Glaucoma describes a group of eye disorders that causes damage to the optic nerve. This degenerative eye disease is one of the leading causes of chronic blindness in the US. Open-angle glaucoma is the most common form of glaucoma in the United States.

Open-angle glaucoma can often be controlled well with proper treatment, and most patients who receive treatment will maintain their vision.

Glaucoma
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Open-angle glaucoma is caused by increased intraocular pressure. Within the eye, fluid is made and then drained from the eye. If either the fluid is made too quickly (not common) or drains too slowly, then the pressure of the eye can increase, leading to damage to the optic nerve.

This damage to the optic nerve can lead to a decrease in peripheral vision and may eventually cause blindness.