Eating well will be an excellent way to contribute to healthy eyes. Nutrients such as lutein, omega-3 fatty acids, vitamins C and E as well as zinc may contribute to preventing vision issues related to age, such as cataracts and macular degeneration. To obtain these vital nutrients, consume plenty of leafy green vegetables (such as kale, spinach and collards), oily fish like tuna and salmon, nuts, eggs, beans, citrus fruits, pork and oysters. A healthy diet will also ward off obesity and associated conditions such as type 2 diabetes, a disease that can cause blindness.