Liu Yongji, Wang Yan
J Opt Soc Am A Opt Image Sci Vis. 2019 Apr 1;36(4):B103-B109. doi: 10.1364/JOSAA.36.00B103.
This paper aims to compare the image quality between centration on the coaxially sighted corneal light reflex (CSCLR) and on the entrance pupil center (EPC). Myopic laser ablation was simulated on eye models, and the optical performances were compared. Centration on the EPC leads to higher wavefront aberrations and lower modulation transfer function. The two centration methods give nearly identical retinal images for angle kappa less than 5°. Because of less tissue removal, centration on the EPC is probably preferable for angle kappa less than 5°, but CSCLR centration may be preferable for angle kappa larger than 5°. The degree of tilt of the post-surgery anterior corneal surface explains the differences between the two methods.
本文旨在比较同轴视轴角膜反光点（CSCLR）对中与瞳孔中心（EPC）对中之间的图像质量。在眼部模型上模拟近视激光消融，并比较光学性能。EPC对中会导致更高的波前像差和更低的调制传递函数。对于kappa角小于5°的情况，两种对中方法产生的视网膜图像几乎相同。由于组织切除较少，对于kappa角小于5°的情况，EPC对中可能更可取，但对于kappa角大于5°的情况，CSCLR对中可能更可取。术后角膜前表面的倾斜程度解释了两种方法之间的差异。
