Methods: Analysis was done with mydriatic and computer optometry to measure corneal curvature and determine the length of the optic axis.
方法：对近视学生采用散瞳验光和电脑验光及测定患者的角膜曲率和用a超测定眼轴长度而进行分析。
Main Outcome Measure Diopter of myopia, cornea curvature, axis length of eye and central cornea thickness.
主要指标近视度数、角膜曲率、眼轴长度及角膜中央厚度。
Centrifugal force: the component of apparent force on a body in curvilinear motion as observed from that body that is directed away from the center of curvature or axis of rotation.
离心力：在曲线运动中可明显由物体上观察到的力的组成部分，这种力使物体具有远离曲线中心或旋转轴心的趋向。
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