JPH061701Y2 - Ophthalmic surgery lens - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an ophthalmic surgical lens. More specifically, under ophthalmic surgery, especially in a poor corneal state (corneal transplant surgery, corneal refractive surgery, corneal astigmatism surgery, keratoconus eye, etc., the same applies below), intraocular surgery (cataract surgery, vitreous surgery, retinal surgery). , Intraocular insertion surgery, etc. The same shall apply hereinafter).

[Prior Art] Conventionally, there is a problem in that it is difficult to perform an ophthalmic surgery, particularly when performing an intraocular surgery in a state where the cornea is in a bad state. That is, under poor corneal conditions,
When performing an intraocular surgery, there is a problem that light is diffusely reflected because the aqueous humor surface is wavy, and it is difficult to observe this through a microscope, and the microscope is an obstacle to the surgery.

[Problems to be Solved by the Invention] In view of the above circumstances, the present invention provides a surgical lens that facilitates observation and further facilitates surgery during intraocular surgery after corneal resection. With the goal.

[Means for Solving the Problems] According to the present invention, the outer surface of the lens portion has a convex surface, the inner surface has a concave surface, and both surfaces have a curvature close to that of the cornea, and the surgical opening is a lens. It is characterized in that one operation portion for holding the lens is opened at a portion other than the center of the lens portion and is connected to a portion of the lens portion on the side substantially opposite to the opening with the lens center interposed therebetween.

[Operation] In corneal surgery, when the operating portion of the surgical lens of the present invention is placed on the aqueous humor in the eye after excision of the cornea,
There is no diffuse reflection on the water surface of the aqueous humor, and because the operation part and the opening are formed away from the center of the lens, observation of the inside of the eye is facilitated, and surgical tools are inserted through the opening of the lens. Therefore, intraocular surgery can be easily performed.

[Embodiment] Next, an embodiment of the present invention will be described.

FIG. 1 is a plan view of a surgical lens according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line (I)-(I) in FIG. 1, and FIG.
The figure is an explanatory view of the usage state of the surgical lens of the present invention.

1-2, (A) is a surgical lens according to an embodiment of the present invention, (1) is a lens portion of the surgical lens (A),
(3) is an opening and (4) is an operation part.

(Regarding lens section (1)) The lens section (1) is a lens with almost zero power (degree). However, it may have power if necessary. The material may be a material normally used as a contact lens. So for example PM
MA, HEMA, silicone resin and other transparent materials can be used. Furthermore, it is also possible to contain a dye, an ultraviolet absorber or the like.

The shape of the lens part (1) is preferably a curved surface shape close to the curved surface of the cornea as a whole in terms of operability and observability. However, a flat surface (plate shape) is also possible. The edge part (2) around the lens part (1) is preferably rounded and chamfered so as not to damage the eyes during operation.

The size of the lens part (1) should be larger than the corneal incision because it is placed at the position of the incised cornea (on the sclera).
Usually, the diameter is about 8 mm to 15 mm.

(Regarding the opening (3)) As shown in FIG. 3, the opening (3) is used for observing the inside of the eye from the center of the lens part (1) and inserting the surgical instrument (B) from there to perform surgery. Is what is used. Therefore, the position, size, and number are preferably set as follows.

In order to observe the inside of the eye from the vicinity of the center of the lens (1), the position of the opening (3) is preferably provided at a position other than the center. Further, from the viewpoint of operability during surgery, it is preferable to provide it on the side substantially opposite to the operation part (4) with respect to the center of the lens part (1).

The size of the opening (3) may be such that the surgical instrument (B) can be easily operated during surgery, but if it is too large, it will be difficult to observe, so a diameter of about 2 to 5 mm is preferable.

The shape of the opening (3) is not particularly limited, but a substantially circular shape or an elliptical shape is preferable from the viewpoint of easy manufacturing.

A desired number of openings (3) can be provided according to the number of surgical tools and the like.

(Regarding the operation section (4)) As shown in FIG. 3, the operation section (4) holds the present lens (A) at a desired position in the eye during observation and surgery.
Used by examiners and surgeons to carry. Therefore, the position of the operation part (4) should be adjusted so that it does not interfere with observation.
It is preferably provided in the peripheral portion of (1). Further, as shown in FIGS. 1 and 2, the shape preferably projects from the lens surface at an angle α (α <about 90 °) and bends outward in the middle. It is not always necessary to provide this bent portion, but it is preferable to provide it because it is easier to hold it.

The size and length of the operation unit (4) are not limited as long as they do not hinder the operation. As the material of the operation part (4), the same material as that of the lens part (1) can be used. The operation part (4) may be formed integrally with the lens part (1), or may be connected by fitting means, screw means, or the like.

(Usage method) FIG. 3 shows a usage state of the surgical lens (A). The operating lens (A) is placed on the eye (D) with the operating section (4) being grasped by the finger (E) of the examiner or operator. Then, an appropriate surgical tool (B) is inserted from the opening (3) to perform an operation.
At this time, since the aqueous humor surface (C) is held down by the lens (A), diffuse reflection is eliminated, and surgery and observation are facilitated.

[Effect of the Invention] According to the present invention, the following advantages are exhibited.

It is easy to observe because there is no irregular reflection on the water surface.

The lens is easy to hold because it has an operating part.

Since it has an opening, surgery can be performed while observing.

[Brief description of drawings]

FIG. 1 is a plan view of a surgical lens according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line (I)-(I) in FIG. 1, and FIG.
The figure is an explanatory view of the usage state of the surgical lens of the present invention. (Main symbols in the drawing) (A): Lens for ophthalmic surgery (1): Lens part (3): Opening part (4): Operation part

 ─────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-56-132950 (JP, A) JP-B-62-43694 (JP, B2)

Claims (2)

[Scope of utility model registration request] 1. An outer surface of the lens portion has a convex surface, an inner surface has a concave surface, both surfaces have a curvature close to that of the cornea, and an operation opening is provided at a position other than the center of the lens portion. A lens for ophthalmologic surgery, wherein one operating portion for holding the lens is connected to a portion of the lens portion on the side opposite to the opening with the center of the lens interposed therebetween. 2. The lens for ophthalmic surgery according to claim 1, wherein the operating portion is provided so as to bend in the outer direction of the lens portion in the middle thereof.