Vitamin A is not only good for the functioning of the ocular surface it is also needed for the development of the photoreceptor rhodopsin. The pigment is useful in permitting our eyes to see around evening time. Hence, the main cause of night blindness is vitamin A deficiency. Eggs, Cod liver oil, Fish, Carrots, Skim Milk, Broccoli, Spinach and other leafy veggies are good source of Vitamin A.