Glaucoma is a complex eye disease that can lead to blindness by damaging the optic nerve. The disease is often associated with a buildup of pressure inside the eye. The increased pressure, called intraocular pressure, can damage the optic nerve, which transmits images to the brain. If damage to the optic nerve from high eye pressure continues, the disease will cause permanent loss of vision. Without treatment, glaucoma can cause total permanent blindness within a few years.
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