近视人群角膜前表面Q值及其与球差的相关性  

Q-value of corneal anterior surface and its correlation with spherical aberration in myopia population

作　　者：胡正再[1] 欧阳红专[1] 王勤美[2] 陈世豪[2] 

机构地区：[1]株洲三三一爱尔眼科医院,中国湖南省株洲市412002 [2]温州医学院附属眼视光医院,中国浙江省温州市325027

出　　处：《国际眼科杂志》2010年第9期1680-1682,共3页International Eye Science

摘　　要：目的:研究近视人群角膜前表面Q值的分布及Q值与角膜前表面球差(C12)、全眼球差(C12)之间的相关性。方法:选择青少年近视眼100眼。使用TOPOLYSER角膜地形图测量角膜前表面的e值,根据Q=-e2,分别求得角膜20°,25°,30°的Q值。WASCA波前像差分析仪和Humphrey角膜地形图仪分别测量并获得全眼球差(6.0mm分析直径)和角膜前表面球差(6.0mm分析直径)的Zernike系数进行分析。结果:20°,25°,30°的Q值分别为-0.144(中位数),-0.213±0.110,-0.277±0.108。6.0mm分析直径下角膜球差和全眼球差分别为0.25712±0.06914μm和0.06630±0.10823μm。25°的角膜Q值与6.0mm角膜球差呈正相关(r=0.673,P=0.000)。25°的角膜Q值与6.0mm全眼球差正相关(r=0.241,P=0.016)。结论:角膜前表面从中央向周边变平坦趋势越来越明显,Q值绝对值越往周边越大。25°角膜前表面Q值与角膜球差显著相关,而与全眼球差相关性弱。AIM： To study the distribution of Q-values on corneal anterior surface and analyze its correlation with corneal spherical aberration （C12） and total spherical aberration （C12） respectively. METHODS： One hundred myopia eyes were evaluated with TOPOLYSER, Humphrey and WASCA, and the eccentricities （e-value） of corneal surface （20°, 25° and 30°）, CTS data and total spherical aberration （diameter=6.0mm） were recorded respectively. The e-values were analyzed using formula （Q=-e2） to obtain Q-value. CTS data were analyzed using Matlab software to obtain the spherical aberration of cornea （diameter=6.0mm）. RESULTS： The Q-values of corneal anterior surface （20°, 25° and 30°） were -0.144（M）, -0.213±0.110 and -0.277±0.108, respectively. The corneal and total spherical aberrations （diameter=6.0mm） were 0.25712±006914μm and 0.06630±0.10823μm, respectively. Q-value of 25° had high correlation （r=0.673, P=0.000） with corneal spherical aberration, but low correlation （r=0241, P=0016） with total spherical aberration. CONCLUSION： Firstly, corneal surface is much flatter from center to periphery and the absolute values of Q become much larger. Secondly, the Q-value of 25° has high correlation with corneal spherical aberration but low correlation with total spherical aberration.

关 键 词：近视 角膜 Q值 球差 

分 类 号：R778[医药卫生—眼科]