Which vitamin is fat-soluble and crucial for vision health?

Vitamin A is a fat-soluble vitamin that plays a critical role in maintaining vision health. It is essential for the formation of rhodopsin, a pigment found in the retina that is necessary for low-light and color vision. This vitamin also supports the structure and function of the cells in the eye, contributing to overall eye health and the prevention of conditions such as night blindness.

Unlike the other options listed, which are either water-soluble or serve different primary functions, Vitamin A is particularly recognized for its impact on vision. Vitamin C, for instance, is primarily known for its antioxidant properties and its role in immune function, while Vitamin B12 is crucial for nerve function and the production of red blood cells. Vitamin D primarily supports bone health and calcium metabolism. Hence, Vitamin A stands out for its unique and essential contribution to vision, making it the correct choice in this context.