Glaucoma is an eye disease in which the main nerve (the optic nerve) connecting each eye to the brain undergoes
progressive deterioration in a characteristic way.
Deterioration of the optic nerve leads to slow, progressive loss of peripheral (side) and central vision.
The only known treatment for glaucoma is lowering internal eye pressure with either medication or, in more
cases, surgery. Lowering of eye pressure decreases the risk of further loss of vision due to glaucoma but does
restore vision that has already been lost.
This disorder damages the optic nerve at the rear of the eye, causing loss of vision. It can progress so gradually that the person doesn't notice until significant damage has occurred.
Narrow angle glaucoma results from a blockage of the internal drainage channel of the eye. This may result in a
sudden elevation of internal eye pressure leading to permanent optic nerve damage within hours. Or eye pressure
slowly rise over several years, causing progressive optic nerve damage. Some people are at risk based on their
This disorder damages the optic nerve at the rear of the eye, causing rapid loss of vision. It can strike suddenly and progress quickly.
Laser peripheral iridotomy (LPI) is a procedure in which a tiny microscopic opening is made in the iris so
eye pressure is lowered.
A group of eye disorders are common causes of secondary glaucoma including
pigment dispersion (pigment in the iris flakes off and blocks eye drainage),
pseudoexfoliation (flaking of the outer layer of the lens in the eye), eye injury,
neovascularization (abnormal blood vessel formation), eye inflammation and prior eye surgery.
The signs and symptoms of secondary glaucoma differ based on the specific underlying disorder. In some types of
secondary glaucoma such as neovascular glaucoma, vision loss and pain may occur suddenly. In other types of
secondary glaucoma such as pseudoexfoliative and pigmentary glaucomas, vision loss may occur in a slow, painless
The treatment of secondary glaucoma varies based on the exact cause but usually
includes medications, laser surgery or standard surgery.
This outpatient procedure is designed to reduce excess fluid pressure in the eye caused by glaucoma. It does this by reducing the production of aqueous humor, a clear fluid in the eye.