Glaucoma is a group of eye diseases that cause the optic nerve to be damaged and the visual field to be permanently lost. Optic nerve damage is caused by increased intraocular pressure, however, it can also occur with normal IOP. Glaucoma is characterized by rising intraocular pressure, which leads to visual field degeneration and, eventually, vision loss. Schedule a consultation with your ophthalmologist. If you have a genetic history of glaucoma or notice any symptoms of glaucoma, you should visit a doctor to determine the best treatment option for you.