Vitamin A deficiency and associated eye disease.
D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D008875:Middle Aged; D009755:Night Blindness / Q000209:etiology*; D009747:Nutritional Physiological Phenomena; D014801:Vitamin A / Q000627:therapeutic use; D014802:Vitamin A Deficiency / Q000150:complications* / Q000188:drug therapy; D014985:Xerophthalmia / Q000209:etiology*
D014801:Vitamin A