Non-intraocular pressure-related revision surgeries after Ahmed glaucoma valve (AGV) implantation in refractory glaucoma.

AGV implantation has early and late tube-related complications necessitating revisional surgical interventions; which makes it important to have extended follow-up period for patients with AGV implants. Revisional interventions for AGV implants with tube-related complications are efficient procedures for the majority of patients, but recurrence may occur requiring additional revisions.