Referred to as ‘the silent thief of sight,’ this blinding disease has no outward or visual symptoms. It occurs when the pressure of fluid inside the eye exceeds the pressure of the blood supply entering the eye. Over time, this slowly deprives the optic nerve of nutrients. This “choking” of the nerve happens over many years, slowly reducing the sensitivity of your peripheral (side) vision. Because it occurs so slowly, vision changes have no symptoms until years later, when deeper vision loss occurs. At this stage, up to 70% of nerve fibers in the eye have been lost and success in preventing further loss is very low.