Objective: To describe a new approach for shortening silicone tubes of glaucoma drainage devices (GDDs).

Methods: A retrospective intervention case series describing 3 patients undergoing the same treatment at a single institutional center

Results: : Three patients underwent successful ab interno trimming of GDD silicone tubes without complication

Conclusions: : This technique allows for rapid and successful shortening of GDD tubes via an ab interno approach avoiding risks of traditional glaucoma tube trimming approaches.