Glaucoma, an eye disease that can cause irreversible blindness, is a major health concern worldwide. It is caused by a build-up of fluid in the eye, which leads to increased pressure inside the eye. This pressure can in turn damage the optic nerve, and thus lead to blindness. Pressure can be lowered with eyedrops or laser treatment, but often surgery is needed to drain fluid and lower pressure more effectively. Nonetheless, complications can arise afterwards.
Source: Medical Xpress