Perfectly healthy eyes—excellent vision and clear eyes, free of pain or other symptoms—are key to your health and well-being. In 2020, the Centers for Disease Control and Prevention (CDC), in the United States, about 21 million people have vision problems. Many of those problems are relatively benign, such as mild nearsightedness. But other eye conditions, like glaucoma and age-related macular degeneration (AMD), can trigger vision loss and even blindness. Although many people start developing eye diseases in middle age, their symptoms may not appear until later, when the condition is advanced and more difficult to treat. Learn more about eye problems, symptoms, and treatments that keep your eyes healthy. Some people…