Fig. 5. Changes of foveal surface symmetry difference (FSSD) after epiretinal membrane surgery. Group Ⅰ includes patients who went vitrectomy only and group Ⅱ includes patient who went vitrectomy with sulfur hexafluoride (SF₆) tamponade. FSSD consistently increased after surgery in both groups. Two groups did not show significant differences of FSSD at baseline and during the follow-up period. *Significant differences compared with baseline within the group, Wilcoxon Signed Rank test.

J Retin 2020;5:113-21 https://doi.org/10.21561/jor.2020.5.2.113

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