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视力49相当于近视多少度
更新时间: 2020-11-05 00:00:00  

视力4.9相当于近视多少度主要看不同的层次人群,年龄段,比如在7岁以内的小朋友视力4.9,可以认为视力是正常的,成年人裸眼视力是0.9,一般也是没有度数的,或者有50度左右的近视或远视,或者是散光。近视,中医病名,是眼在调节松弛状态下,平行光线经眼的屈光系统的折射后焦点落在视网膜之前。古代医籍对本病早有认识,称为目不能远视,又名能近怯远症,至《目经大成》始称近视。

关键词: 视力 相当 近视 多少

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