The spot of light describes a circular path when the lens assembly is rotated .
当透镜系统旋转时，光点画出一个圆形轨迹。
2
Conclusion Continuous circular capsulorhexis and emulsification of lens nucleus are critical to this surgery.
结论连续环形撕囊和乳化晶状体核是乳化手术的关键。
3
The circular symmetric point and the apalanatic point of spherical lens have one same expression, however the two kinds conjugate point are belong to difference category.