不同类型白内障的高阶像差  

Higher-order aberrations of different types of lenticular opacities

作　　者：钱益勇[1] 吴文捷[1] 李秀梅[1] 王明旭 张振平[1] 

机构地区：[1]中山大学中山眼科中心,眼科学国家重点实验室,广州510060 [2]Wang Vision Institute, 1801 West End Ave, Nashville, TN 37203 USA

出　　处：《中国实用眼科杂志》2007年第6期611-615,共5页Chinese Journal of Practical Ophthalmology

基　　金：广东省科技计划项目（2005830901006）

摘　　要：目的 比较白内障和透明晶状体的高阶像差并分析不同类型白内障的高阶像差特点。方法 使用Tracey像差仪分别测量3．0mm和5．0mm瞳孔直径下皮质性白内障（36例40眼）、核性白内障（25例27眼）以及后囊下性白内障（26例26眼）的高阶像差，28例透明晶状体眼（28眼）作为对照组，使用两个独立样本的t检验进行统计分析。结果 3．0mm瞳孔直径下，皮质胜白内障（0．148±0．086）μm、核性白内障（0．137±0．064）μm以及后囊下性白内障（0．209±0．181）μm的总高阶像差均高于对照组（0．069±0．028）μm，差异均具有统计学意义；其中，三叶草是最主要的像差成分。5．0mm瞳孔直径下，皮质性自内障（0．439±0．161）μm、核性自内障（0．443±0．14）μm以及后囊下性白内障（0．590±0．204）μm的总高阶像差均高于对照组（0．253±0．097）μm，差异均具有统计学意义；其中，三种白内障类型中最主要的高阶像差分别为彗差（0．243±0．135）μm、球差（0．231±0．122）μm以及三叶草（0．343±0．191）μm。结论与正常透明晶状体对比，自内障的高阶像差明显增加，不同类型的白内障具有不同的高阶像差特点。Objective To compare the higher-order aberrations between normal and cataractous lens and evaluate the characteristics of higher-order aberrations in three types of lenticular opacities. Methods The higher-order aberrations of cortical cataract （40 eyes of 36 patients）, nuclear cataract （27 eyes of 25 patients）, subcapsular cataract （26 eyes of 26 patients） and 28 eyes of 28 normal subjects were measured under both 3.0 mm pupil size and 5.0mm pupil size using a ray tracing aberrometry （Tracey wavefront aberrometer）. The Two Independent Samples t test was used to analyze the differences. Results For a 3.0mm pupil size, the root mean square （RMS） of total higher-order aberrations in cortical cataract （0.148± 0.086μm）, nuclear cataract （0.137± 0.064μm） and subcapsular cataract （0.209± 0.181μm） were statistically significantly higher than those of the control group （0.069± 0.028μm）, and Trefoil was the most predominant higher-order aberration. For a 5.0 mm pupil size, the RMS of total higher-order aberrations in cortical cataract （0.439 ± 0.161μm）, nuclear cataract （0.443 ± 0.144μm） and subcapsular cataract （0.590 ± 0.204μm） were statistically significantly higher than those of the control group （0.253 ±0.097μm）. The most predominant higher-order aberration of three types of lenficular opacities were coma （0.243. ± 0.135μm）, spherical aberration （0.231 ± 0.122μm） and trefoil （0.343 ± 0.191μm）, respectively. Conclusions The higher-order aberrations of cataractous lens increased compared with normal lens. The most predominant higher-order aberration was different in three types of lenticular opacities.

关 键 词：白内障 高阶像差 

分 类 号：R776.105[医药卫生—眼科]