Objective To observe morphological and functional changes in the macular in eyes with different kinds of secondary epiretinal membranes(SEM) and to explore the significance of surgical treatment.Methods A retrospective,observational case series of 55 patients with SEM who underwent pars plana vitrectomy and membrane peeling during October 2008 and August 2012 were included.The causes of SEM were classified.Changes in macular morphology before and after the surgery were observed by optical coherence tomograp...