Objective: To evaluate the outcomes of Ahmed glaucoma valve implantation for therapy of glaucoma after penetrating keratoplasty.

Methods: 17 Ahmed glaucoma valve implants were placed in 17 eyes with glaucoma after penetrating keratoplasty. The follow up was 1 year. V.A., IOP and index medication were observed before and 1 year after surgery.

Results: The mean preoperative IOP was 29.1 mmHg (+/-6.5) with average medication 2.65 +/- 0.5, 1 year after surgery the mean IOP decreased to 18.4 mmHg +/- 4.7 with 0.7 +/- 0.8 medication. The tube implant successfully controlled glaucoma in 13 eyes (73.5%) at 1 year. The corneal grafts remain clear in 11 eyes (64.7%).

Conclusions: Implantation of Ahmed glaucoma valve successfully controlled IOP in difficult cases of glaucoma after penetrating keratoplasty.