Epiretinal Membrane
When the posterior vitreous separates from the back of the eye, occasionally remnants of the vitreous may remain on the macula. In most cases, these remnants cause no problems. Very occasionally, these remnants may thicken and contract like scar tissue, causing distortion and thickening of the macula. Epiretinal membranes do not require any treatment unless they affect vision. In fact, 9 out of 10 epiretinal membranes discovered incidentally do not cause any vision problems at any point. Most epiretinal membranes are related to otherwise straight forward posterior vitreous detachments although some cases can be due to diabetic retinopathy, retinal detachment, blockage of retinal vessels, previous eye surgery and inflammation inside the eye.