Managing coexistent cataract and glaucoma with iStent

Abstract

The iStent is an intraocular implant that resides within Schlemm canal and allows for direct bypass of the trabecular meshwork by aqueous fluid. It is one of several procedures termed microinvasive glaucoma surgery. The prominence of microinvasive glaucoma surgery is growing because of its role in lowering intraocular pressure in mild to moderate glaucoma combined with its favorable safety profile. With transcleral glaucoma filtering surgery, there is an increased potential for significant complications including hypotony, suprachoroidal hemorrhage, and long-term risk of endophthalmitis. In comparison, the iStent minimizes this risk and has been shown to be similar to cataract surgery in terms of associated complications. As will be discussed, multiple publications have addressed both the safety and efficacy of the implant. This review additionally presents an overview of implantation technique as well as what to expect postoperatively. Looking forward, the second-generation models may ease implantation and the use of multiple stents may potentially play a role in more advanced disease.

Keywords: Schlemm canal; iStent; microinvasive glaucoma surgery; trabecular microbypass.