Amano S, Tanaka S, Shimizu K
Division of Ophthalmology, Musashino Red Cross Hospital, Tokyo, Japan.
J Cataract Refract Surg. 1994 Nov;20(6):616-9. doi: 10.1016/s0886-3350(13)80649-9.
We evaluated the centration of excimer laser myopic photorefractive keratectomy by analyzing the corneal topography in 60 eyes of 37 patients. Computer-assisted analysis of corneal topography was performed preoperatively and one week postoperatively. The distance and the direction from the center of the entrance pupil to the center of the ablation was calculated using a personal computer. Downward displacement of the ablation relative to the center of the entrance pupil was observed in 51 eyes (85%). The mean distance of the center of the ablation from the center of the entrance pupil was 0.51 +/- 0.31 mm (range 0.06 mm to 1.64 mm). To achieve more precise centration, we recommend applying an eye-movement tracking system to photorefractive keratectomy.
我们通过分析37例患者60只眼的角膜地形图来评估准分子激光近视性屈光性角膜切削术的中心定位情况。术前及术后1周进行计算机辅助角膜地形图分析。使用个人计算机计算从入射瞳孔中心到消融中心的距离和方向。51只眼（85%）观察到消融相对于入射瞳孔中心向下移位。消融中心到入射瞳孔中心的平均距离为0.51±0.31mm（范围0.06mm至1.64mm）。为了实现更精确的中心定位，我们建议在屈光性角膜切削术中应用眼动跟踪系统。
