Which vitamin is primarily associated with vision?

Vitamin A is primarily associated with vision because it plays a crucial role in the formation of rhodopsin, a light-sensitive pigment found in the retina of the eye. Rhodopsin is essential for low-light (scotopic) vision; it allows the eyes to perceive light and dark and is critical for night vision. Additionally, Vitamin A contributes to the maintenance of the cornea, which is vital for clear vision.

The role of Vitamin A in vision extends beyond just night vision; it also supports overall eye health by protecting the surface of the eye. A deficiency in Vitamin A can lead to various visual impairments, including night blindness and more severe conditions such as xerophthalmia, which can lead to blindness if untreated.

The other vitamins listed do not have the same direct connection to vision as Vitamin A does. Vitamin C is important for the health of blood vessels in the eye but does not play a role in the phototransduction process. Vitamin D is primarily associated with bone health and immune function, while Vitamin E is an antioxidant that helps protect cells from oxidative stress but is not specifically linked to visual processes. Therefore, the primary association of Vitamin A with vision is well-supported by scientific understanding of its biological functions.