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瞳孔散大多少为正常

更新时间: 2020-11-05 00:00:00     

一般正常的瞳孔是2.5mm到4mm,最大是8mm,如果大于5mm的时候就是瞳孔散大了。

瞳孔,是动物或人眼睛内虹膜中心的小圆孔,为光线进入眼睛的通道。虹膜上瞳孔括约肌的收缩可以使瞳孔缩小,瞳孔开大肌的收缩使瞳孔散大,瞳孔的开大与缩小控制进入瞳孔的光量。

关键词: 瞳孔 多少 正常

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