What deficiency in the diet can lead to NIGHT BLINDNESS, where a person cannot see well in dim light?

Vitamin A is required to make rhodopsin, the light-sensitive pigment in the retina's rod cells. Rods are responsible for vision in dim light. A deficiency of vitamin A reduces rhodopsin, so rod function is impaired and the person struggles to see in low light — night blindness. Severe deficiency can progress to total blindness (xerophthalmia). Carrots, green leafy vegetables, and dairy are good vitamin A sources.