Glaucoma is an eye condition that causes damage to the eye’s optic nerve. The optic nerve carries information about what is being seen from the eye to the brain. As the nerve becomes damaged over time, vision is lost. This can result in misty and patchy vision. The condition is often linked to a buildup of pressure inside the eye. As this pressure increases, damage to the optic nerve can occur. If the damage continues, it can eventually lead to permanent vision loss. Without treatment, glaucoma may result in total blindness within a few years.