Background Macular epiretinal membranes, whether idiopathic or seconda
ry to vitreo-retinal pathology may result in a lowering of central vis
ion and/or metamorphopsia following a distorsion of retinal tissue. Al
though an adequate surgical peeling procedure is known to result in a
functional improvement, the criteria for patient selection for such in
tervention are, as yet not clearly established. Methods and results In
order to establish prognostic indicators of a good visual recovery, w
e studied 25 cases of epiretinal membrane. Our results showed an impro
vement in visual acuity of 2 or more Snellen lines among 84% of our pa
tients, regardless of their initial visual acuity. The duration of sym
ptoms prior to intervention was found to be a prognostic factor wherea
s the presence of macular edema detected preoperatively on fluorescein
angiography had no effect on the final visual outcome. Conclusion A c
ommom post-operative complication came to our attention: secondary opa
cification of the cristalline lens.