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6岁的孩子视力正常是多少
更新时间: 2020-11-04 00:00:00  

在0.8-1.0之间。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。保护视力的做法是闭着眼睛,用食指、中指和无名指的指端轻轻地按压眼球,也可以旋转轻揉;不可持续太久或用力揉压,20秒钟左右就停止。

关键词: 孩子 视力 正常 多少

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