Difference Between Glaucoma and Cataract: Understanding Eye Health When it comes to eye health, two of the most recognized eye 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 has a noticeable impact on vision, http://We ran into a problem. If you're in private mode (incognito), switch to regular browsing or try again later.