Peliot, I hope you're still reading this forum. I've had two surgeries to peel the same epiretinal membrane, so I have a lot of information to share with you about that procedure. My first (botched) surgery actually caused the type of image size difference which you described having. This problem is called "aniseikonia," and it is associated with a number of unpleasant symptoms. There's good information about it at www.opticaldiagnostics.com
(but you have to do some searching around the website to find it.)
I wish I could send you a PM. Please post again about how you are doing.