JPS6222641A - Assembling type intraocular lens - 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 [Field of Industrial Application] The present invention relates to an intraocular lens implanted into the eye of a cataract patient after lens extraction.

[Description of the Prior Art] Conventionally, the material for intraocular lenses has generally been synthetic fibers or synthetic resins, such as polymethyl methacrylate, polypropylene, polyvinylidene fluoride, and polyamide, which are compatible with the living body and have elasticity, for the support portion. The optical part uses highly transparent synthetic resins such as polymethyl methacrylate and polyhydroxyethyl methacrylate, and it is assumed that the intraocular lens will never be removed after it is implanted into the eye. There was a fixed idea that there was no opportunity to separate from the club.

[Problems to be solved by the invention] However, when an intraocular lens is implanted into the eye, adhesion and proliferation of cells occur on the optical surface, which may cause the optical surface to become cloudy and lead to decreased visual acuity. be.

In addition, after implantation of an intraocular lens with surgery that leaves the crystalline lens in place,
The posterior part may become a white film called a secondary cataract, and one way to treat this is to use laser irradiation to destroy this posterior part by 2 to 3 millimeters around the visual axis and make a hole. Surgery began.

However, this laser irradiation sometimes damages the optical part of the intraocular lens, which may result in decreased visual acuity.

To treat the above-mentioned problems, the intraocular lens can be replaced by surgery, but if the intraocular lens has been implanted for many years, it is not recommended to remove the intraocular lens from within the eye. It is often an extremely difficult surgery.

This is because the part of the support part that is in contact with the living tissue becomes adhered to the living tissue, and it is extremely difficult to cut it open, separate the support part from the living tissue, and remove it.

[Means for Solving the Problem 1] Therefore, in the assembled human intraocular lens of the present invention, the support part having the part that contacts the living tissue of the intraocular lens already implanted in the eye remains in the eye, and the optical part is removed. , is what you are trying to replace.

[Example 1] As an example of the present invention, FIG. 1 shows a support section, and FIG. 2 shows an optical section. In other words, the optical part shown in Figure 2 is assembled on the support part shown in Figure 1 to form one intraocular lens.
This makes it possible to separate and assemble the optical part from the support part.

A in FIG. 1 is a support part that is integrated with the annular lens stand B. A protruding portion C is provided on the outer periphery of the annular lens stand B of this supporting portion, and is used for holding the optical part joint. FIG. 3 is a sectional view taken along the line 1--2 for fixing the optical part in FIG. 2, and shows that the optical part N is provided with two protrusions for fixing the optical part.

In other words, these L in FIG. 3 are respectively fitted into the gap D in the protrusion C in FIG. is joined and held.

Further, the protruding portions indicated in -1-, C in Fig. 1, L in Figs. 2 and 3, may have sufficient elasticity and shape for separation and assembly. As mentioned above, the material of the intraocular lens has elasticity that allows for separation and assembly.

Note that the holes J in FIG. 1 and H in FIG. 2 are used for assembling a separation assembly using an instrument for implanting an intraocular lens and for rotating an intraocular lens.

[Effects of the Invention] Hereinafter, when the assembled human intraocular lens of the present invention, in which the optical part and the support part can be separated and assembled, is implanted into the eye as explained above, when the function of the optical part deteriorates, The optical part can be extracted and replaced, and if the patient has astigmatism before the optical part replacement surgery, a lens for correcting astigmatism can be assembled.

In other words, by implanting the assembled human intraocular lens of the present invention into the eye, the lens part can be replaced within the eye while leaving the anterior chamber declination, posterior chamber inclination, or support part in the lens capsule. The risk burden is reduced, the operation becomes easier, and the operation time can be shortened.

This assembled human intraocular lens requires separation and assembly surgery only when the optical part needs to be replaced; during the first assembled human intraocular lens implantation surgery, the supporting part and the optical part remain assembled together. , conventional transplant surgery can be performed.

[Brief explanation of the drawing]

FIG. 1 is a front view of the support section of the present invention. FIG. 2 is a front view of the optical section of the present invention. FIG. 3 is a cross-sectional view of the optical part in FIG. 2 of the present invention taken along the line 2-2.

Claims (1)

[Claims] An assembling intraocular lens characterized in that the intraocular lens can be separated or assembled from each other by a joint part with an optical part provided in the support part and a joint part with the support part provided in the optical part.