Sweet potatoes gained popularity in the 2000s as a "superfood" due to their high concentration of vitamins, minerals, and antioxidants. Antioxidants have been shown to aid eyes throughout the aging process by preventing cataracts and other age-related conditions. Antioxidants also help reverse oxidative stress in the eyes by eliminating free radicals in the retina. Sweet potatoes are also rich in beta-carotene, an important nutrient that aids in night vision.

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