Fig. 4

Density of hyperreflective dots in filtering blebs. The hyperreflective dot density of the three groups at postoperative 2 weeks (2 W), 1 month (1 M), 3 months (3 M), 6 months (6 M), 12 months (12 M), 18 months (18 M), 24 months (24 M). P < 0.05 was considered as statistically significant. Statistically significant between Phaco-ExPRESS vs. Phaco-Trab group, Phaco-Trab vs. Trab group, and Phaco-ExPRESS vs. Trab group were marked as †, ‡, and §, respectively. The Phaco-ExPRESS group showed decreased in hyperreflective dot count from postoperative 6 months to 12 months, while the Phaco-Trab group did not show decreased in hyperreflective dot until 12 months postoperatively. The Trab group showed no significant differences in hyperreflective dot count among different time points. For comparison between the three groups, the Phaco-Trab group showed higher hyperreflective dot count than the Trab group from 2 weeks to 12 months postoperatively. The Phaco-ExPRESS group showed less hyperreflective dot count than the Phaco-Trab group from 3 months to 12 months postoperatively