However, those headaches could also be triggered by something more serious, such as glaucoma or cataracts. With glaucoma, pressure builds up inside the eye due to its inability to drain fluid properly. That eventually can damage the optic nerve. Open-angle glaucoma, which is a slow buildup of pressure, may not have any symptoms, but angle closure glaucoma, which causes a sharper increase of pressure, can cause pain blurred vision and headaches.Eyesight Max Reviews