Timing of Glaucoma Drainage Device With Boston Keratoprosthesis

The Boston KPro, purchased from Massachusetts Eye and Ear infirmary (Boston, MA), is implanted using the usual standard technique.

The GDD that will be used is the Ahmed implant (New World Medical, Rancho Cucamonga, CA). The Ahmed implant will be implanted using the standard technique either at the time of KPro surgery in group 1, or 6 months following KPro in group 2.