近视眼患者角膜直径和角膜曲率的研究

Research of corneal diameter and corneal curvature in myopia population

目的探讨近视眼患者角膜直径和角膜曲率的正常值及二者之间的关系。方法对220例(440眼)近视眼患者(年龄17～41岁,男118例236眼,女102例204眼)采用美国Lasersight公司的AstraMax角膜地形图进行角膜前表面摄像,测量3次并获取角膜水平直径(白到白)和角膜前表面平均曲率的平均值,并对这2项参数进行相关的统计学分析。结果本组中角膜直径平均值为(12.00±0.40)mm,男性为(12.12±0.36)mm,女性为(11.86±0.40)mm。角膜曲率平均值为(43.51±1.37)D,男性为(43.10±1.29)D,女性为(43.99±1.31)D。角膜直径和角膜曲率的回归方程为Y=19.060-0.162X(Y代表角膜直径,X代表角膜曲率)。结论男女之间角膜直径存在着统计学差别,男性大于女性;角膜曲率之间亦有统计学意义,女性大于男性。近视眼患者角膜直径和角膜曲率之间存在统计学负相关性,即角膜曲率越高,角膜直径越小。

Objective To determine the normal value of corneal diameter and corneal curvature in myopia population and its relationship. Methods Corneal diameter and corneal curvature were measured with AstraMax topography system in 220 healthy subjects aged 17 - 41 years old. There were 102 female subjects and 118 male subjects. Each measurement was repeated three times. Results The average corneal diameter was （ 12.00 ± 0.40） rnm, with diameter of （12.12 ± 0.36） mm in male and （ 11.86 ± 0.40） ram in female. The average corneal curvature was （43.51 ± 1.37） D, with curvature of （43.10 ± 1.29） D in males and （43.99± 1.31） D in female.The regression equation between corneal diameter and corneal curvature in myopia population was Y = 19. 060 - 0.162X,where Y represents corneal diameter and X represents corneal curvature. Conclusion There are statistically significant differences between male and female in corneal diameter and corneal curvature. In case of corneal diameter, it is bigger in male than in female. As for the corneal currature, it is higher in female than in male. The corneal diameter is negatively correlated with the corneal curvature. Corneal diameters is decreased with corneal curvature. The higher of the corneal curvature, the less of the corneal diameter.