Sweet potatoes

Although sweet potatoes have three times as much vitamin A activity as carrots (one medium roasted sweet potato provides 150% of the Daily Value), carrots are the ones that are frequently mentioned for their high vitamin A content. Vitamin A keeps the cornea healthy and is a part of the pigment rhodopsin, which converts light into electrical signals that the brain interprets as vision. Both beta carotene and vitamin A found in sweet potatoes help reduce the risk of eye infections.

In addition, a 2013 research discovered that zinc, vitamin C, and E, as well as beta carotene, can all help lower the risk of age-related eye problems. One sweet potato per day, which contains 1,403 mcg of vitamin A and provides 156% of the daily required value, is all you need to eat. Sweet potatoes are also a healthy choice for people with diabetes since they are slightly lower on the glycemic index than regular potatoes.