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結膜乾燥

 
,醫學編輯
最近審查:19.11.2021
 
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乾眼症(乾燥性角膜炎,角化軟化症)是由營養缺乏引起的角膜變性。

乾眼症通常由維生素A不足和熱量蛋白質飲食不足引起。它的特點是雲霧乾燥的角膜,發生脫上皮。角膜繼發感染常常會發生潰瘍。淚腺和結膜也受到影響。沒有眼淚會導致眼睛過度乾燥和泡沫狀排出物,出現在顳側並且通常是眼球的鼻結膜(Bitot污漬)。可能會出現夜盲症。

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