We've all heard the saying, "An apple a day will keep the Doctor Away." Will eating carrots have the same effect? Before you rush off to buy your carrots in bulk, here are a few things to consider. Vitamin A has been proven to contribute to eye health. The cornea can disappear if the body does not have enough Vitamin A, and Vitamin A can help people to see under low light conditions. So what are the best sources of Vitamin A? Carrots indeed are a good source of Vitamin A.