Intraocular lens

Abstract

An intraocular lens of a novel structure exhibiting an excellent focus adjusting power. A hollow capsule structure is filled with a transparent liquid-like or gel-like filler (32). Front wall of the capsule structure is composed of a flexible lens front film (16), and the rear wall of the capsule structure is composed of an optical lens (18) having a diameter larger than that of the flexible lens front film (16). Under a state inserted into and attached to a capsula lentis, the pressure variation of a corpus vitreum acts on the optical lens (18) to enable focal refraction power to be adjusted by utilizing swelling deformation of the lens front film (16).

Description

technical field [0001] The invention relates to an intraocular lens inserted into the lens capsule of the eye, in particular to an intraocular lens with focus adjustment function. Background technique [0002] In the past, surgical techniques for cataracts and the like used an operation in which the lens inside the eye capsule was removed through an incision made in the eye tissue of the cornea (sclera), or the anterior capsule of the lens, and an intraocular lens to replace the lens was inserted through the incision to place it in the capsule. [0003] To date, the intraocular lenses used have been single focus lenses lacking a focus adjustment function. The problem that arises is that the ocular function lacks focus accommodation power when vision is restored postoperatively. [0004] Therefore, the intraocular lens such as the following has been designed and proposed in the past as the intraocular lens having a focus adjustment function. [0005] For example, a lens ha...

AI Technical Summary

Problems solved by technology

However, the intraocular lens disclosed in this prior art document is similar to the previously discussed Patent Document 2 in that the optical lens produces only a slight displacement in the front-back direction, and thus cannot achieve a sufficient accommodation function.

In addition, postoperatively the lens capsule shrinks and fuses to the intraocular lens, so there is also a risk that the lens capsule will inhibit the movement of the optical lens and no longer have adequate accommodative function

Images