Hanna K D, Chastang J C, Pouliquen Y, Renard G, Asfar L, Waring G O
IBM Scientific Center, Paris, France.
Arch Ophthalmol. 1988 Feb;106(2):245-50. doi: 10.1001/archopht.1988.01060130259039.
We performed argon fluoride excimer laser (193-nm) superficial keratectomy for myopia on human donor eyes and on a resected corneal disc. The laser beam was shaped by a rotating slit to produce a circular ablation 7.5 mm in diameter, with a mathematically defined profile to correct myopia. The fluence at the surface of the cornea was 200 mJ/cm2; the laser was fired at 20 Hz. Each 4.5-mJ laser pulse etched a 0.17-micron deep image of the slit in the cornea. Since the slit moved (0.03 Hz), each successive pulse etched an area adjacent to the previous one, reducing damage from repetitive pulses striking the same area. The slit scanned the cornea many times and the summation of these individual ablations produced the smooth myopic ablation profile, as shown by computerized keratographs and light and electron microscopy.
我们在人类供体眼和切除的角膜盘上进行了用于治疗近视的氟化氩准分子激光（193纳米）表层角膜切除术。激光束通过旋转狭缝塑形，以产生直径7.5毫米的圆形消融区，其具有数学定义的轮廓以矫正近视。角膜表面的能量密度为200毫焦/平方厘米；激光以20赫兹的频率发射。每个4.5毫焦的激光脉冲在角膜上蚀刻出0.17微米深的狭缝图像。由于狭缝移动（0.03赫兹），每个连续脉冲蚀刻的区域与前一个相邻，减少了重复脉冲撞击同一区域造成的损伤。狭缝多次扫描角膜，这些单独消融的总和产生了平滑的近视消融轮廓，计算机角膜地形图以及光学和电子显微镜显示了这一点。
