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Dariush Mozaffarian, Cardiology, answeredHealthy eyes depend on vitamin A as well as carotenoids that aren't transformed into vitamin A. Lutein and zeaxanthin are the only carotenoids found in the retina of the eye. Spinach and kale, two lutein-rich vegetables, appear to moderately reduce the risk of cataracts (the clouding of the normally clear lens of the eye). And one study found that women who got the most lutein and zeaxanthin through their diets had a 22% lower risk of needing surgery to remove a cataract, compared with women who got the least. Observational studies also suggest that dietary carotenoids seem to lessen the likelihood of age-related macular degeneration (AMD), a condition that leads to blurred, distorted vision and blind spots in the field of vision.