Purpose: Epiretinal membranes (ERMs) are a disorder leading to progressive vision loss and metamorphopsia. The gold standard in therapy is vitrectomy with membrane peeling. The aim of this study was to assess whether the use of intraoperative optical coherence tomography (iOCT), which allows tomographic visualization of the membrane during peeling, enables peeling without staining. Methods: This prospective study included 30 eyes of 30 patients with idiopathic ERMs scheduled for surgery. Pars plana vitrectomy with iOCT was performed in all cases, whereas staining of ERMs was only performed if needed. Internal limiting membrane (ILM) peeling was performed in case of wrinkled retinal surface after peeling of ERMs. Results: In 63% (n = 19) eyes the ERM could be peeled successfully without use of staining. Nevertheless, in 89% (n = 17) of patients having had ERM peeling without dye, staining of the ILM was performed afterwards for peeling the ILM. Best corrected visual acuity improved in 80% (n = 24) and remained unchanged in 7% (n = 2) 3 months after surgery. There were no significant differences in postoperative results between patients with and without staining for ERM peeling. Conclusions: Use of iOCT helps to complete ERM peeling in a majority of cases without use of a chromovitrectomy dye, but as iOCT fails to visualize the ILM, chromovitrectomy still facilitates macular surgery in a majority of cases.

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