What does epiretinal membrane over the mascula mean?

Yes. An epiretinal membrane is a thin scar tissue-like layer that can distort the macula or cause swelling. Sometimes a pucker is referred to as "scar tissue on the retina", and "epiretinal gliosis." when appropriate, surgery to remove the pucker may be a good idea to halt vision deterioration, or modestly improve vision. Best to see a retina specialist for this kind of problem.
Wrinkle on Retina. Macular pucker or epiretinal membrane results in formation of a thin layer of scar tissue which distorts the retina. It is caused by cells migrating through a tiny hole or from inflammation. If the symptoms of blurring and distortion are severe enough, then surgery may be needed.