Why is the ability of the eye to detect light decreased when there is a vitamin A deficiency?
a) Vitamin A deficiency leads to an increase in the production of visual pigments.
b) Vitamin A deficiency impairs the synthesis of rhodopsin, a visual pigment.
c) Vitamin A deficiency enhances the sensitivity of the retina to light.
d) Vitamin A deficiency increases the transmission of visual signals to the brain.