Which vitamin is crucial for vision?

Vitamin A is essential for vision due to its role in the formation of rhodopsin, a protein in the retinal cells of the eye that is vital for low-light and color vision. It helps maintain the health of the cornea and aids in the overall function of the retina. Deficiency in vitamin A can lead to night blindness and other visual impairments, emphasizing its crucial role in maintaining vision.

While other vitamins have important health benefits, they do not have the same specific connection to vision as vitamin A. For instance, vitamin B12 is essential for nerve function and blood cell formation, vitamin D plays a significant role in bone health and immune function, and vitamin C is vital for skin health and antioxidant protection. However, none of these vitamins directly contribute to the physiological processes involved in sight the way vitamin A does.