Epiretinal Membranes are also known as macular puckers and cellophane retinopathy. 

The macula is the area of the retina at the back of the eye that is responsible for our reading vision. In the macula the retina typically lays flat on the back of the eye. If a layer of cells form on the surface of the macula and contract the retina then becomes wrinkled, this is known as an epiretinal membrane. This wrinkling of the retina can cause straight lines to appear curved and the retina to swell resulting in a decrease in vision. The wrinkling and swelling of the retina can most effectively be treated with vitrectomy surgery and removal of the epiretinal membrane.

Please visit the following site for more information on epiretinal membranes: Epiretinal Membranes

Examples of epiretinal membranes:

To compare photographs please see Fluorescein Angiography and Ocular Coherence Tomography