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8岁小孩正常的视力是多少算正常

更新时间: 2020-11-05 00:00:00     

八岁儿童正常视力在4.9以上属于正常,让孩子注意用眼卫生,学习当中长期避免用眼过度。

视力是指视网膜分辨影像的能力。视力的好坏由视网膜分辨影像能力的大小来判定,然而当眼的屈光介质变得混浊或存在屈光不正(包括近视、远视、散光等)时,即使视网膜功能良好的眼视力仍会下降。

关键词: 小孩 正常 视力 多少

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