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). Each condition can greatly affect vision, but they differ in how http://We ran into a problem. If you're in private mode (incognito), switch to regular browsing or try again later.