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。
The deviation degree and visual function examination were performed by the synoptophore and prism pre- and post-operation in 128 concomitant strabismus patients.
对1 2 8例共同性斜视患者应用同视机、三棱镜分别进行术前、术后斜视度检查、视功能检查，分析结果。
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