JPS62290436A - Ophthalmic stereoscopic microscope - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a III+ medical stereoscopic microscope that is mainly used in eye surgery, etc. and has a function particularly suitable for repairing limited corneal shapes. be.

[Prior art] Stereo microscopes are widely used for medical purposes such as surgeries and examinations, as well as for research and industrial purposes, and are useful for improving the precision and safety of surgeries. For diseases of the eye that form the eye system, appropriate treatment is taken to restore its function, but when some kind of surgery is performed on the eyeball, its shape and function cannot be restored. The major challenge is to In particular, as the number of cataract surgeries increases, how the corneal shape is restored after each surgery has become an important factor that determines the success or failure of each surgery. For this purpose, it is an extremely effective means to add a corneal shape measurement function to an ophthalmologic stereomicroscope and to observe and measure the shape of the cornea during and before and after the surgery.

[Purpose of JA Mei] The purpose of the present invention is to provide a corneal shape that serves as a reference for restoring the corneal shape of the affected eye to the optimal shape during surgery, and to use this to make comparative observations during corneal repair. The objective is to provide an ophthalmological stereoscopic microscope that allows accurate surgery.

[Summary of the invention! ] The gist of the present invention is to achieve the above objects.

In an ophthalmic stereoscopic microscope that has a pair of left and right stereoscopic observation optical systems behind the objective lens, there is an index projected toward the affected eye and the model cornea, and an image of the patient's eye and the projection of the index from the affected eye. The ophthalmological stereoscopic microscope ROM is characterized in that it has an observation means for observing a reflected image and an image of the indicator reflected from the model cornea within the same field of view.

[Embodiments of the invention]

The present invention will be explained in detail based on illustrated embodiments.

FIG. 1 shows an example of the configuration according to the embodiment, in which a common objective lens 1 is placed facing the patient [11H, and this objective lens 1
Two optical paths Oa and Ob forming the stereoscopic observation system are located behind the
are provided, and variable magnification optical systems 2a and 2b are connected from the objective lens l side.
, relay lenses 3a, 3b.

Eyepiece lenses 4a and 4b are sequentially arranged.

On the other hand, a beam splitter 5 is inserted between the objective lens 1 and the variable magnification optical system 2b in the optical path Ob of 7, so that the image in the direction of the affected eye E can be guided to the optical path Ob via a tiltable reflecting mirror 6. has been done. In addition, 7 is a ring-shaped light source provided around the objective lens 1, and 8 is an eyelid opening device placed near the affected eye E. On top of this eyelid opening device 8, for example, a complete A model angle 1lJ9 is provided which has a hemispherical surface and whose radius of curvature can be arbitrarily selected.

When observing the affected eye E, the affected eye E is illuminated using an illumination optical system (not shown). J2! The image of the eye E is the objective lens L
, the variable magnification optical systems 2m, 2b, relay lenses 3a, 3b, and eyepieces 4a, 4b are used for stereoscopic viewing by the operator. When observing the shape of the angle WiC, the corneal reflection @R, which is the so-called Mayer image, of the ring-shaped light source 7 is observed by the method described above. At this time, the surgeon judges the shape of the cornea based on the degree of distortion of the circular corneal reflection image R, but if there is distortion in the cornea C, it is difficult to judge the shape, and the shape of the corner 6c is either stapled or fuller. It is also difficult to determine whether

On the other hand, the eyelid opening device 8 is provided with a model cornea 9, on which a circular reflected image R from the ring-shaped light source 7 is shown.

is formed. This reflected image R° is also changed to W by the operator.
It is possible to make comparisons using this as a standard.

The reflected image R゛ on the model cornea 9 is the objective lens! One optical path of the observation optical system is observed from in front of the variable magnification lens 2b via the 1-reflection mirror 6 and the beam splitter 5. Note that at this time, since the reflecting mirror 6 can be freely tilted, synthesis can be performed at any observation position.

The model corner $9 is attached to the eyelid opening device 8 as shown in FIG. 2, and is made of glass, plastic, silicone rubber, or the like. In addition, if this model angle M9 is replaceable or its shape can be changed using the elasticity of the material, it can be completed in one surgery and the best shape, that is, the radius of curvature and degree of astigmatism of the surface can be freely selected. is possible. Furthermore, this model cornea 9 does not necessarily need to be attached to the open eyelid s8, but may be formed as an instrument that can be installed or attached near the affected eye E, and can be installed within the field of view of the stereo AM mirror.

FIG. 3 shows another embodiment, in which a variable magnification lens 12. Beam splitter 13, relay lens! 4. An eyepiece lens 15 is arranged in one direction, and a two-dimensional CCD 17 is provided on the reflection side of the beam splitter 13 via a projection lens 16, although illustration thereof is omitted. An image synthesizing prism 18 is arranged between the objective lens 11 and the lens E, and a light shielding plate 19 is movably provided in front of the prism 18. In addition, model corner [9 is pedestal 2
attached to 0.

When performing the surgery E, the light shielding plate 19 is appropriately moved to the position A and the ring light source 7 is turned off. As a result, only the partial image E illuminated by the illumination light source (not shown) is exposed to the image synthesis prism 18. Objective lens 11. variable magnification lens 12,
It is observed by the operator via the beam splitter 13, relay lens 14, and eyepiece lens 15.

When suturing the cornea C, the ring-shaped light source 7 is turned on,
As a result, a reflected image R by the cornea C is observed, and the cornea C
The degree of deformation can be detected. on the other hand.

This corneal reflected image R is reflected laterally by the beam splitter 13, projected onto the two-dimensional CCD 17 by the projection lens 16, and used for shape measurement. Moreover, this reflected image R is
It can also be used for observation by outsiders through monitors, etc.

Next, the reflected image R' of the ring-shaped light source 7 projected onto the model cornea 9 on the pedestal 20 can be obtained by retracting the light shielding plate 19 out of the optical path and freely changing the height of the pedestal 20.
The image synthesis prism 18 can be used to align or overlap the corneal reflection image R, making it easy to perform a comparative inspection with an accurate shape. Also.

By moving the light shielding plate 19 to position B and performing projection measurement using the two-dimensional CCD 17, comparison calculations can be made with the corneal reflection image R at any position of the variable magnification lens 12, so there is no need to worry about measurement errors due to changes in magnification. disappears. Furthermore, by measuring the position and blur of one reflected image R° on the two-dimensional CCD 17, it can be used for the 7 alignment of the device.

Furthermore, although the ring-shaped light source 7 was used as the light source for projecting onto the cornea C in the above-described embodiment, it is of course possible to use a specific light source, pattern, or the like.

[Effects of the Invention] As explained above, the ophthalmic stereomicroscope according to the present invention has a model cornea and a projection index that can be placed near the target, and can be used during corneal repair while performing surgery while comparing and observing the final target shape. Since suturing operations can be performed, one surgery can be performed accurately and easily. Furthermore, it is possible to automate alignment using the reflected image from the model cornea, and to perform measurements while correcting the observation magnification, so even greater effects can be expected.

[Brief explanation of the drawing]

The drawings show an example of an ophthalmic stereomicroscope according to the present invention,
FIG. 1 is a configuration diagram thereof, FIG. 2 is a perspective view of a model cornea installed in an eyelid opening device and attached to an affected eye, and FIG. 3 is a configuration diagram of another embodiment. 1.11 is an objective lens, 2a, 2b, 12 is a variable magnification lens, 4a, 4b, 15 is an eyepiece, 5.13 is a beam splitter, 6 is a reflection mirror, 7 is a ring-shaped light source, 8
1 is an eyelid opening device, 9 is a model cornea, 16 is a photographing lens, 17 is a two-dimensional CCD, 18 is an image synthesis prism, 19 is a light shielding plate, and 20 is a pedestal. Drawings Figure 1 Figure 2 Figure 3 15~ [+]

Claims (1)

[Scope of Claims] 1. In an ophthalmic stereomicroscope having a pair of left and right stereoscopic observation optical systems behind an objective lens, an index projected toward the affected eye and a model cornea, and an image of the affected eye and the index 1. An ophthalmological stereomicroscope, comprising observation means for observing a reflected image from the affected eye and a reflected image of the indicator from the model cornea within the same field of view. 2. The observation means includes image synthesis means for superimposing or juxtaposing the reflected image of the index from the affected eye and the reflected image from the model cornea within the same visual field.
The ophthalmologic stereomicroscope described in Section 1. 3. The ophthalmologic stereomicroscope according to claim 1, wherein the observation means includes an imaging means. 4. The ophthalmologic stereomicroscope according to claim 3, wherein the imaging means includes a measuring means. 5. The ophthalmologic stereomicroscope according to claim 1, wherein the model cornea is attached to an eyelid opening device. 6. The ophthalmologic stereomicroscope according to claim 1, further comprising comparison means for measuring the reflected image of the indicator by the model cornea and comparing the measured value of the reflected image of the indicator by the affected eye.