Glaucoma is a group of eye diseases that damage the optic nerve and can result in partial or complete blindness if left untreated. It is often associated with elevated pressure inside the eye (known as ‘intraocular pressure’), but can also occur with normal or low intraocular pressure. Glaucoma usually progresses gradually and without symptoms, which makes regular eye exams essential for early detection and treatment. There are several types of glaucoma, including open-angle, angle-closure, and normal-tension, and treatment options include eye drops, medication, and surgery. While there is no cure for glaucoma, early intervention can help prevent or slow down the progression of the disease.