http://www.nei.nih.gov/health/glaucoma/glaucoma_facts.asp
National Eye Institute, National Institutes of Health
Glaucoma is a group of diseases that can lead to damage to the eye's optic nerve and result in blindness. This pamphlet is designed to help people with glaucoma better understand the disease. It describes the causes, symptoms, diagnosis, and treatment of glaucoma. It is mainly about open-angle glaucoma, the most common kind.