Hanna K D, Chastang J C, Asfar L, Samson J, Pouliquen Y, Waring G O
Department of Ophthalmology, Hotel-Dieu Hospital, Paris, France.
J Cataract Refract Surg. 1989 Jul;15(4):390-6. doi: 10.1016/s0886-3350(89)80056-2.
We describe the structure and function of a delivery system designed for use with an argon fluoride excimer laser for corneal surgery. The basic principle of the delivery system is to shape the laser beam with a slit mask to a defined configuration. The image of the slit is moved across the cornea in a mathematically defined pattern to ablate a given amount of tissue, creating a new anterior radius of curvature for the cornea. The location of the beam on the cornea is determined by a rotating dove prism and a translating spherical lens, each of which is controlled by computer-regulated servomotors. The system is versatile and can be used for laser myopic or hyperopic keratomileusis, for correction of astigmatism by surface ablation, for creation of radial or transverse linear cuts, for excision of corneal buttons, and for uniform lamellar corneal smoothing procedures. The delivery system is currently used in the laboratory for the ablation of nonhuman primate corneas.
我们描述了一种设计用于与氩氟准分子激光配合进行角膜手术的输送系统的结构和功能。该输送系统的基本原理是用狭缝光阑将激光束整形为特定的形状。狭缝的图像以数学定义的模式在角膜上移动，以消融一定量的组织，为角膜创造新的前曲率半径。光束在角膜上的位置由一个旋转的道威棱镜和一个平移球面透镜确定，它们各自由计算机控制的伺服电机控制。该系统用途广泛，可用于激光近视或远视角膜磨镶术、通过表面消融矫正散光、制作径向或横向线性切口、切除角膜纽扣以及进行均匀的板层角膜平滑手术。该输送系统目前在实验室中用于非人类灵长类动物角膜的消融。
