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BOOK TITLE: Retina: Medical and Surgical Management
An epiretinal membrane (ERM) is an accumulation of fibrocellular tissue on the surface of internal limiting membrane of the central retina. An ERM develops on the inner retinal surface due to the abnormal fibrocellular proliferation. During the course of posterior vitreous detachment (PVD), schisis of the posterior vitreous may occasionally occur, leaving a sheet of posterior cortical vitreous still adhered to the macula (vitreoschisis), over which cellular membranes may proliferate, leading to formation of an ERM. Idiopathic ERMs are most frequently found to affect individuals over the age of 50 years, with no sexual predilection. The optical coherence tomography helps in the evaluation of cases of ERM and helps in deciding the surgical approach. The majority of patients with ERMs are asymptomatic and hence, no treatment is indicated. This chapter mainly focuses on ERM, which includes pathophysiology, classification, epidemiology, clinical features, diagnosis, management and surgical techniques, prognostic factors, and role of chromovitrectomy in ERM removal surgery.