**1. Introduction**

Iris neovascularization and angle closure glaucoma are serious complications of a number of diseases affecting the eye. Pathologic intraocular neovascularization can be potentially blinding if not detected and treated promptly.

The first report of neovascular glaucoma was made in 1871. It was described as a condition in which the eye developed progressive neovascularization of the iris and lens, elevated in‐ traocular pressure and blindness. First called hemorrhagic glaucoma because of its associa‐ tion with bleeding of the anterior chamber, it has also been called congestive glaucoma, rubeotic glaucoma and diabetic hemorrhagic glaucoma.

During the first descriptions of this type of glaucoma, only clinical findings were mentioned, but in 1906, Coats, described the histological findings of new vessels on the iris of an eye with a history of central retinal vein occlusion. In 1928, Salus, described new vessels on the irises of diabetic patients. In 1937, with the introduction of clinical gonioscopy, the new ves‐ sels found in the angle and the histological findings were correlated, explaining the mecha‐ nism of angle closure, and in 1963, Weiss and colleagues, proposed the term neovascular glaucoma, which includes the real cause of the rise in intraocular pressure.
