HUMAN NUTRITION

Detailed explanation-1: -Night blindness is one of the first signs of vitamin A deficiency. In its more severe forms, vitamin A deficiency contributes to blindness by making the cornea very dry, thus damaging the retina and cornea.

Detailed explanation-2: -Causes of vitamin A deficiency cause night blindness In the dark, vitamin A (cis-retinal) combines with opsin (a protein that makes up the retinal pigment rhodopsin) to make the pigment in the retina sensitive to low-intensity light, helping the eyes to see in low light. low light conditions.

Detailed explanation-3: -Vitamin A plays an important role in your vision. To see the full spectrum of light, your eye needs to produce certain pigments for your retina to work properly. Vitamin A deficiency stops the production of these pigments, leading to night blindness.

Detailed explanation-4: -Some of the first signs of vitamin A deficiency are dry eyes and night blindness.