Difference between Glaucoma and Cataract: Understanding Eye Health When it comes to eye health, two common conditions that people often hear about are glaucoma (a condition affecting the optic nerve) and cataracts (a condition that clouds the eye’s lens). Both can greatly affect vision, but they are quite different in http://We ran into a problem. If you're in private mode (incognito), switch to regular browsing or try again later.