Review of the Xen Gel Stent and InnFocus MicroShunt.

PURPOSE OF REVIEW: Two new translimbal glaucoma devices (Xen Gel Stent and InnFocus MicroShunt) have been developed with the goal of optimizing the predictability and safety for subconjunctival glaucoma surgery.

RECENT FINDINGS: The new subconjunctival glaucoma implants are manufactured from nonsilicone, biocompatible materials, which may reduce the postoperative inflammatory and fibrotic reactions that can lead to failure. Early data suggests a favorable safety profile with significant reductions in intraocular pressure (IOP). The prevention of chronic hypotony has been a hallmark of the devices, which utilize an intrinsic flow-limiting design based on the tube length and internal lumen diameter.

SUMMARY: Early data with the XEN Gel Stent and InnFocus MicroShunt show promising results. Prospective comparative studies comparing these devices with tube shunt and trabeculectomy will be needed.