In which condition is night blindness commonly noted?

Night blindness, or nyctalopia, is primarily associated with vitamin A deficiency. This condition impairs the ability to see in low-light conditions because vitamin A is essential for the production of rhodopsin, a pigment found in the retina. Rhodopsin enables the eyes to adjust to darkness, and insufficient levels due to vitamin A deficiency inhibit this process.

While other vitamin deficiencies, such as those caused by B12, niacin, and folic acid, can lead to other ocular issues or overall health problems, they do not specifically impact night vision in the same manner as vitamin A deficiency. Therefore, individuals deficient in vitamin A commonly exhibit night blindness as a significant symptom, linking the deficiency directly to impaired night vision.