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目的研究角膜曲率与临床屈光变化之关系。方法用美国Ｌｅｉｃａ角膜曲率计对正视眼６２０只，近视眼５８０只进行角膜中央曲率测量。结果角膜中央曲率：正视眼为４３．８９２±１．４２３Ｄ，近视眼为４３．８２７±１．３５９Ｄ（Ｐ＞０．０５）；男性为４３．６３±１．３９５Ｄ，女性４４．１７±１．４４６Ｄ（Ｐ＜０．０１）。散光与角膜垂直及水平曲率相差较大有关。随着年龄增加，角膜中央曲率有增加的趋势。结论近视形成与角膜曲率关系不大，女性角膜曲率较男性大；散光形成与角膜形态不规则有较大关系，中老年屈光远视化主要是晶体屈折力减弱造成而非角膜曲率改变所致。
Objective To study the relationship between corneal curvature and clinical refractive changes. Methods 620 lenticular keratometers were used in the United States. 580 corneal central curvatures were measured in myopia. Results The central corneal curvature was 43.892 ± 1.423D in eyelid eyes and 43.827 ± 1.359D in myopia eyes (43.63 ± 1.395D in male, 44.17 ± 1 in female .446D (P <0.01). Astigmatism and corneal vertical and horizontal curvature of the larger difference between. As the age increases, the central corneal curvature tends to increase. Conclusions There is not much correlation between myopia formation and corneal curvature. The corneal curvature of female is larger than that of male. The formation of astigmatism is related to the irregular corneal shape. The refractive hypermetropia of middle aged and old people is mainly caused by the weakening of the refractive power of the lens rather than the change of the corneal curvature.