Open-angle Glaucoma

Credit: National Eye Institute, NIH
With all types of glaucoma, the nerve connecting the eye to the brain is damaged, usually due to high eye pressure.
The most common type of glaucoma (open-angle glaucoma) often has no symptoms other than slow vision loss. Angle-closure glaucoma, although rare, is a medical emergency and its symptoms include eye pain with nausea and sudden visual disturbance.
Treatment includes eye drops, medications, and surgery.