Constant deviation prism is a turning element which can invariably transform the propagating direction of the light beam.
恒偏向棱镜是指能恒定改变光束传输方向的转向元件。
The linear measurement principle of flattened diameter of the ocular cornea and the location deviation of the cone prism which is used in the applanation tonometer are introduced.
介绍了用于压平眼压计的圆台压平棱镜进行角膜压平直径线性测量原理及定位偏差分析；
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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