成年近视眼角膜Q值与角膜曲率的关系分析

Relation of the Q value and curvature radius of cornea in adults with myopia

目的:研究角膜的非球面参数Q值与角膜曲率的关系。方法:对2008年11月至2009年5月在我院接受准分子激光治疗的患者,术前使用Astramax眼前节测量与分析系统检测302例近视眼,按男女分两组,获取角膜表面Q值与角膜曲率,并做统计学处理。结果:302例596只近视眼角膜Q值呈正态分布,平均值-0.30±0.25(-0.89～-0.04)。角膜Q值男性组-0.30±0.24与女性-0.29±0.27两者间比较差异无统计学意义(P>0.697)。Q值与角膜曲率呈负线性相关关系。结论:角膜非球面参数Q值个体间差异较大,与角膜曲率呈负相关性,与性别无关。

Objective：To investigate the distribution characters and related factors of corneal asphericity（Q-value） in myopia.Methods：According to the patients of intending to accept excimer laser refractive surgery in our hospital from November 2008 to May 2009,subjects were divided into male and female group.Corneal curvature radius and shape factor were examined on 302 myopic patients（596 eyes） by Astramax to polymer,the Q-value was calculated.Statistical analysis was used to comprehend the distribution characters of Q-value.Results：The Q-value of 596 eyes（302 cases） were positive normal distribution with average-0.30±0.25（-0.89～-0.04）.The Q-value between male-0.30±0.24 and female-0.29±0.27 was not statistical difference（P0.697）.The Q-value was negatively related with corneal curvature radius.Conclusion：The corneal Q-value shows a significant individual variation,and is independent from sexual distinction,but related with corneal curvature radius of eye.