observation visual field region R, the position of the micro display 55A is There is no particular limitation.

[Another Embodiment 2 of Micro Display (Setting Information Display Unit)]
FIG. 9 is an explanatory diagram for explaining another embodiment 2 of the setting information display unit of the present invention. In the above embodiment, the micro display 55 is disposed in the vicinity of the imaging position P. However, as shown in FIG. 9, an image emission optical system 90 may be provided in the barrel main body 24 of the observation system 19. Since the configuration is basically the same as that of the above embodiment except that the image display optical system 90 is provided instead of the micro display 55, the same reference numerals are given to the same functions or configurations as those of the above embodiment. The description is omitted.

  The image output optical system 90 includes a micro display 55B, a lens 91, and a mirror 92. The micro display 55 </ b> B is basically the same as the micro display 55 of the above embodiment, and emits an image (image light) of the setting information 83 toward the lens 91.

  The lens 91, together with the mirror 92, the relay lens 46, and the prism 47, constitutes the guide optical system of the present invention. The lens 91 collects the image of the setting information 83 incident from the micro display 55 </ b> B and emits it toward the mirror 92.

  The mirror 92 is, for example, a half mirror or a beam splitter disposed on the optical axis O2 at a position between the beam splitter 45 and the relay lens 46. The mirror 92 transmits at least part of the reflected light L2 incident from the beam splitter 45 as it is and emits it toward the relay lens 46, and at least part of the image of the setting information 83 incident from the lens 91 is relay lens. Reflects toward 46. As a result, the image of the setting information 83 merges with the reflected light L2, and is imaged at the imaging position P by the prism 47 via the relay lens 46.

  As described above, the reflected light L2 and the image of the setting information 83 are imaged at the imaging position P by the prism 47, so that the above-described FIGS. Since the setting information 83 shown in FIG. 6 can be displayed, the same effect as the above embodiment can be obtained. Further, by controlling the emission position of the image of the setting information 83 by the micro display 55B, in the same manner as in the first embodiment shown in FIG. Not only can the setting information 83 be synthesized and displayed (parallel display), but the setting information 83 can be synthesized and displayed (superimposed display) on the observation image 27.

[Others]
In the above embodiment, the setting information 83 of both the illumination system 18 and the observation system 19 related to the observation condition of the observation image 27 is displayed in the observation visual field region R by the micro display 55. However, the illumination system 18 and the observation system Only one of the setting information 83 may be displayed in the observation visual field region R.

  The setting information 83 displayed in the observation visual field region R in each of the above embodiments is not limited to that illustrated in FIGS. 5 and 6, and is at least one of the illumination system 18 and the observation system 19 related to the observation condition of the observation image 27. Various setting information is included. The various setting information includes the type of light source used in the illumination system 18 (including the type of illumination method such as fluorescence observation), the incident angle of the slit light L1 with respect to the eye E to be examined by the illumination system 18, and the eye E to be examined. Examples include the direction of the observation system 19, the diameter of the diaphragm 43 in the observation system 19, and information indicating the left and right eyes of the eye E to be examined.

  In each of the above embodiments, the slit lamp microscope 10 has been described as an example of the ophthalmic observation apparatus of the present invention. For example, a surgical microscope, a fundus camera, OCT (Optical Coherene Tomography), SLO (Scanning Laser Ophthalmoscope) The present invention can also be applied to an ocular length meter, a slit lamp, a refractometer, a keratometer, a tonometer, a specular microscope, and a complex machine thereof. That is, the present invention can be applied to various ophthalmic observation apparatuses that can observe the observation image 27 of the eye E through the eyepiece 48 under a plurality of observation conditions.

  DESCRIPTION OF SYMBOLS 10 ... Slit lamp microscope, 18 ... Illumination light, 19 ... Observation system, 20 ... Control part, 24a ... Eyepiece part, 27 ... Observation image, 28 ... Observation magnification operation knob, 33 ... Illumination stop, 35 ... Field stop, 36 ... slit forming section, 38 ... optical filter, 42 ... variable power optical system, 44 ... barrier filter, 48 ... eyepiece, 55, 55A, 55B ... micro display, 68 ... operation section, 80 ... setting information acquisition section, 81 ... setting information display control unit, 83 ... setting information, 85A, 85B ... scale

Claims (10)

An illumination system that makes light incident on the eye to be examined; and an observation system that guides the emitted light emitted from the eye to be inspected to the eyepiece in response to the incidence of light from the illumination system, and is formed by the emitted light In an ophthalmic observation apparatus capable of observing an observation image of a subject's eye under a plurality of observation conditions through the eyepiece lens,
A setting information acquisition unit that acquires setting information of at least one of the illumination system and the observation system according to the observation condition;
A setting information display unit for displaying the setting information acquired by the setting information acquisition unit in an observation visual field region where the observation image is observed through the eyepiece;
An ophthalmic observation apparatus.   The said setting information display part is provided in the position shifted in the perpendicular | vertical direction with respect to the optical axis of the said emitted light from the imaging position of the said emitted light imaged by the said observation system. Ophthalmic observation device.   The ophthalmic observation apparatus according to claim 1, wherein the setting information display unit is a transmissive display that is provided on an optical axis of the emitted light and transmits the emitted light.   The setting information display unit includes an image emission optical system that emits an image of the setting information toward the observation system, and an image of the setting information that is provided in the observation system and emitted from the image emission optical system. The ophthalmic observation apparatus according to claim 1, further comprising a guide optical system that guides the eyepiece lens. The observation system is provided with a variable magnification optical system that changes the magnification of the observation image,
The ophthalmic observation apparatus according to claim 1, wherein the setting information includes a magnification of the observation image. The setting information includes an index indicating at least the size of the observation object in the observation image observed in the observation visual field region,
The ophthalmic observation apparatus according to claim 5, wherein the setting information acquisition unit acquires the index corresponding to the magnification of the observation image.   The ophthalmic observation apparatus according to claim 6, wherein, when the observation object is a corneal endothelial cell, the index is a scale indicating the size and density of the corneal endothelial cell.   The setting information includes at least one of a filter inserted in the optical path of the light in the illumination system and a filter inserted in the optical path of the emitted light in the observation system. The ophthalmic observation apparatus according to any one of 7 above.   The setting information includes at least one of a diaphragm diameter of a diaphragm arranged in the optical path of the light in the illumination system and a diaphragm diameter of a diaphragm arranged in the optical path of the emitted light in the observation system. The ophthalmic observation apparatus according to any one of claims 1 to 8, which is included. An illumination system that makes light incident on the eye to be examined; and an observation system that guides the emitted light emitted from the eye to the eyepiece in response to the incidence of light from the illumination system, and is formed by the emitted light In the operation method of the ophthalmic observation apparatus capable of observing an observation image of the eye to be examined under a plurality of observation conditions through the eyepiece lens,
A setting information acquiring unit acquires setting information of at least one of the illumination system and the observation system related to the observation condition;
A setting information display step for displaying setting information acquired by the setting information acquisition unit in an observation visual field region where the observation image is observed through the eyepiece;
Method of operating an ophthalmic observation apparatus having