Equipment for customizing individualized contact lenses

Abstract

A device used to prepare personalized contact lenses is prepared as using uniform lightening system to generate parallel lightening light, passing said light through grey image generating system and using computer to control said generating system to generate grey image, using projection system to image grey image on image work piece table, using aligning system to regulate said table to correct position for exposing photo resist on sample according to grey grade, developing and etching exposed sample to obtain component with continuous relief structures on spherical surface then using said component to prepare personalized contact lenses.

Description

technical field [0001] The invention relates to a custom-made device for personalized contact lenses, which is a technical equipment for making personalized contact lenses by etching microstructures on a spherical surface through maskless photolithography technology. technical background [0002] It has long been recognized that the normal human eye is not a perfect refractive system, and there is a certain degree of aberration, which reduces the quality of retinal imaging and limits visual sensitivity. Except spherical mirrors and cylindrical mirrors can be corrected by frame glasses, contact lenses and other devices, there is no accurate and effective device to correct high-order aberrations such as coma and spherical aberration. [0003] In 1962, Smirnov first proposed the high-order aberration characteristics of the eye, and pointed out that the aberrations of the human eye can be corrected by individualized lenses. The David Williams laboratory has done corresponding r...

AI Technical Summary

Problems solved by technology

[0005] (1) According to the contribution of each order aberration to the correction, it is necessary to process a continuous relief microstructure on the material, and the general processing method is not easy to meet the requirements;

[0006] (2) The high-order aberrations of the human eye vary greatly, and the correction of high-order aberrations is not as universal as the correction of low-order aberrations

However, since the obtained contact lens needs to be worn close to the eyeball, and the correction of ordinary diopter needs to be considered, the lens must have a spherical structure, which requires continuous relief microstructures to be etched on the spherical surface instead of the usual photolithographic plane, However, the patented technology of ASML cannot solve the problem of spherical projection exposure.

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