Glaucoma is an eye condition which can lead to characteristic damage of the optic nerve and loss of vision. Glaucoma is most commonly associated with high eye pressure, or intraocular pressure (IOP). High eye pressure occurs when aqueous fluid, which is made inside the eye, cannot adequately drain through the outflow channels of the eye known as the trabecular meshwork. High eye pressure without glaucoma is known as ocular hypertension. People with ocular hypertension are at increased risk for developing glaucoma. Primary open angle glaucoma is the most common type of glaucoma and is associated with a painless increase in eye pressure. If untreated, the high eye pressure eventually leads to irreversible damage of the optic nerve which can be seen as increased “cupping” of the optic nerve. Because early primary open angle glaucoma is often asymptomatic, it is important to have routine annual eye exams and possible glaucoma Diagnostic Tests such as visual field tests. Acute angle closure glaucoma is less common and is caused by a sudden painful increase in eye pressure which can lead to eye redness, blurry vision, and nausea and vomiting; this is an eye emergency. Some factors which can be associated with the development of glaucoma include chronic corticosteroid use, eye injury, eye inflammation, and having a family history of glaucoma. Ocular hypertension and early glaucoma can be treated with medicated eye drops to lower the eye pressure. Lowering the eye pressure prevents damage to the optic nerve and loss of vision. Because damage to the optic nerve and loss of vision from glaucoma is not reversible, it is important to use the glaucoma eye drops as directed by your eye doctor. Other Glaucoma Treatment includes laser treatment to lower the eye pressure. Advanced glaucoma may require glaucoma surgery to control the eye pressure.