瞳孔自然散大下近视眼高阶像差的临床分析  

Observation on higher order aberrations of myopia in scotopic environment

作　　者：张春元[1] 唐志刚[1] 

机构地区：[1]苏州市立医院北区眼科,江苏苏州215008

出　　处：《海南医学院学报》2012年第10期1394-1396,共3页Journal of Hainan Medical University

基　　金：海南医学院科研基金资助学报项目(112210340)~~

摘　　要：目的:探讨在瞳孔自然散大状态下近视眼高阶像差的分布以及屈光度、年龄等对高阶像差的影响。方法:采用美国VISX公司WaveScan波前像差仪对LASIK术前的140例(280眼)进行检查,在暗室内瞳孔自然散大6mm时的高阶像差RMS值(均方根)及Zernike系数,根据年龄、屈光度进行分组比较研究。结果:在暗室瞳孔自然散大的状态下,总高阶像差RMS均值为(0.251±0.089)μm,从三阶像差到六阶像差RMS值呈递减趋势,三阶彗差、三级散光及四阶球差的RMS值最为显著。高阶像差随近视程度的加深而增加,总高阶像差RMS值(RMSh)、三阶到六阶各阶的RMS值、三阶彗差的RMS值、三级散光RMS值、四阶球差RMS值与近视程度有显著差异(P<0.05)。三阶彗差与三级散光RMS值随年龄增长而增加。结论:高阶像差的个体差异较大,其中RMS值从三阶到六阶呈递减趋势,以三阶彗差、三级散光、四阶球差的RMS值最显著,高阶像差随近视程度的增加而增大,三阶彗差、三级散光RMS值随年龄增长而增大。Objective： To explore the distribution of ocular high-order aberrations of myopic eyes in scotopic environment, and to indentify the influences of age on the aberrations. Methods：In a seotopie en- vironment, WaveScan （visx. inc. ） were applied to examine 140 patients （280 myopic eyes） before they un- dergoing LASIK surgery, root-mean-square （RMS） values and Zernike coefficients were analyzed when pupil size were dilated to be 6.0 mm. The patients were divided into different groups according to refrac- tive power and age. Results： In a scotopic environment, mean RMS value was （0. 251＋0. 089） /,m show- ing a decreasing tendency from 3rd to 6th order aberrations. Among the aberrations,3rd-order coma, tre- foil and 4th-order spherical aberration were the most significant ones. High order aberrations increased with the refractive power. Significant differences were found among myopia, total ocular high order RMS and coma （P all d0.05）. RMS of 3rd coma and trefoil increased with age. Conclusions： High-order aber- rations varied widely among individuals. The RMS values decreased from 3rd to 6th order. Among the ab- errations, the most significant ones were 3rd coma, trefiol and 4th spherical aberration. High-order aber- rations increased with refractive power, while 3rd coma and trefoil increased with age.

关 键 词：近视 高阶像差 球差 彗差 

分 类 号：R778.11[医药卫生—眼科]