Glaucoma in the far-sighted, who have smaller-than-normal anterior chambers, making physical contact between the iris and trabecular meshwork more likely. Normal-tension glaucoma (also "NTG", "low-tension glaucoma", "normal-pressure glaucoma") is a condition where the optic nerve is damaged although intraocular pressure (IOP) is in the normal range (12-22mm Hg). Individuals with a family history of NTG, those of Japanese ancestry, and those with a history of systemic heart disease are at higher than average risk of developing NTG. The cause of NTG is unknown. Secondary glaucoma refers to any case in which another disease, trauma, drug or procedure causes increased eye pressure,
Minimally invasive glaucoma surgery to augment outflow to the suprachoroidal space in order to control intraocular pressure; it is indicated for the treatment of primary open-angle glaucoma. The stent is implanted through an ab interno approach and inserted into the supraciliary space (between the ciliary body and sclera), effectively creating a controlled cyclodialysis cleft, which is kept open by the device. The first clinical data on the device was presented in 2010 showed sustained IOP lowering and MIGS-like safety profile. This has been substantiated in subsequent studies in the combined setting with cataract surgery and as a stand-alone treatment for patients failing glaucoma topical