Research suggests that antioxidants and other important nutrients may reduce your risk of cataracts and macular degeneration. Specific antioxidants can have additional benefits as well. For example, vitamin A protects against blindness, vitamin C may play a role in preventing or alleviating glaucoma, and Omega-3 essential fatty acids appear to help the eye in a variety of ways, from alleviating symptoms of dry eye syndrome to guarding against macular damage.
https://www.allaboutvision.com/nutrition/nutrition_summary.htm#infoq