An epiretinal membrane is a thin sheet of fibrous tissue on the surface of the retina along the inner limiting membrane. It appears as a greyish semi-translucent avascular membrane over the internal limiting membrane (ILM) on the surface of the retina. The phenotype is Human Phenotype Ontology identifier HP_0100014 (Epiretinal membrane). Also known as: Cellophane maculopathy, Macular pucker, Premacular fibrosis, Surface wrinkling retinopathy.