We all have good reasons to be aware of the potential threat that glaucoma poses to vision. Not only is this eye disease the leading cause of irreversible vision loss worldwide, but its most common form does not initially cause noticeable symptoms. For this reason, glaucoma is referred to as the “sneak thief of sight,” which strikes young and old alike. Thus, it is very important to schedule comprehensive eye exams on a regular basis in order to properly screen for glaucoma. Unless glaucoma is detected and treated early, the buildup of intraocular (inner eye) pressure associated with the disease will lead to optic-nerve damage. Fortunately, glaucoma can be controlled and vision loss can be halted with early treatment. The vision loss associated with glaucoma first begins with loss of peripheral (side) vision, which is not noticeable. Glaucoma is a disease of the optic nerve – the part of the eye that carries the images we see to the brain. When damage to the optic nerve fibers occurs, blind spots develop. Early detection and treatment are the keys to preventing optic nerve damage and blindness from glaucoma.