Inclusion Criteria:  Diagnosis of Primary Open-Angle Glaucoma (POAG) or Secondary Pseudoexfoliative Glacoma (PEXG) or Secondary Pigmentary Glaucoma (PG)  Exclusion Criteria:  Any other type of glaucoma including, but not limited to: traumatic glaucoma, angle recession glaucoma, uveitic glaucoma, neovascular glaucoma, angle closure glaucoma (ACG) and glaucoma associated with vascular disorders