Epiretinal membranes are avascular, fibro-cellular membranes that proliferate on the surface of the retina. These membranes have contractile properties and patients may present with metamorphopsia and visual changes because of their effect on the underlying retina. Epiretinal membrane surgery usually implies pulling the ERM itself and commonly the internal limiting membrane, exerting forces on the retina that may easily damage and dislocate its cellular and extracellular components. Besides that, the use of different dyes or the use of one dye several times in one procedure may cause cellular toxicity and affect homeostasis. We selected 7 patients aged between 65 and 79 years with idiopathic epiretinal membrane. Preoperative visual acuity were ≥0.2 (decimal scale). In our department we performed 23-gauge vitrectomy and peeling of the ERM and ILM in one single step, using only one dye – a mixture of trypan blue with brilliant blue (membrane dual). Among the advantages of this technique are less cellular toxicity and less distortion of cellular architecture. To morphologically analyze the macula, serial OCTs were performed before and after surgery using the Spectralis® SD-OCT. Macular OCTs show a slow improvement in macular thickness. We decided to perform microperimetry before surgery and 6 months after to functionally analyze the macular area. ERM surgery is a common procedure in our department and we should take caution to prevent complications and to perform a safer and faster procedure.