From the American Academy of Ophthalmology

This prospective case series evaluated the effect of implanting two or three micro-bypass stents at the time of cataract surgery in 47 patients with open-angle glaucoma. At one year, mean IOP was significantly lower than preop at 14.3 mmHg, with 77 percent of eyes achieving target IOP. The mean number of medications dropped from 2.7 to 0.7 (P < 0.001), with the three-stent group using significantly fewer medications than the two-stent group (0.4 vs. 1.0). Compared with studies of a single stent, multiple stents resulted in a greater propensity to achieve an IOP of 15 mm Hg or less and a greater absolute reduction in medications. Journal of Cataract & Refractive Surgery, November 2012