Patient Education : Dr. Seaborn Hunt Discusses Glaucoma

What Causes Glaucoma?
Clear liquid called aqueous humor circulates inside the front portion of the eye. To maintain a healthy level of pressure within the eye, a small amount of this fluid is produced constantly while an equal amount flows out of the eye through a microscopic drainage system. (This liquid is not part of the tears on the outer surface of the eye.)
Because the eye is a closed structure, if the drainage area of the aqueous humor – called the drainage angle – is blocked, the excess fluid cannot flow out of the eye. Fluid pressure within the eye increases, pushing against the optic nerve and causing damage.
What is the Most Common Type Glaucoma?
Primary open-angle glaucoma is the most common form of glaucoma in the United States. The risk of developing primary open-angle glaucoma increases with age.
The drainage angle of the eye becomes less efficient over time, and pressure within the eye gradually increases, which can damage the optic nerve. In some patients, the optic nerve becomes sensitive even to normal eye pressure and is at risk for damage. Eye care treatment or eye surgery is necessary to prevent further vision loss.
- Measure your intraocular pressure (tonometry)
- Inspect the drainage angle of your eye (gonioscopy)
- Evaluate whether or not there is any optic nerve damage (ophthalmoscopy)
- Test the peripheral vision of each eye (visual field testing, or perimetry)
- Stinging or itching within your eyes
- Red eyes or redness of the skin surrounding the eyes
- Changes in pulse or heartbeat
- Changes in energy level