JPS62643Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a part that comes into contact with the eyeball in an ophthalmic microscope for magnifying observation or photographing the inside of the eyeball.

In this type of microscope, the objective lens is equipped with a cone lens at the tip, and the tip surface of the cone lens is brought into contact with the pupil cornea directly or through an immersion liquid layer, and the objective lens is placed in contact with the cornea of the pupil either directly or through an immersion liquid layer, and the objective lens is placed in contact with the cornea of the pupil either directly or through an immersion liquid layer. Normally, the illumination light is guided into the eyeball by moving backwards through the lens, and the optical system is focused on the distance to the site to be examined for observation or photography.

Among these methods, when the cone lens is placed in direct contact with the cornea, the cornea is compressed and distorted over the entire tip of the lens, causing wrinkles to form on the cornea and obstructing observation, and eye oil and foreign matter to the tip of the lens. Due to the large difference in refractive index between the tip of the lens and the cornea, illumination light may be reflected there, reducing the quality of the image to be examined, or the reflected light may narrow the field of view or cause excessive contact pressure. There are problems such as damaging the eyeballs.

The method of interposing an immersion liquid layer between the cone lens and the cornea was first invented by the present inventor and published in a patent application filed in 1973.
56560 (Japanese Unexamined Patent Publication No. 55-148531), the method is a method in which an annular surrounding wall is provided protruding from the tip surface of a cone lens, and the inside of the wall is filled with immersion liquid. The wall is brought into contact with the cornea. According to this method, it is possible to prevent the formation of wrinkles on the cornea and to reduce the risk of damaging the eyeball. Although this makes it possible to solve the negative effects of reflection, it also makes it difficult to remove eye oil etc. that adheres to the tip of the cone lens, and there are problems such as air bubbles entering the immersion liquid and interfering with the inspection. There is.

The purpose of this invention is to facilitate the removal of eye oil and air bubbles by replacing the dipping liquid at any time in the method of the above-mentioned patent application that uses a dipping liquid layer. I will explain.

1 indicates the eyeball, 2 the cornea, 3 its endothelial cell layer, and 4 the crystalline lens. Reference numeral 5 denotes an objective lens barrel of the microscope, which supports a cone lens 6 protruding from its tip. An adapter 7 is attached to the optical end of the cone lens 6.

The adapter 7 includes a support portion 7A that is fitted onto the distal end of the cone lens 6, and an annular portion 7 that surrounds the distal end surface 6A of the cone lens and whose apex abuts against the cornea 2.
A closed space 8 is formed by the surface of the cornea 2, the cone lens tip surface 6A, and the inner surface of the annular portion 7B. The thickness of this space is 2-4
mm.

The support portion 7A of the adapter 7 includes a pipe connection portion 9.
This tube connection 9 is connected to the space 8 by a narrow channel 10 formed in the support portion 7A. A thin flexible tube 11 is connected to the tube connection part 9, and this flexible tube 11 passes through a manual pot 12 and reaches an Irrigator 13.
3 is filled with an immersion liquid 14 such as physiological saline, and this immersion liquid 14 reaches the space 8 .

Note that the tip of the flexible tube 11 may be left open, and the immersion liquid 14 may be introduced into the space 8 through the flexible tube 11 using a syringe or dropper when necessary.

In the above-mentioned apparatus, the corneal endothelial cell layer 3 is illuminated by the light beam 15 that is passed backwards through the microscope, and is observed or Take a photo. In that case, the cone lens tip surface 6
When A is in contact with or very close to the cornea 2, the reflected light 17 of the illumination beam 15 at the tip surface 6A
Since the light almost overlaps the optical path 16, the field of view is significantly narrowed due to the obstruction, but if the height of the annular portion 7B is selected to be about 2 to 4 mm, the reflected light 1 can be removed from the optical path 16.
7 is sufficiently far away, making it possible to observe and photograph with a wide field of view. In this case, the contact pressure on the cornea 2 can be significantly reduced compared to the case where the cone lens optical end surface 6A is brought into direct contact.

If eye oil or air bubbles get into the space 8 during observation or photography, open the tip 12 and pour the immersion liquid 14 into the space 8 while keeping the annular part 7B in contact with the cornea 2. By force-feeding, it is possible to expel eye oil, air bubbles, etc., and to wash the eyes.

Therefore, with this invention, if observation or photography is obstructed by eye oil or air bubbles, the foreign matter can be quickly removed without removing the device from the eyeball, improving inspection efficiency. It can improve the patient's pain and reduce the pain of the patient.

[Brief explanation of the drawing]

The figure is a sectional view of an embodiment of this invention. 1...Eyeball, 5...Objective lens barrel, 6A...
Cone lens tip surface, 7B... annular bulge, 14...
...Immersion liquid.

Claims (1)

[Scope of utility model registration request] In an ophthalmic microscope equipped with an objective lens configured such that its distal end faces the eyeball through a liquid layer,
Height 2 to 4 mm forward from the tip of the objective lens above.
An ophthalmic microscope comprising a protruding annular ridge and an immersion liquid supply conduit between an internal space surrounded by the annular ridge and the outside world.