Glaucoma is a disease that damages the optic nerve located at the back of your eye. The optic nerve is connected to your retina, the thin tissue lining at the back of your eye. Healthy eyes produce a clear fluid called aqueous humor which circulates in the front portion of your eye. This fluid is produced in small amount while equal amounts of it flow out of your eye. When the aqueous humor does not flow out of the eye properly, the increased volume causes the pressure in your eye to rise. When the intraocular pressure (IOP) rises the optic nerve can be damaged. There are several types of glaucoma including open-angle glaucoma, normal-tension glaucoma, narrow-angle glaucoma and congenital glaucoma.For more information see the American Academy of Ophthalmology article on Glaucoma
By Jason S. Calhoun
Mayo Clinic Jacksonville, Florida
Uploaded on Sep 17, 2015.
Last modified by Caroline Bozell on Nov 10, 2015.