Vision changes are common with aging and many can be corrected. Older adults are at higher risk for age-related eye diseases like macular degeneration, cataracts, glaucoma, and diabetic retinopathy. Everyone over 50 should have a comprehensive dilated eye exam at least once every two years to check for diseases and vision problems. Maintaining eye health involves regular exams, eating a healthy diet, controlling blood sugar and pressure, wearing sunglasses, and not smoking.