Schwiegerling J, Snyder R W
Optical Sciences Center, University of Arizona, Tucson 85721, USA.
J Opt Soc Am A Opt Image Sci Vis. 1998 Sep;15(9):2572-9. doi: 10.1364/josaa.15.002572.
Photorefractive keratectomy is an evolving refractive procedure for correcting myopia, hyperopia, and astigmatism. Earlier descriptions of the patterns required for this surgery are based on paraxial optics. In this investigation the required pattern is generalized to account for spherical refractive error (defocus), axial astigmatism of arbitrary orientation, and fourth-order aberrations of the eye. The patterns described in this study can be used to customize photorefractive keratectomy and to provide corrections that account for aberration content as well as paraxial values. Furthermore, a description of the pattern along the boundary of the optical zone is given, which may prove useful in designing blending zones. An example of the use of these techniques is given for a schematic eye model.
准分子激光角膜切削术是一种不断发展的屈光手术，用于矫正近视、远视和散光。早期对该手术所需模式的描述基于傍轴光学原理。在本研究中，所需模式被推广到可考虑球性屈光不正（离焦）、任意方向的轴向散光以及眼睛的四阶像差。本研究中描述的模式可用于定制准分子激光角膜切削术，并提供既能考虑像差成分又能考虑傍轴值的矫正。此外，还给出了沿光学区边界的模式描述，这在设计融合区时可能会很有用。针对一个示意眼模型给出了这些技术的使用示例。
