"Glaucoma results from damage to the optic nerve. Usually the damage is from increased pressure in the eye. The damage to the eye is irreversible and glaucoma can lead to blindness. The most common form, open-angle glaucoma, generally appears in middle age and seems to have a genetic component. In this type of glaucoma, vision loss occurs very gradually. One eye is often worse than the other. Other types of glaucoma are closed-angle glaucoma (a medical emergency) and congenital glaucoma (present at birth). Secondary glaucoma is usually associated with another eye disease or disorder, such as a very mature cataract, uveitis, bleeding, eye tumor, or an eye injury.
Glaucoma Questions and Answers
If you or someone you love has been diagnosed with glaucoma, these questions and answers from the experts at WebMD can give you more information about the disease.
Perimetry Test (Visual Field Testing) for Glaucoma
A perimetry test (visual field test) measures all areas of your eyesight, including your side, or peripheral, vision.To do the test, you sit and look inside a bowl - shaped instrument called a perimeter. While you stare at the center of the bowl, lights flash. You press a button each time you see a flash. A computer records the spot of each flash and if you pressed the button when the light flashe
Frequently Asked Questions About Eye Conditions
These questions address key issues about such eye conditions such as cataracts, macular degeneration, glaucoma, and diabetic retinopathy.
What Is Normal-Tension Glaucoma?
Normal tension glaucoma is an eye condition that can lead to vision loss. Learn more and find out what you can do to help protect your sight.
Slideshows & Images
Slideshow: Essential Screening Tests Every Man Needs
Pictures show men the health screenings a doctor may recommend based on age and personal risk factors.
Slideshow: What Eye Problems Look Like
What do nearsightedness, farsightedness, or going blind look like? See these views and take an eye test in this slideshow from WebMD's medical editors.