TY - JOUR T1 - The role of the optical coherence tomography in identifying shape and size of idiopathic epiretinal membranes JF - British Journal of Ophthalmology JO - Br J Ophthalmol SP - 867 LP - 871 DO - 10.1136/bjophthalmol-2011-300629 VL - 96 IS - 6 AU - Bilal Hajnajeeb AU - Michael Georgopoulos AU - Ramzi Sayegh AU - Wolfgang Geitzenauer AU - Ursula Schmidt-Erfurth Y1 - 2012/06/01 UR - http://bjo.bmj.com/content/96/6/867.abstract N2 - AIM Currently, the border of idiopathic epiretinal membranes (iERM) is outlined intraoperatively using vital dyes. Therefore, the authors set out to investigate the role of the preoperative retinal thickness map (RTM) of the optical coherence tomography (OCT) in identifying the shape and the size of the iERMs.Methods 15 eyes of 15 patients with iERM who underwent vitrectomy with indocyanine green-assisted membrane peeling were included in this study. The authors analysed the intraoperative fundus images and preoperative Cirrus HD-OCT to detect the shape and the size of the iERM as well as the shape and the size of each thickness-indicating colour (white, red, orange and yellow) on the RTM, respectively. The correlation of areas and morphologic characteristics between both groups was explored.Results Analysis of iERM morphologic characteristics (shape) showed a similarity between the iERM contour and the corresponding RTM in 13 cases (86.6%). Furthermore, retinal folds were found in six iERMs and in their corresponding RTMs. Analysis of iERM size (area) revealed a positive correlation between the iERM area and each studied coloured area in RTM. The most significant correlation was between iERM and the red area (440–480 μm; r=0.87, p<0.0001).Conclusion The iERM-related retinal folds are clearly distinguishable on the HD-OCT. The red area in RTM representing the 440–480 μm retinal thickness can be a reliable predictor of the extent and the shape of the iERM. ER -