"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.
Understanding Glaucoma Symptoms
Learn about glaucoma symptoms from the experts at WebMD.
Which Medicines Treat Glaucoma?
The goal of glaucoma treatment is to keep you from losing any vision. Your doctor will likely prescribe some of these things to help prevent problems with your eyes.
What Is Angle Recession Glaucoma?
Learn how an eye injury can lead to vision loss and what you can do to help protect your sight.
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: A Visual Guide to Glaucoma
Learn how glaucoma can affect your vision, and how your doctor diagnoses and treats it.
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.