Glaucoma is the second leading cause of blindness in the world, damaging your vision so gradually that you may not notice any loss of vision until the disease is at an advanced stage. The most common type of glaucoma, primary open-angle glaucoma, has no noticeable signs or symptoms except gradual vision loss.
Glaucoma results in optic nerve damage, which causes loss of vision. Damage is usually caused by abnormally high pressure inside your eye (intraocular pressure).
It’s important to get your eyes examined regularly. Early diagnosis and treatment can minimize or prevent optic nerve damage and minimize vision loss.