摘要
目的研究中国人低中度近视眼角膜Q值及其分布特点。方法采用Allegretto wave topolyzer角膜地形图仪检测122例(244眼)低中度近视眼角膜地形图,根据Lens fittin显示的不同直径范围内的角膜平均偏心率(ε)计算平均Q值(Q=-ε2),并作统计学分析。结果122例低中度近视眼角膜平均Q值(30°、20°、10°)分别为:右眼-0.30±0.15,左眼为-0.31±0.14;-0.18±0.17,-0.18±0.16;-0.11±0.15,-0.11±0.15左右眼Q值差异均无显著性(P>0.05),Q值与K值及屈光度无显著相关性(P>0.05)。结论低中度近视眼角膜由周边区至中央区Q值增大,即角膜前表面形态为非球面,周边平坦而中央近似球面。
Objective To study corneal asphericity （Q-value） in Chinese people with mild and medium myopia. Methods One hundred twenty-two people （244 eyes） with mild and medium myopia were examined with an Allegretto Wave Topolyzer, and Q-values were calculated （Q=-ε^2）. Statistical analysis （t-test） was performed. Results The average Q-values of the corneas of Chinese people with mild and medium myopia were Q30=-0.30± 0.15 in the right eye and Q30=-0.31±0.14 in the left eye; Q20= -0.18±0.17 in the fight eye, Q20=-0.18±0.16 in left eye; Q10= -0.11±0.15 in right eye, Q10=-0.11±0.15 in left eye. The difference in the Q-value between the right and left eyes was not significant （P〉0.05）. Conclusion The cornea of Chinese people with mild and medium myopia was found to have a prolate spheroid shape.
出处
《眼视光学杂志》
2008年第1期72-73,共2页
Chinese Journal of Optometry & Ophthalmology
关键词
角膜
Q值
近视
cornea
Q-value
myopia
作者简介
沈政伟，男，42岁。E—mail：zhwshen@21cn．com
