| Michael R |
Carrot, spinach and sweet potatoes have the highest potential of beta carotene. They provide required vitamin A nutrition to the retina of our eyes which regulates the light to prevent any damage to the vision. You should know that these vegetables as such are not responsible to provide the carotenoid but the red or yellow colour pigment that is deposited in them provide the benefit. As you know the pigments are the best substance to protect our body from sun rays including our eyes.