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散光值多少为正常范围

更新时间: 2020-11-04 00:00:00     

散光的正常值是0-75度。散光(astigmatism)是眼睛的一种屈光不正常表现,与角膜的弧度有关。平行光线进入眼内后,由于眼球在不同子午线上屈光力不等,不能聚集于一点(焦点),也就不能形成清晰的物像,这种情况称为散光。

关键词: 散光 多少 正常 范围

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