A Retrospective Comparison of Ahmed Glaucoma Valve Implants with or without Ologen Collagen Matrix.

Purpose: To study the effects of Ologen collagen matrix on the outcomes of the Ahmed glaucoma valve implant.

Study Design: Retrospective case-control multicenter study, conducted at four centers, comparing the 6-month outcomes of Ahmed valve implants with or without Ologen.

Participants: The study included 125 eyes in a 4:1 pairing (25 patients with Ologen matched to 100 patients without Ologen).