Normal-tension Glaucoma

Normal-tension glaucoma (NTG) is a form of glaucoma, a degenerative optic nerve disease associated with vision loss. It is characterized by elevated intraocular pressure (IOP) that falls within a normal range, typically between 10 and 20 millimeters of mercury (mmHg). Unlike other forms of glaucoma, NTG is not associated with high IOP and instead is related to a more systemic condition such as hypotony or ocular perfusion pressure. As a result, it is often more difficult to diagnose and treat. NTG can be managed through the use of medications that reduce eye pressure, such as prostaglandin analogues, beta blockers, or carbonic anhydrase inhibitors, as well as by laser surgery. Treatment is aimed at preventing or delaying further vision loss.