Koretz J F, Handelman G H
Vision Res. 1983;23(12):1679-86. doi: 10.1016/0042-6989(83)90183-9.
An explanation of the mechanism of visual accommodation depends heavily on understanding the mechanical properties of the lens, as well as the way in which its shape is altered in small accommodative changes. An initial attempt to relate these properties to a mechanism has already been performed (Koretz and Handelman, 1982) for the young (age 11 yr) human lens, using certain simplifying assumptions (spherical curvature on the anterior lens surface and elastic isotropy). However, since it has been shown that the lens behaves as an anisotropic body, the previous treatment has been extended to include the variation of lens elastic properties in the polar and radial directions. With this modified representation, it is found that only one combination of elastic constants is consistent with the generally accepted qualitative theory of accommodation and with clinical data on the accommodative range of the emmetropic age 11 human eye. For this unique solution of the equations, however, the general mechanism already suggested by us, which includes support by the vitreous and alteration of the magnitude and angle of application of zonular force with accommodation, remains little changed.
视觉调节机制的解释在很大程度上依赖于对晶状体机械特性的理解，以及其形状在小幅度调节变化中改变的方式。对于年轻（11岁）人类晶状体，已经有人（科雷茨和汉德尔曼，1982年）使用某些简化假设（晶状体前表面的球面曲率和弹性各向同性），对将这些特性与一种机制联系起来进行了初步尝试。然而，由于已经表明晶状体表现为各向异性体，之前的处理方法已被扩展，以包括晶状体在极向和径向弹性特性的变化。通过这种改进的表示方法，发现只有一种弹性常数组合与普遍接受的调节定性理论以及正视眼11岁人群眼睛调节范围的临床数据相一致。然而，对于该方程组的这个唯一解，我们之前提出的一般机制，即包括玻璃体的支撑以及随着调节而改变小带力量的大小和施加角度，仍然变化不大。
