Glaucoma is the name for a group of eye diseases that damage the optic nerve. This nerve carries information from the eye to the brain. When the nerve is damaged, you can lose your vision.
Glaucoma is one of the most common causes of legal blindness in the world. At first, people with glaucoma lose side (peripheral) vision. But if the disease isn't treated, vision loss may get worse. This can lead to total blindness over time.
There are three types of glaucoma.
The exact cause isn't known. Experts think that increased pressure in the eye (intraocular pressure) may cause the nerve damage in many cases. But some people who have glaucoma have normal eye pressure.
Some people get glaucoma after an eye injury or after eye surgery. Some medicines (corticosteroids) that are used to treat other diseases may also cause glaucoma.
If you have OAG, the only symptom you are likely to notice is loss of vision. You may not notice this until it is serious. That's because the eye that is less affected makes up for the loss at first. Side vision is often lost before central vision.
Symptoms of CAG can be mild, with symptoms like blurred vision that last only for a short time. Severe signs of CAG include longer-lasting episodes of blurred vision or pain in or around the eye. You may also see colored halos around lights, have red eyes, or feel sick to your stomach and vomit.
In congenital glaucoma, signs can include watery eyes and sensitivity to light. Your baby may rub his or her eyes, squint, or keep the eyes closed much of the time.
Glaucoma can be diagnosed:
Glaucoma can't be cured. But there are things you can do to help stop more damage to the optic nerve. To help keep your vision from getting worse, you'll probably need to use medicine (most likely eyedrops) every day. You may also need laser treatment or surgery. You'll also need regular checkups with your eye doctor.
If you have vision loss, you can keep your quality of life. You can use vision aids, such as large-print items and special video systems, to help you cope with reduced eyesight. Support groups and counseling can also help you deal with vision loss.
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