Abstract: Pigmentary glaucoma is a kind of secondary open-angle glaucoma with relatively simple pathogenesis. The main reason for elevated intraocular pressure is increased aqueous outflow resistance owing to an accumulation of pigment granules in the trabecular meshwork. These pigment granules can not only cause mechanical obstruction of the intertrabecular spaces, but also lead to the loss of trabecular cells which had overload phagocytized pigment granules, the fusion of trabecular lamellae with collapse of intertrabecular spaces, and the obliteration of the canal. In recent studies, the aqueous humor dynamic changes in the uveosceleral outflow pathway, complex molecular genetics and immune mechanism might be involved in the pathogenesis of pigmentary glaucoma. (Int Rev Ophthalmol, 2021, 45: 183-187)

Key words: pigment dispersion syndrome, pigmentary glaucoma,  , intraocular pressure