Aspheric glasses lens determination method for myopic presbyopia correction

Abstract

The invention relates to an aspheric glasses lens based on the wavefront technology and physiological data of human eyes and aims to correct shortsightedness and farsightedness of people with presbyopia. By measuring wavefront aberration and eye axis data of human eyes practically, combining a Liou ideal human eye model and utilizing optical design software, a personalized eye model according with practical optical characteristics of human eyes is built. Considering quite weak accommodative strength of people eyes with presbyopia, goggling of eyeballs when people eyes are in far sight and short sight and adjustment of crystalline lens during short sight, the lens is designed into a spheric-cylindrical and aspheric type, the integral lens-eyes system is optimized at different vision field, and finally, the aspherical lens structure and diopter parameters in accordance with vision characteristics of normal eyes. The aspheric glasses lens is practical and has the advantages of objectiveness, correctness, simple design and high accuracy.

Description

technical field [0001] The invention belongs to the technical field of vision correction, in particular to an aspheric spectacle lens based on wavefront technology and eye axis data. Background technique [0002] When myopia is young, its far point is at a finite distance from the human eye, and it needs to wear a negative lens to see objects that are infinitely far away. As the age increases, the near point of myopia will become farther and farther away from the human eye. , when the near point after wearing a negative lens exceeds the photopic distance or working distance, presbyopia will appear. At this time, it is necessary to wear a positive lens to move the near point forward to within the photopic distance or working distance. In order to realize that the human eye can see far and near clearly at the same time, bifocal mirrors, triple light mirrors and progressive multifocal lenses have appeared successively. [3] . However, bifocals often cannot see objects in the m...

AI Technical Summary

Problems solved by technology

However, bifocals often cannot see objects in the middle distance clearly, and there is a clear dividing line on the lens, and there will be a feeling of "jumping" when looking at distance and near alternately, and there is no sense of spatial continuity.

Although the three-light mirror takes into account the correction of intermediate vision, there is still an image jump phenomenon at the dividing line, and it cannot obtain continuous vision throughout the whole process. There is no essential difference from the double-light mirror.

Although the progressive multi-focal lens realizes the continuous vision of the whole process, it is expensive, and there are deformation areas under the left and right sides of the lens, which makes the image blurred and irregular, and it takes a long time for the wearer to adapt

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