调整非球面因子的远视矫正机理  

Model to calculate the ablation profile to correct hyperopia based on the aspherical corneal surface

作　　者：叶寒[1] 曹正林[2] 杨湘杰[1] 叶艳琴[1] 易光斌[1] 

机构地区：[1]南昌大学机电工程学院,南昌330029 [2]南京邮电大学通信与信息工程学院,南京210003

出　　处：《激光杂志》2009年第5期80-82,共3页Laser Journal

基　　金："十五"国家计委产业化项目(计产业〔2002〕1329号);江苏省科技成果转化项目(BA2005025)

摘　　要：研究了调整非球面因子来矫正远视的机理,假设术前术后角膜曲面为二次曲面,以此推导出远视矫正量公式,给出了一种过渡区域确定切削量的方法,并确定了各公式中的参数。本模型保证了正常角膜的非球性,理论上可减少术后球差,改善术后视觉质量,本模型可用于指导单纯远视的矫正。To address the issue of human corneal modeling while accounting for spherical aberrations. The corneal surface was modeled for hyperopia before and after surgery, as aspheric conicoid surfaces, a model to calculate the profile to correct simple hyperopia was developed. The Q parameter and ablation zone size were discussed in detail. Compared with the model based on the sphere corneal surface, at the conditions of the same ablation zone and refractive error, the maximal ablation depth calculated by the model presented in the paper requiredto correct simple myopia is more. The model can be applied for simple hyperopia.

关 键 词：准分子激光 远视矫正 非球面 飞点扫描 

分 类 号：R779.63[医药卫生—眼科]