目前常见的衍射型或折射型多焦人工晶体能够为患者提供一定范围内不同距离的视力, 但也造成了视网膜图像质量的下降。提出了一种新型的非球面人工晶体设计方法, 使双眼中的主导眼在瞳孔较大时保持良好的远视力, 同时通过球差优化使该眼在瞳孔较小时获得一定范围的近视力; 非主导眼在瞳孔较大时保持良好的近视力, 同时通过球差优化使该眼在瞳孔较小时获得一定范围的远视力。当双眼注视不同距离物体时, 都将获得良好的双眼视力, 同时由于双眼视网膜像比较接近, 双眼视功能不会受到影响。报道了基于由非球面角膜和晶状体组成的模型眼, 采用ZEMAX软件进行光线追迹, 通过球差优化获得基于双眼平衡单眼视的非球面多焦人工晶体的设计结果。

Multifocal intraocular lenses which mainly include diffractive type and refractive type can provide patients with good vision in varius distances. But they also result in image quality reducing. This article suggest a new design method of aspherical intraocular lens. In this method, when pupil is lager, the dominant eye will keep a better vision of far distance, at the same time, get vision of near distance; or make the undominant eye keep a better vision of near distance and get vision of far distance. When two eyes observe objects of different distance, good binocular vision will always be gained and the visual ability of both eyes will not be influenced. We will also report the ZEMAX raytracing results on model eyes which consist of aspherical cornea and nature lens, and the optimized results based on the balance of binocular vision.