Baerveldt 350 vs Ahmed ClearPath 250 for the Treatment of Glaucoma

Inclusion Criteria: * Significant uncontrolled glaucoma despite medical, laser or previous surgical therapy that requires tube shunt implantation as standard-of-care to stabilize the glaucoma and preserve vision. * Pseudophakia * Patients who are willing to participate and are able to understand and sign the study consent form. * Age ≥18 years. Exclusion Criteria: * Phakic eyes (no previous cataract surgery). * Aphakic eyes (status post previous cataract removal but without a lens implant). * Age \<18 years. * Women of child-bearing age. * Patients unable to comprehend and sign the study consent form. * Women who are pregnant.