This is a prospective, randomized control study of glaucomatous eye undergoing tube shunt implantation using a nonvalved implant for poorly controlled glaucoma of any type. Eyes scheduled to receive a nonvalved tube shunt implant will be randomized to receive either needle fenestration(s) or a suture wick using a single 10-0 vicryl anterior to the ligature. The operative quadrant will be imaged using anterior-segment optical coherence tomography at pre- and post-operative visits.