Chronic Angle-Closure Glaucoma Causes, Risk and Diagnosis
Doctors do not know for sure what causes chronic angle-closure glaucoma. They think there may be many causes, including:
- a lens that is too large (keeping fluid from flowing normally through the pupil).
- an iris that is thicker than normal
- an iris with a roll on the side that blocks fluid (called "plateau iris")
One or more of these factors can cause a gradual closing of the drainage angle, leading to a rise in eye pressure.
Who is at risk for chronic angle-closure glaucoma?
Some people have a higher than normal risk of getting angle closure. This includes people who:
- are over age 50
- have family members with angle-closure glaucoma
- are of Asian or Inuit heritage
- are female
- are farsighted
- have an unusually small eye or a large lens inside the eye
Talk with an ophthalmologist about your risk for getting glaucoma. People with more than one of these risk factors have an even higher risk of angle-closure glaucoma.
How is chronic angle-closure glaucoma diagnosed?
The only sure way to diagnose chronic angle-closure glaucoma is with a complete eye exam. A glaucoma screening that only checks eye pressure is not enough to find chronic angle-closure glaucoma.
During a glaucoma evaluation, your ophthalmologist will: