摘要
目的明确近视人群中角膜非球面度(Q 值)的平均值及分布范围,研究相关因素对 Q 值的影响。方法收集564例(564眼)近视患者的病史并进行常规眼科检查,检测其角膜厚度、眼轴长度、角膜非球面度(Q 值)、角膜不规则指数(corneal irregularity measurement,CIM)、角膜地形图散光值和平均角膜屈光度;分析年龄、性别、等效球镜、软性角膜接触镜配戴时间、角膜厚度、角膜散光、平均角膜屈光度、CIM 值等对 Q 值的影响。结果 Q 值分布范围-0.02～-0.72,平均-0.29±0.11,低、中、高度近视 Q 值分别为-0.25±0.11,-0.27±0.11,-0.32±0.11。CIM 值与 Q 值绝对值之间呈正相关,平均角膜屈光度与 Q 值绝对值呈负相关;有、无软性角膜接触镜配戴史组的 Q 值间差异无统计学意义(P>0.05)。结论近视人群的角膜非球面度平均值为-0.29,低、中、高度近视眼角膜非球面度存在差异;CIM 值、平均角膜屈光度与角膜非球面度有相关性;软性角膜接触镜配戴、年龄、性别对非球面度无影响。(中国眼耳鼻喉科杂志,2007,7:292-294)
Purpose To study the mean value, the range of corneal asphericity（Q） in myopic eyes and the related influencing factors. Methods Five hundred and sixty-four eyes of 564 patients with myopia were enrolled in this study with one eye of each patient selected randomly. History and regular ophthalmological examination was taken for each patient, including corneal thickness, ocular axis, corneal asphericity （ Q）, corneal irregularity measurement （ CIM ）, corneal astigmatism and mean corneal refractive power. The influence of age, sex, spherical equivalent （SE）, the history of soft contact lens, corneal thickness, corneal astigmatism, mean corneal refractive power and CIM on Q value was ana- lyzed. Results The Q value of myopic eyes ranged from - 0. 02 to - 0. 72 with the mean value - 0. 29 ± 0. 11. The Q value of low, moderate and high myopia were -0.25 ±0. 11, -0.27 ±0.11 and -0.32 ±0.11 respectively. CIM was positively correlated with Q, while mean corneal refractive power was negatively correlated with Q. There was no significant difference of Q value between groups with and without soft contact lens history（P 〉 0. 05 ）. Conclusions The mean Q value in myopic eye is - 0. 29 ; the Q values of low, moderate and high myopia are differrent. CIM and mean corneal refractive power are correlated with Q. Soft contact lens, age and sex has no influence on Q. （ Chin J Ophthalmol and Otorhinolaryngol, 2007,7 ： 292 -294 ）
出处
《中国眼耳鼻喉科杂志》
2007年第5期292-294,共3页
Chinese Journal of Ophthalmology and Otorhinolaryngology
