Evaluating the Efficacy of Fenestrations in Tube Shunt Implants During the Early Postoperative Period

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.

Inclusion Criteria:

- 18 years of age or older

- Eyes that have poorly controlled glaucoma requiring a tube shunt implantation

- Willingness to participate in the study and sign informed consent

Exclusion Criteria:

- Concurrent surgery except phaco/intraocular lens

- Any abnormality preventing reliable applanation tonometry

- Eyes with exposure limitation (tight lids, deep orbits) that would make performing
the anterior segment optical coherence tomography difficult