英语语法分析

The prism effect was put on the right and left lenses averagely by 1/2-1/3 degree of exophoria.

左右镜平均有1/ 2-1/3度的镜筒外加棱镜效应。

The prism effect produced by moving optical center of presbyopic glasses was put on the right and left lenses averagely by 1/2-1/3 degree of exophoria.

通过移动老视镜的光学中心的方法，产生三棱镜效应，按外隐斜度数的1/2～1/3给予三棱镜度，平均加在左右2眼。