为了更加符合眼睛的解剖学结构，用建立的层状结构晶状体模型代替了Hway-Lan Liou眼模型中的折射率连续变化的晶状体模型，从而建立了新的眼睛模型。在这个新的层状晶状体模型中，最外层前后表面的非球面系数与解剖学数据相符。由于层状结构使光线追迹具有特殊性，因此用C语言编制了光线追迹程序，并对此眼睛模型的光学性质进行了研究。结果表明，晶状体层数较少时，眼睛的球差曲线出现翼状结构，即层状晶状体的引入使眼睛具有多焦性，并对这种现象进行了解释；具有层状结构晶状体的眼睛和具有折射率连续变化的晶状体的眼睛能够给出等价的球差结果。

A human eye model based on anatomical data, which had been previously proposed by Hwey-Lan Liu, has been transformed into a new eye model considering the laminated structure of the lens. The anterior surface of the lens is prolate, whereas the posterior surface of the lens is oblate which is consistent with the anatomical data. A numerical program was written in C computer language to study the refractive structure of the eye and the optical characters of the model have been studied. The marginal wings appear in the longitude spherical aberration plot when the shell number is small, which means a lens with a small number of shells makes eyes a multifocal system. The result shows that eye with gradient-refractive-index-lens and that with shell-lens can get equivalent spherical aberration results.