角膜中央到周边曲率与等效球镜度的回归系数逐渐增加。
The regression coefficient between corneal power and the refractive error increased from apex to peripheral area.
屈光状态，即球镜度数、柱镜度数、等效球镜三组差异无统计学意义；
No statistic difference was found in refractive status, i. e. spherical, cylindrical and spherical equivalent degree among three groups;
屈光状态，即球镜度数、柱镜度数、等效球镜三组差异无统计学意义；
No statistic difference was found in refractive status, i. e. spherical, cylindrical and spherical equivalent degree among three groups;
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