Imaging of glaucoma drainage devices.

Previously reserved for patients with refractory glaucoma, glaucoma drainage devices (GDDs) are being used more frequently as a primary treatment option. Several types of GDDs are currently manufactured, only one of which is radiopaque. Knowledge of their typical imaging appearance in addition to pertinent background information is therefore vital for radiologists. We present a case of bilateral glaucoma drainage devices and briefly review the surgical aspect of implantation.