High concentrations of lutein and zeaxanthin are known to be the most effective potential antioxidants as they inhibit lipid peroxidation (a part of the aging process) in the eyes.

They can be found together in many vegetables, and they naturally occur in high concentrations in the human eye, including the lens, retina, and macular. Nowadays, it is easy to not take adequate amounts of lutein and zeaxanthin from modern food habits, and high amounts are definitely needed to protect the eyes from harmful high-energy light waves, such as ultraviolet rays in sunlight.

Studies suggest that high levels of lutein and zeaxanthin in eye tissue are associated with better vision, especially in dim light or where glare is a problem. People who take extra zeaxanthin supplement are up to 50% less likely to develop cataracts. Also, it is shown that supplements of lutein and zeaxanthin can slow the progression of macular degeneration even if you already have it.