This vitamin is a fat soluble antioxidant vitamin present in supplements preformed or as beta-carotene (provitamin A), which the body then coverts to vitamin A.
Vitamin A is essential for normal vision and eye health because it is involved in the perception of light and because it is needed for normal cell differentiation.
Cell differentiation is the process whereby immature cells change in structure and function to become specialized.
Vitamin A help human see because retinal is part of rhodopsin. Rhodopsin is alight sensitive pigment. When light strikes rhodopsin, it initiates a series of events that’s result in a nerve signal being sent to the brain, which allows human to see.
Vitamin A also requires for producing iodopsins, the light sensitive pigments for daylight or color vision.
The first sign of the breakdown of rhodopsin is the loss of night vision. The eye no longer distinguishes colors. Such deficiency calls for vitamin A. The cornea is also damaged when this vitamin is lacking, but the greatest damage is to the retina.
Vitamin A is important for vision and eye health
