Scale Model of Human Eye

Design of Scale-Model Eye

尺度模型眼睛的设计

The scale model eye was developed by scaling an actual cross-sectional picture of an eye from Light & Vision by Mueller & Rudolph. Then a total distance of 2.4 cm from cornea to retina was adopted from Hecht, along with his values for the indices of refraction for all components. The actual measurements for radii of curvature and separation were scaled using a solver program (TK!Solver) until a parallel incoming ray fell on the retina. It is not known whether the eye shown by Mueller&Rudolph is typical.

尺度模型眼睛是根据Mueller & Rudolph在《Light & Vision》中提供的实际横截面图进行缩放而开发的。然后采用了Hecht提出的从角膜到视网膜总距离2.4厘米，以及他对于所有组件折射率的数值。通过求解程序（TK!Solver）对曲率半径和间距的实际测量值进行缩放，直到入射平行光落在视网膜上。不清楚Mueller & Rudolph所展示的眼睛是否具有代表性。

Accommodation Model

适应模型

Being inherently a thick lens problem, image formation by the eye can be approached using a system matrix. By modeling the fixed portion of the eye with a matrix, assuming the front surface of the crystalline lens to be fixed, then the thickness and back surface power of the lens can be varied to study the accommodation process.

由于本质上是一个厚透镜问题，眼睛的成像过程可以使用系统矩阵来处理。通过将眼睛的固定部分建模为一个矩阵，并假设晶状体的前表面固定，然后可以调节透镜的厚度和后表面的功率，以研究调节过程。

By computing the system matrix for the entire imaging process, constraining the image to fall on the retina, the object distance on which the eye is focused can be calculated. (If an image is to be formed, the object distance must be negative since the Cartesian sign convention is used.) Alternatively, by choosing and object distance, the required back surface power can be calculated.

通过计算整个成像过程的系统矩阵，并将图像限制在视网膜上，可以计算出眼睛聚焦的对象距离。（如果要形成图像，对象距离必须为负值，因为使用了笛卡尔符号约定。）或者，通过选择对象距离，可以计算出所需的后表面功率。