Eye Diseases Allergy Are you bothered by red, itchy eyes? You may have allergies. Blepharitis Red, swollen eyelids and crusty debris at the base of your eyelashes are signs you may have blepharitis. Cataracts Cataracts are a common cause of vision loss. Learn more about recognizing cataracts symptoms and understanding cataract surgery. Conjunctivitis This is an infection or inflammation of the transparent membrane that covers the white part of the eye. Corneal Endothelial Dystrophy The back of the cornea is called the endothelium, and diseases of the corneal endothelium are called corneal endotheliopathies. Corneal Neovascularization This condition is characterized by new blood vessels growing into the cornea. Diabetic Retinopathy How does diabetes affect vision? Learn more about eye problems resulting from diabetes. Macular Degeneration Macular Degeneration is an eye disease that affects the portion of the eye responsible for processing fine detail and providing sharp central vision (called the macula). Ocular Migraine Headaches This condition is characterized by visual disturbances accompanied by a headache. Pinguecula and Pterygium These common conjunctival degenerations can cause increased eye redness and produce ocular discomfort. Spots and Floaters “Floaters” are usually normal and harmless. But if you notice a sudden increase in floaters or floaters accompanied by flashes of light, see your eye doctor immediately. Styes and Chalazion These common problems are usually caused by infected or inflammed glands in the eyelids. Learn about prevention and treatment. Subconjunctival Hemorrhage This condition is characterized by the sudden appearance of blood on the white part of the eye. Uveitis This inflammatory eye disease can cause permanent vision loss if not promptly treated. Vitreous Detachment As we get older, the fluid inside the eye may condense, contract and separate from the back of the eye.