Fig. 2From: PRESERFLO MicroShunt implantation versus trabeculectomy for primary open-angle glaucoma: a two-year follow-up studyDevelopment of the mean number of necessary IOP-lowering medication over the course of two years after TE or PF implantation. IOP, intraocular pressure; TE, trabeculectomy; PF, PRESERFLOBack to article page