Normal tension glaucoma Normal tension glaucoma Normal tension glaucoma (NTG) is an eye disease, a neuropathy of the optic nerve, that shows all the characteristics of "traditional" glaucoma except one: the elevated intraocular pressure (IOP) - the classic hallmark of glaucoma - is missing. Normal tension glaucoma is in many cases closely associated with general issues of blood circulation and of organ perfusion like arterial hypotension, metabolic syndrome, and Flammer syndrome. Over many years, glaucoma has been defined by an intraocular pressure of more than 20 or 20 mm Hg. Incompatible with this (now obsolete) definition of glaucoma was the ever larger number
Glaucoma glaucoma in humans. It follows, then, that oral vitamin supplementation is not a recommended treatment for glaucoma. Caffeine increases intraocular pressure in those with glaucoma, but does not appear to affect normal individuals. Many people of East Asian descent are prone to developing angle closure glaucoma due to shallower anterior chamber depths, with the majority of cases of glaucoma in this population consisting of some form of angle closure. Other Asians such as South Asians are also prone to developing angle closure glaucoma. Higher rates of glaucoma have also been reported for Inuit populations, compared to white populations, in Canada