What are the main harms caused by vitamin A deficiency? How does this vitamin act in the physiology of vision?
Deficiency of vitamin A (retinol) might be cause night blindness, corneal dryness (xerophthalmia) and predisposition to skin injuries.
In the physiology of image, vitamin A participates in the formation of rhodopsin, a pigment responsible for the visual perception in less illuminated places.
Nutrition Vitamins - Image Diversity: vitamin A deficiency