An ultra-thin zero spherical aberration implantable lens for myopia

Abstract

The invention discloses an ultra-thin zero-spherical-aberration implantable myopia lens. The lens is made of transparent hydrophilic polymethacrylate material, and includes an optical zone of the lens and plate-shaped supporting haptics along the edge of the optical zone of the lens. , used for surgical implantation to correct the vision of myopia. The implantation position is located behind the iris and before the natural lens (ciliary sulcus). The optical zone of the lens of the present invention is composed of a plano-concave optical surface, has an ultra-thin axial thickness, and increases The gap between the lens and the natural lens is reduced, the risk of post-cataract is reduced, and at the same time, it is convenient for surgical implantation or removal; the optical zone of the lens of the present invention has zero spherical aberration distribution, and does not cause total spherical aberration of the human eye after implantation Changes, correcting vision while increasing the natural comfort of the patient's eyes after surgery.

Description

technical field [0001] The invention relates to the technical field of production and manufacture of phakic intraocular lenses, in particular to a design method for an ultra-thin zero spherical aberration implantable myopic lens sheet. Background technique [0002] According to a research report released by the World Health Organization in 2018, the proportion of myopia population in my country ranks first in the world, and the myopic population is as high as 600 million. Myopia among young people is a major problem that plagues contemporary families. Today, we have mastered many ways to correct myopia. The easiest way is to wear glasses. Although wearing glasses is very effective, there are many situations in life that are inconvenient or not recommended to wear glasses. For example, when a myopic patient enters a room in a cold environment, water mist will form on the surface of the glasses; another example For extreme sports athletes, glasses slipping can be dangerous. ...

AI Technical Summary

Problems solved by technology

However, for the same material and the same clear aperture, the higher the degree of myopia lens, the thickness of the edge is still thicker (limited by the spherical surface), and the safety gap between the lens and the natural lens is difficult to further increase

In U.S. Patent US20070162118A1, George et al. made a smooth chamfer on the upper surface optical zone and the haptic junction on the iris side, reducing the thickness of the edge of the optical zone, but sacrificing the size of the effective optical zone

[0004] At the same time, the implantable myopia lenses on the market are all spherical. For example, the ICL of STRRA Surgical and the PRL of Yijing Company are all spherical designs. Spherical aberration is inherent in spherical lenses.

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