Fig. 6

Central macular thickness (CMT) over time for recurrence and no recurrence groups. In the recurrence group, CMT (µm) improved significantly from 514.2 ± 132.9 preoperatively (pre) to 322.2 ± 78.5 at 1 month postoperatively (1 M), 317.1 ± 109.4 at 3 months (3 M), 319.3 ± 105.6 at 6 months (6 M), 320.7 ± 112.8 at 1 year (1Y), 285.3 ± 97.2 at 2 years (2Y), and 268.4 ± 75.3 at 3 years (3Y) postoperatively (Kruskal–Wallis test, P < 0.001; Dunn’s test, **P < 0.01). In the no recurrence group, CMT improved significantly from 510.4 ± 121.2 preoperatively to 289.7 ± 54.8 at 1 M postoperatively, 287.8 ± 88.2 at 3 M, 310.6 ± 103.8 at 6 M, 293.4 ± 83.4 at 1Y, 258.5 ± 65.0 at 2Y, and 263.8 ± 79.1 at 3Y postoperatively (Kruskal–Wallis test, P < 0.001; Dunn’s test, **P < 0.01).