Glaucoma is caused by increased pressure in the eyeball, which causes damage to the cells that connect the eye to the brain, resulting in vision loss. Glaucoma is often called the silent thief of vision because patients cannot feel that the pressure is high in their eyes and the vision loss begins as side vision loss. Glaucoma is an age related condition often times but genetics and race play a large role as well. At ForSight, we screen your eyes for glaucoma every time you have an exam by our doctor.