Fig. 1.

Mean IOP at each study visit in eyes without prior interventional glaucoma therapy (n = 45) and eyes with prior interventional glaucoma therapy (n = 103). Error bars indicate SD for the mean. Within each group, the mean IOP was significantly reduced from baseline at any visit during the follow-up period (p = 0.000; Wilcoxon test). Preoperatively, significant differences were observed between both groups (p = 0.01; t test), while at each visit after gel stent implantation no significant differences were observed between groups regarding mean IOP (p > 0.374; t test)