Dr MJ Carey We care about
your vision






About the Anatomy of the human Eye
Eye Disorders & Diseases
About Eye Anatomy and Disorders

In the healthy eye, a clear fluid called aqueous humor circulates inside the front portion of your eye, nourishing the lens, iris and cornea. To maintain a constant healthy eye pressure, your eye continually produces a small amount of aqueous humor while an equal amount of this fluid flows out of the inner part of the eye through the pupil and then is absorbed into the bloodstream through a meshwork of little drainage canals, all around the outer edge of the iris. The production, flow and drainage of the fluid is an active, continious process that is necessary for the health of the eye.

If you have glaucoma, the fluid does not flow out of the eye properly. Fluid pressure in the eye builds up and, over time, causes damage to the optic nerve fibers. If the pressure remains high, and goes untreated it can cause blindness. As the disease progresses and more damage occurs, blind spots develop in your peripheral (side) vision. These spots may not be noticeable until the optic nerve has become severely damaged - or until detected by an ophthalmologist during a complete exam.

Acute glaucoma is rare and strike suddenly and painfully. Chronic glaucoma is more common and creeps up on a person without him knowing it and slowly robs him of his eyesight. Glaucoma usually occurs in both eyes, but extra fluid pressure often begins to build up first in only one eye. It occurs in people of all ages, from children to older adults, but it is more likely to develop in people who are over 35 years old, very near-sighted, or diabetic.

Vision lost as a result of glaucoma usually cannot be recovered, but early diagnosis and careful, lifelong treatment can help prevent further visual damage. Ophthalmologists recommend a glaucoma check as part of a regular eye examination.

Risk Factors

Intraocular pressure
The most important risk factor is elevated intraocular pressure, although glaucoma can occur even with normal pressure readings.
Blood supply
Disturbance of the vessels supplying blood to the optic nerve can result in glaucoma. People with low blood pressure or general circulatory problems are particularly at risk.
A family history
A history of glaucoma in the family can put you at a higher risk, go for regular eye examinations no matter what your age.
Medicines that contain cortisone or similar active constituents can increase your risk.


Your specific type of glaucoma and /or the severity of your disease will determine how you’ll be treated. Medicated eyedrops are the most common way to treat glaucoma. These eyedrops lower your eye pressure in one of two ways - either by slowing the production of aqueous humor or by improving the flow through the drainage angle. In some patients with glaucoma, surgery is recommended. Glaucoma surgery improves the flow of fluid out of the eye, resulting in lower eye pressure.