Epiretinal
Membrane (ERM)
Epiretinal
Membrane (ERM)
An ERM is a layer of thin scar tissue on the surface of the macula which results in a mechanical wrinkling and distortion of the retina leading to distorted, decreased vision. ERM may also be known as a macular pucker. The scar tissue may form as a result of trauma, or when the vitreous gel detaches from the retina.
 | Mild loss of visual acuity |
| Blurred vision |
| Double vision that is noticeable even with one eye covered |
| Distorted vision (straight lines may appear bent or wavy) |
The doctor is able to detect an ERM during an examination of the retina. It has a glistening, cellophane-like appearance. The affect of an ERM on the patient's central vision is assessed with a visual acuity test and the Amsler Grid. Patients are asked to monitor a grid weekly, to detect any progression of the membrane.
Treatment
An ERM can
only be removed by surgical procedure. Surgery for an ERM is
recommended one the vision has decreased, and the membrane
progresses. Vitrectomy surgery is performed in the hospital setting.
Using microscopic forceps, the surgeon carefully removes the scar
tissue from the retina. By removing the scar tissue, this allows the
retina to flatten out, and regain its normal shape. The retina may
take many months after surgery to regain its full potential after
the membrane is removed.