Which vitamin is known for promoting healthy vision?

Vitamin A is essential for maintaining healthy vision because it plays a critical role in the formation of visual pigments in the retina, particularly rhodopsin, which allows the eyes to adjust to low light conditions. This vitamin helps in the conversion of light into electrical signals, which are then sent to the brain, enabling the perception of images. A deficiency in vitamin A can lead to various vision problems, including night blindness and more severe conditions that can affect overall eye health.

While vitamins C, D, and K have their own important roles in the body—such as supporting immune function, aiding in calcium absorption, and promoting blood clotting—none are as directly linked to vision health as vitamin A.