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三岁孩子正常视力是多少
更新时间: 2020-11-05 00:00:00  

三岁孩子的正常视力应该是0.7到0.8(也就是4.8到4.9),新生儿的眼球外观几乎是正圆形的,眼球晶状体和睫状肌的调节能力较差,平行光线通过屈光系统后成像落在视网膜之后,好表现为远视眼。

关键词: 孩子 正常 视力 多少

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