波前优化和波前引导准分子激光角膜切削对比

Contrast to wavefront optimized and wavefront guided excimer laser photorefractive keratectomy

传统的准分子激光角膜切削术经过多年临床实践证实能获得较好的视力，然而传统疗法行角膜球面切削会将一般的扁平角膜变成更扁圆的轮廓，并导致球面像差。角膜非球面性的改变引起球面像差的增加，并影响夜视力和对比敏感度等视觉质量。波前优化旨在用基于总体均数的调整措施保留眼球先前的视觉像差，并优化角膜的非球面性，从而建立一个基于理想模型的个体化调整措施。波前引导测量眼球像差并行个体化切削治疗可达到更好的视觉效果。就波前优化和波前引导疗法对于球面像差的矫正效果进行综述。

Conventional exeimer laser keratectomy have been proved to achieve better visual function, but the traditional therapy of corneal spherical cutting line generally flat profile will make the cornea more oblate shape and the contours of the cornea and lead to spherical aberration. The alteration of non-spherical nature cause the increase of corneal spherical aberration, which further affects the night vision and contrast sensitivity and other visual quality. Wavefront optimization based on total number of adjustments are to retain the previous visual aberrations of eyes and optimize the non-spherical nature of cornea to create a ideal model based on individual adjustments. Ocular wavefront-guided measurement and ablation in excimer laser keratectomy can achieve better visual outcome. In this paper, wavefront guided and wavefront optimized treatment outcome for the spherical aberration correction are reviewed.