Which Vitamin deficiency is associated with night blindness?

Night blindness is primarily associated with a deficiency in Vitamin A. This vitamin plays a crucial role in the formation of rhodopsin, a pigment found in the retina that is essential for vision in low-light conditions. When there is insufficient Vitamin A in the body, the production of rhodopsin is impaired, leading to difficulties in seeing at night or in dimly lit environments.

Vitamin A is also important for the maintenance of healthy epithelial tissues, including those in the eyes, and a deficiency can result in a range of ocular issues, including xerophthalmia, which can progress to more severe vision problems if not addressed.

Though Vitamin C, D, and K have their own vital roles in the body—such as collagen formation, calcium metabolism, and blood clotting, respectively—they are not directly linked to the condition of night blindness. Therefore, the association of night blindness with Vitamin A deficiency is well established in nutritional science.