结果：近视眼按病变性质分类，以单纯性近视占绝大多数；
Results:By the classification of the causes of myopia, the simple myopia constitutes the majority.
结果：按病变性质分类，以单纯性近视占绝大多数（803例）；
Results: According to the property of myopia, more cases had simple myopia(803 cases);
多元线性回归和相关分析显示眼球轴长增加是单纯性近视眼形成的主要因素。
Multiple linear regression and correlative analysis showed that the increase in optic axis was main factor for the formation of simple myopia of teenager.
目的探讨prk与lasik治疗单纯性近视术后产生散光的原因及变化规律。
Objective To find the causes of astigmatism after simple myopic surgery of PRK and LASIK and its variation.
方法在正常眼前放置正、负球镜，人工诱导单纯性远视、近视性屈光参差。
Methods Hypermetropia and myopia were induced by playing concave and convex lens in front of eyes of 32 subjects.
方法在正常眼前放置正、负球镜，人工诱导单纯性远视、近视性屈光参差。
Methods Hypermetropia and myopia were induced by playing concave and convex lens in front of eyes of 32 subjects.
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