Exercise regularly: Exercise can help prevent or control diabetes, high blood pressure, and high cholesterol. These diseases can lead to some eye or vision problems. So by exercising often, you can reduce your risk of these problems. Wear sunglasses: The exposure to the sun can damage the eyes and increase the risk of cataracts and age - related macular degeneration with age . Protect your eyes with sunglasses that block 99 to 100 percent of UVA and UVB does vision 20 really work radiation. Wear protective glasses: To avoid eye injuries , you need eye protection, for example when playing certain sports, working in factories or construction, and doing repairs or projects around your home. Avoid smoking: Smoking increases the risk of developing age-related eye diseases, such as macular degeneration and cataracts; and it can damage the optic nerve . Know your family medical history: Some eye diseases run in families , so it is important to find out if anyone in your family has had them.