Glaucoma is a disease of the optic nerve of the eye. One known risk factor for glaucoma is increased pressure inside the eye, known as intraocular pressure. Typically, there are no symptoms at first. Early findings are discovered with eye examinations. If undetected, glaucoma can progress with individuals 
losing peripheral vision initially, and then losing central vision if allowed to progress.
People at risk, include those of increased age, steroid use (pill, drop, ointment, and nasal spray), family history of glaucoma, and African Americans over the age of 40, should get at least annual eye exams to monitor for potential glaucoma.