Night blindness is caused by the deficiency of Vitamin A. Vitamin A is essential for the formation of rhodopsin, a pigment found in the rod cells of the retina that is crucial for vision in low light conditions. A deficiency leads to impaired night vision (nyctalopia). Vitamin C deficiency causes Scurvy. Vitamin K deficiency can lead to blood clotting disorders. Deficiencies of various Vitamin B types cause conditions like Beriberi (B1), Pellagra (B3), anemia, etc.