IOP, intraocular pressure; , number of eyes enrolled; Phaco., phacoemulsification; OAG, open-angle glaucoma. The numerical value listed under “medication reduction” represents the decrease in mean number of IOP lowering medications used postoperatively. 1Prospective studies. 2Retrospective studies. 3No statically significant difference was found at the end of follow-up. 4Percentage of reduction was not available in abstract (epub ahead of printing). 5Number of medications was reduced by 8% in the phacoemulsification alone group, 27% when using one iStent, and 45% when using 2 iStents.