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四岁裸眼视力多少正常
更新时间: 2020-11-05 00:00:00  

四岁的孩子正常的视力范围为0.6~0.8,即视力不低于4.8属于正常视力范围。

视力分中心视力和周边视力。中心视力是反映视网膜黄斑部中心凹部功能,是人眼识别外界物体形态、大小的能力.周边视力也叫周边视野。通常所说的视力是指远视力并且是中心视力、静视力,它反映的是视网膜最敏感的部位--黄斑区的功能,远视力检查通常用视力表来进行。

关键词: 视力 多少 正常

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