Discussion
The ocular lesions are caused by the deficiency of which of the following vitamins?
Answer: A
Ocular lesions are caused by deficiency of vitamin A.
Vitamin A is needed to make rhodopsin, the light-sensitive pigment of the retina, and to keep the conjunctiva and cornea healthy. Its deficiency causes xerophthalmia: night blindness, dryness of the conjunctiva, Bitot's spots, and in severe cases softening of the cornea (keratomalacia) and blindness.
Vitamin K deficiency causes bleeding disorders, vitamin D deficiency causes rickets and osteomalacia, and vitamin C deficiency causes scurvy. None of these is the classic cause of eye lesions.
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