Glaucoma is not a singular eye disease, but is instead a term for several eye conditions that can damage your optic nerve. Glaucoma is usually the result of abnormally high pressure inside the eye. Over time, the increased pressure can erode the optic nerve tissue, which may lead to vision loss or even blindness.

The eye, Over time, the increased pressure can erode the optic nerve tissue, which may lead to vision loss or even blindness. Open-Angle (Chronic) Glaucoma, Angle-Closure (Acute) Glaucoma, Congenital Glaucoma, Secondary Glaucoma and Normal-Tension Glaucoma are five main types of glaucoma.