基于椭圆抛物面的近视散光矫正模型的研究  

Research on the profile to correct astigmatic myopia based on the asymmetric parabolic corneal surface

作　　者：叶寒[1] 饶锡新[1] 涂海宁[1] 沈建新[2] 

机构地区：[1]南昌大学机电工程学院,南昌330029 [2]南京航空航天大学,南京210016

出　　处：《激光杂志》2007年第1期72-73,共2页Laser Journal

基　　金：江苏省高新技术研究计划(BG2002012);"十五"国家计委产业化项目(计产业:〔2002〕1329号)资助。

摘　　要：针对人眼角膜地形的多样性,本文采用了椭圆抛物面对近视散光角膜表面建模,以此建立了近视散光矫正的模型,定量地分析了近视散光度数以及术区直径和最大切削深度的关系,对本文的模型与圆环面假设的近视矫正模型比较发现,在相同的近视散光度数度和术区情况下,本模型所需要的矫正量更小,适用于切削量大的高度近视散光的矫正。将该模型应用于小光斑准分子激光眼科治疗机,经过PMMA试验验证,本文给出的治疗模型能有效地矫正近视散光。Based on the asymmetric parabolic corneal surface, a model to calculate the profile to correct astigmatic myopia is presented. The influence of surgery zone size on maximal ablation depth is discussed in detail, Compared with the model based on the torte corneal surface, at the eonditions of the ablation zone and refractive error, the maximal ablation depth calculsted by the model presented in the paper required to correct astigmatic myopia is less, It approved the model presented in this paper is effective to correct astigmatic myopia by PMMA experiment.

关 键 词：准分子激光 近视散光 椭圆抛物面 飞点扫描 

分 类 号：R779.63[医药卫生—眼科]