Question

Night blindness is caused by the deficiency of which vitamin?

Hint:

This vitamin also keeps skin and the cornea of the eye healthy.

Answer 1

Correct answer: Vitamin A.

Night blindness, also called nyctalopia, happens when the retina cannot adjust properly to low light. Vitamin A is needed to make rhodopsin, the pigment in the rod cells of the retina that lets the eye see in dim light. When vitamin A is low, rhodopsin cannot be regenerated fast enough, so a person struggles to see clearly at dusk or in the dark. Good dietary sources of vitamin A include carrots, spinach, milk, eggs, and liver.