Original StudyONE-YEAR OUTCOMES OF METAMORPHOPSIA AND RETINAL DISPLACEMENT AFTER EPIRETINAL MEMBRANE SURGERYWatanabe, Amaka MD*,†; Ishida, Masahiro MD, PhD*,‡; Shibata, Masaki MD*; Fujimoto, Taichi MD*; Mizushima, Akio MD, PhD†; Takeyama, Asuka MD, PhD*,‡; Imamura, Yutaka MD, PhD* Author Information *Department of Ophthalmology, Teikyo University School of Medicine, University Hospital Mizonokuchi, Kanagawa, Japan; †Department of Palliative Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan; and ‡Department of Ophthalmology, Toho University Ohashi Medical Center, Tokyo, Japan. Reprint requests: Yutaka Imamura, MD, Department of Ophthalmology, Teikyo University School of Medicine, University Hospital Mizonokuchi, 5-1-1 Futako Takatsuku, Kawasaki, Kanagawa 213-8507, Japan; e-mail: [email protected] The content of this paper was presented at Annual Meeting of Japanese Clinical Ophthalmology, Tokyo, Japan, October 16, 2020. None of the authors has any financial/conflicting interests to disclose. Retina: September 2022 - Volume 42 - Issue 9 - p 1756-1761 doi: 10.1097/IAE.0000000000003522 Buy Metrics AbstractIn Brief Associated Multimedia Purpose: To examine 1-year outcomes of metamorphopsia and tangential retinal displacement after epiretinal membrane surgery and identify predictors for metamorphopsia score at 1 year and its improvement from baseline. Methods: M-CHARTS were used to measure metamorphopsia. Distances between the intersections of two sets of retinal vessels were measured with infrared or autofluorescence images. Predictors for metamorphopsia scores at 1 year after surgery and their differences from baseline were identified with multivariate regression analysis. Results: Ninety-two eyes of 90 consecutive patients were included. The vertical and horizontal distances continued expanding for 1 year (P < 0.001). Both vertical and horizontal metamorphopsia scores improved 3 months after surgery (P = 0.025 and P < 0.001, respectively), and horizontal scores continued improving for a year. Horizontal metamorphopsia scores correlated with retinal displacement more strongly than vertical scores. Higher metamorphopsia score at baseline is predictive for that at 1 year. Older age and being male are predictive for less improvement of the score at 1 year from baseline. Conclusion: Metamorphopsia correlates with tangential retinal displacement at 1 year after epiretinal membrane surgery. Horizontal metamorphopsia scores keep improving until 1 year postoperatively. Being male and older age are both independent predictors for poor improvement of metamorphopsia after epiretinal membrane surgery. Retina continued to expand tangentially for 1 year after epiretinal membrane surgery, and its displacement correlated with metamorphopsia. Multiple regression analysis identified being male and old age as independent predictive factors for less improvement of metamorphopsia scores after the surgery.