The purpose of this study is to assess the efficacy and safety of one iStent supra stent in the reduction of intraocular pressure associated with primary open-angle glaucoma.

The study assesses the efficacy and safety of one iStent supra stent in the reduction of intraocular pressure associated with primary open-angle glaucoma.

Inclusion Criteria:

• Diagnosed with primary open-angle glaucoma (POAG)
• Subjects on two topical hypotensive medications

Exclusion Criteria:

• Traumatic, uveitic, neovascular, or angle closure glaucoma
• Fellow eye already enrolled