Vitamin C (aka ascorbic acid) is a major player in eye health. It maintains lens transparency, prevents cataracts, and fights against age-related macular degeneration. The retina needs to be surrounded by vitamin C to protect itself from free radicals and promote healing if damaged. Our bodies do not naturally create vitamin C when needed, so including this in your diet is a critical part of keeping your eyes (and virtually all cells in your body) functioning properly.
Excellent sources of vitamin C include citrus fruits like oranges and grapefruits, peppers, cantaloupe, tomatoes, and broccoli. There are many tasty vitamin C supplements available from the drug store, too.