Illinois Society for the Prevention of Blindness

At its onset, open-angle glaucoma usually has no symptoms.

There is no pain, no blurring of vision, and no ocular inflammation to alert people that they have the disease. But as open-angle glaucoma progresses, it will slowly and insidiously begin to destroy peripheral vision. It is at this point that most people seek treatment, but tragically, vision that has already been lost from glaucoma cannot be restored.