Posterior chamber type artificial crystal

Abstract

The invention relates to a posterior chamber type artificial crystal, which comprises an optical part and at least two loops, wherein the optical part consists of an optical part body and an optical part edge; and the loops are connected with the optical part. The rear surface of the optical part is a convex sphere, and the curvature radius of the optical part is in a range of 6.6-80.0 millimeters. Compared with the posterior chamber type artificial crystal in the prior art, the design of a highly convex rear surface (a small curvature radius) for the optical part of the posterior chamber type artificial crystal is adopted, a distance between the rear surface of the optical part of the artificial crystal and a rear sac is shortened, the stability of the artificial crystal in the space position of the sac is improved, the advantage of the square edge effect on the optical part edge of the artificial crystal is enabled to be better presented, and the morbidity of PCO (posterior capsular opacification) is reduced after the artificial crystal is implanted; and since the front surface of the optical part is slightly flat, the loops of the artificial crystal (particularly the loops of a one-piece posterior chamber type artificial crystal) are enabled not to be tightly pressed onto the front surface of the optical part during folding, the loop is more easily unfolded after being implanted into an eye, and the situation of mutual adhesion between a support loop and the optical part cannot occur.

Description

technical field [0001] The present invention mainly relates to posterior chamber intraocular lenses. Specifically, the present invention relates to a posterior chamber type in which the rear surface of the optical part is obviously convex, which can improve the stability of the spatial position of the intraocular lens in the capsular bag and can reduce the incidence of posterior capsule opacity (PCO) after implantation of the intraocular lens. artificial lens. Background technique [0002] An intraocular lens (IOL) is an artificial lens that can be implanted in the eye to replace the natural lens in a person's eye that is clouded by cataract disease, or used in refractive surgery to correct the eye's vision. The shape of the intraocular lens is usually composed of a circular optical part and supporting haptics arranged around the periphery. The optical part of the intraocular lens consists of the optic part and the edge of the optic part. IOLs made of soft material, often...

AI Technical Summary

Problems solved by technology

If the edge of the optical part is too thick, it will increase the total volume of the IOL and increase the difficulty of small incision surgery; if the supporting loop is too thin, the force between it and the capsule is not enough, and the IOL will not be stable in the capsule; if the right angle The edge step is too small to prevent the migration of lens epithelial cells

[0017] Due to the inconspicuous kyphosis of the optical part of the prior art spherical intraocular lens (or even a flat shape), there will be a large gap between the posterior surface of the intraocular lens and the posterior capsule of the human eye after being implanted into the human eye, resulting in artificial The positioning of the lens is not stable, which also makes the posterior capsule opacity prone to occur after surgery

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