Deficiency in which vitamin can result in vision problems?

A deficiency in vitamin A can lead to significant vision problems, making this the correct answer. Vitamin A is essential for the maintenance of healthy vision because it plays a crucial role in the formation of rhodopsin, a protein in the retina that allows for vision in low-light conditions. An inadequate intake of vitamin A can result in night blindness and, in severe cases, permanent damage to the cornea, known as xerophthalmia. This vitamin's importance in visual health is well-documented, which highlights its specific relationship to vision.

While vitamin C and vitamin K are important for overall health and play roles in processes such as collagen formation and blood clotting, respectively, they do not have a direct connection to vision issues like vitamin A does. Additionally, the option stating "All of the Above" does not apply here, as only vitamin A is primarily associated with vision problems. Thus, the focus on vitamin A emphasizes its specific role in ocular health.