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。
2
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.