I'm blind! I can't see!

I can't see? Wait! Why can't I see!
My sight is failing! I'm going blind!
No, you're not crazy, it could be glaucoma.

Glaucoma is a group of eye diseases that gradually steal sight without any warning.
About half of the people affected by glaucoma don't even know they have it.
Glaucoma is a leading cause of blindness. Around three million people have it.
Everyone is at risk for glaucoma,
but African-Americans and senior citizens are at a higher risk.
Vision loss is caused by damage to the optic nerve,
which carries images from the eye to the brain.
Glaucoma sometimes accompanies people who are near or farsighted.
Or people with lots of pressure on the optic nerve.
People usually don't know that they have glaucoma until, a. they start having significant vision loss,
or b. they get tested at an opthamologist and are positive.