Excisional goniotomy vs trabecular microbypass stent implantation: a prospective randomized clinical trial in eyes with mild to moderate open-angle glaucoma.

Purpose: To compare reduction in intraocular pressure (IOP) and IOP-lowering medication in eyes undergoing excisional goniotomy with Kahook Dual Blade (KDB) vs iStent microbypass implantation, both combined with phacoemulsification, in eyes with mild to moderate open-angle glaucoma (OAG).

Setting: Nine practices in the United States.

Design: Prospective, randomized, active-controlled, parallel-group clinical trial.