Inclusion Criteria:  Treated with OMNI® Surgical System as a standalone procedure in pseudophakic eye with mild to moderate primary open angle glaucoma at least 150 days prior to enrollment.  Exclusion Criteria:  Systemic disease that, in the opinion of the Investigator, would put the subject's health at risk and/or prevent completion of required study visits. Ocular pathology which, in the Investigator's judgment, would either place the subject at increased risk of complications or contraindicate washout, place the subject at risk of significant vision loss during the study period or interfere with compliance to elements of the study protocol (e.g., returning to Investigator's office for follow-up visits).