Glaucoma is a slowly progressive 'optic' neuropathy, which, in the majority of cases, is due to high intraocular pressure (IOP). The monitoring of glaucoma is fundamentally based on reducing IOP. The most common treatments for glaucoma are eyedrops which have to be used every day and continuosly to keep the IOP within the recommended limits for each case. Other methods of treatment include laser treatment or surgery when the eyedrops are no longer effective. There is no definitive treatment for glaucoma, in fact, glaucoma is only under control—but not cured—when the IOP has dropped to safe levels.