epiretinal membrane

epiretinal membrane
a transparent membrane that forms on the retina, over the macula. Contraction of this causes wrinkling of the retina (macular pucker) and hence distorted vision.

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a pathologic membrane partially covering the surface of the retina, probably originating chiefly from the cells of the pigment epithelium and glia; membranes peripheral to the macula are generally asymptomatic, while those involving the macula or adjacent to it may cause reduction in vision, visual distortion, and diplopia.

Medical dictionary. 2011.

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