Perioperative prevalence of epiretinal membranes in eyes with senile cataract

Background Results from epidemiologic studies suggest that cataract extract ion is a risk-factor for the formation of epiretinal membranes (EM). Patients and Methods 250 consecutive eyes which underwent uneventful phakoe mulsification with implantation of a posterior chamber intraocular lens wer e examined within two weeks prior and an two weeks after surgery for the pr esence of epiretinal membranes. Cellophane macular reflex (CMR) was disting uished from macular pucker (MP). Results We found an increase in the prevalence of epiretinal membranes from preoperatively 12/250 (4.8%) to postoperatively 33/250 (13.2%). The preval ence of CMR increased from 8/250 (3.2%) to 27/250 (10.8%). The prevalence o f MP remained almost the same 4/250 (1.6%) prior and 6/250 (2.4%) after sur gery. Conclusions Increased prevalence of epiretinal membranes following cataract extraction observed in epidemiological studies can be explained by easier detection of such membranes in pseudophakic eyes where the observer gets a clear view of the fundus. Therefore it is questionable whether uneventful e xtracapsular cataract extraction can induce the formation of epiretinal mem branes.