Glaucoma is an eye disease that is called “the sneak thief of sight,” because vision loss is often the first sign. If left untreated, it leads to vision loss by causing damage to the optic nerve. The optic nerve is located in the back of your eye and sends images to your brain, allowing you to see. Damage to the optic nerve is often caused by high eye pressure. High eye pressure is the #1 risk factor for glaucoma. With early diagnosis of high eye pressure and effective treatment options, your risk for vision loss due to this disease can be reduced.