Fig. 3

Different preoperative morphological aspects in 2 cases of idiopathic epiretinal membrane (ERM) using multimodal imaging. In case 1 (a–d), the arciform blue edge of the ERM (arrow) is clearly visible intraoperatively after staining (a), and corresponds to the edge identified on preoperative OCT B-scan (b) and En Face OCT (c) images (arrow) where it limits the plaque-like aspect of the ERM. The BR image (d) shows the ERM limits but the edges are less visible. In case 2 (e–h), the limits of the ERM are not clearly identified on the intraoperative image after staining (e). En Face OCT (g) and BR (h) images show a uniform retinal folding and a discrete reflectivity of the ERM (arrowhead) and provide a more accurate visualization of the ERM limits compared to the uniformly blue intraoperative staining (e). The OCT B-scan image (f) shows a thin ERM (arrow)