\ua9 by Ophthalmic Communications Society, Inc. Purpose:To measure the coronal and sagittal retinal displacement before and after surgery for epiretinal membranes in InfraRed horizontal foveal sections and optical coherence tomography scans and describe displacement tridimensionality, vision loss, and metamorphopsia.Methods:Retrospective series with greater than 6-month average follow-up before and after surgery. The record included best-corrected visual acuity, optical coherence tomography, M-charts, and InfraRed retinography. Overall, pre- and postoperative coronal and sagittal retinal displacement across the entire field, concentric circles at 0.5-, 1.5-, and 4.5-mm radii, and the central horizontal and vertical meridian were calculated as the optical flow of consecutive images.Results:This study comprised 10 patients (4 men, 6 women), with 22.7 \ub1 25.2 months follow-up before surgery and 16.2 \ub1 7.3 months after. Best-corrected visual acuity reduced before surgery (0.15 \ub1 0.67 logarithm of minimum angle of resolution to 0.38 \ub1 0.85 logarithm of minimum angle of resolution; P < 0.05) and increased afterward (0.086 \ub1 0.61 logarithm of minimum angle of resolution; P = 0.003). Preoperative coronal displacement was 30.1 \ub1 29.1 \ub5m versus 67.0 \ub1 23.4 \ub5m after (P = 0.002). Sagittal retinal displacement was 140.9 \ub1 84.6 \ub5m before surgery, 339.7 \ub1 172.5 \ub5m after (P = 0.017), and 357.6 \ub1 320.8 \ub5m across the entire follow-up. Preoperative best-corrected visual acuity decreases correlated with the foveal coronal displacement. Vertical metamorphopsia correlated with the average coronal displacement within a 4.5-mm radius. Pre- and postoperative sagittal displacement correlated with horizontal metamorphopsia (P = 0.006 and P = 0.026). Postoperative sagittal displacement correlated with postoperative best-corrected visual acuity (P = 0.026) and foveal thickness (P = 0.009).Conclusion:This study confirms that postoperative displacement is greater than preoperative and that sagittal displacement is greater than coronal and correlates with best-corrected visual acuity and metamorphopsia changes
