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Lutein and zeaxanthin are the only carotenoids found in the retina of the eye. They are found in the macula and absorb blue light which may protect the eye from the blue light entering and causing light-induced oxidative damage. This is thought to be a major key to t macular degeneration. Evidence shows that the higher the levels of Lutein and zeaxanthin, the less risk of developing this age-related disease.
Lutein is abundant in green, leafy vegetables such as collard greens, spinach, and kale.