Pigmented glaucoma

Secondary open-angle glaucoma caused by pigment spread in the anterior segment of the eye is called pigmented glaucoma. In 1949, Sugar made a detailed report on pigment dispersion syndrome and proposed the name of pigmented glaucoma. This type of glaucoma accounts for 1.0% to 1.5% of glaucoma in western countries, but it is rare in our country. It is characterized by a lack of pigment in the surface layer of the iris in the middle and peripheral parts of the eyes, accompanied by pigment deposition in the eye tissues behind the cornea, trabecular meshwork, iris and lens. The transradiation method was used to check the radial light-transmitting area of ​​the iris, and the pigment was released from the iris pigment epithelium, and was deposited on the lens suspensory ligament, the lens, the posterior cornea wall, the anterior surface of the iris, the trabecular meshwork and the peripheral retina through the aqueous humor circulation. After a long time, the pigment is accumulated in the aqueous humor drainage channel.