摘要
为了建立准分子激光屈光矫正计算模型来引导准分子激光屈光手术,根据角膜非球面的生理特征,将手术前角膜表面假设成在2个主径线上具有不同曲率半径的复曲面,在理论上建立屈光不正和角膜切削量的关系,按照规则散光的5种不同分类(研究复性近视散光、复性远视散光、单纯近视散光、单纯远视散光、混合散光的准分子激光切削数学模型)来计算准分子激光矫正屈光不正时角膜的切削量,达到矫正人眼规则散光的目的,经临床应用取得了良好效果.
The purpose of this research is to establish a mathematical model to determine corneal shape and apply that technique to excimer laser refractive surgery. Seeing that the corneal physiological surface is aspheric, the preoperative corneal shape can be approximated by toric surface with radii of curvature Rix, Riy. The relationship between refraction error and corneal ablation depth was deduced in theory. Various mathematical models which can be used for compound myopia astigmatism, compound hypermetropia astigmatism, simple myopia astigmatism, simple hypermetropia astigmatism, mixed astigmatism have been proposed. Clinic practice shows that the technique proposed can correct regular astigmatism and achieve satisfied results.
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2006年第4期531-536,共6页
Journal of Southeast University：Natural Science Edition
基金
江苏省"六大人才高峰"资助项目
江苏省科技成果转化专项资金资助项目(BA2005025)
关键词
数学模型
角膜
复曲面
屈光不正
准分子激光
角膜屈光手术
规则散光
mathematical model
corneal
toric surface
refractive error
excimer laser
refractive surgery
regular astigmatism
