Xeropthalmia, a condition of dryness of the eye caused by damage to the eye tissue, is a sign of vitamin A deficiency disorder (VADD). An earlier sign of VADD is

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Night blindness is an earlier sign of VADD than hair loss or anemia. Night blindness is a condition where a person affected by it may find it difficult or impossible to see in dimly lit environments, such as during dusk or dawn. It occurs due to damage to the eye tissue caused by the lack of vitamin A, which is essential for maintaining eye health. If VADD is not treated promptly, it can progress to xeropthalmia, leading to permanent blindness.

Xeropthalmia, a Condition of Dryness of the Eye Caused by Damage