Vitamin A deficiency

（重定向自Hypovitaminosis A）

Disability-adjusted life year for vitamin A deficiency per 100,000 inhabitants in 2002.[27]
  no data
  less than 35
  35–70
  70–105
  105–140
  140–175
  175–210
  210–245
  245–280
  280–315
  315–350
  350–400
  more than 400

Vitamin A deficiency (VAD) is a lack of vitamin A in humans. It is common in poorer countries but rarely seen in more developed countries. Nyctalopia (night blindness) is one of the first signs of VAD. Xerophthalmia, keratomalacia, and complete blindness can also occur since Vitamin A has a major role in phototransduction.

单词	Hypovitaminosis A
释义	Hypovitaminosis A 英语例句库 Hypovitaminosis A causes hydrocephalus by altering CSF resorption at the arachnoid granulations. 维他命A不足也会造成蜘蛛膜对脑脊液出现吸收障碍。英语百科 Vitamin A deficiency （重定向自Hypovitaminosis A） Vitamin A deficiency (VAD) is a lack of vitamin A in humans. It is common in poorer countries but rarely seen in more developed countries. Nyctalopia (night blindness) is one of the first signs of VAD. Xerophthalmia, keratomalacia, and complete blindness can also occur since Vitamin A has a major role in phototransduction.
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