近视患者波前像差特征分析

Characterization of wavefront aberration in myopes

目的探讨不同程度近视患者波前像差特征。方法抽取2008-03～07在广西视光中心就诊的105例近视患者,其中男54例,女51例;年龄16～36岁;屈光度-0.50～-10.50DS（等效球镜）。采用美国VISX公司生产的WaveScan波前像差仪对所有患者进行波前像差检测,收集每位患者的波前像差数据。将近视患者按低、中、高度近视分组后,使用SPSS13.0统计软件采用One-wayANOVA单因素方差分析,LSD法比较三组间波前像差的差异。结果低、中、高度近视三组间的总像差两两之间均不相同,差异有统计学意义（F=203.044,P〈0.01）,并且近视程度越高,总像差越大。而总高阶像差、三叶草、彗差、球差等四项数据在三组间的差异均无统计学意义（P〉0.05）。各近视组波前像差成分中,总高阶像差、三叶草、彗差、球差这四项指标的数值在各组中均呈依次降低。结论近视患者的总像差随着近视程度而增大,但高阶像差具有个体差异性。

Objective To investigate the characteristics of wavefront aberration in different myopes. Methods One hundred and five myopic out-patients （male 54, female 51） between March and July 2008 in Guangxi visual science and optometry center, aged from sixteen to thirty six, and refractive power ranged from - 0.50 to - 10.50 diopters（spherical equivalent） were enrolled retrospectively. And the myopes were divided into low, moderate and high groups. WaveScan system（Visx corp. made in USA） was used to capture each myopic wavefront aberration images. Root mean square wavefront error was used as a parameter of myopic optical quality. One-way ANOVA and LSD were made to compare to wavefront aberration differences among the three groups by SPSS 13.0 version software. Results LSD analysis showed that there were significant differences among the three groups in total aberrations （F = 203.044, P 〈 0.01 ）, and the higher of myopia, the larger of total aberrations. But total higher-order aberration, trefoil, coma and spherical aberration didn＇ t show significant difference among the three groups （ P 〉 0.05 ） . And these four indices demonstrated a descending trend orderly in each group. Conclusion Myopic total aberration would be increased with the growth of myopia, but higher-order aberrations just shew individual differences among the myopes in different levels.