Evaluate Efficacy and Safety of PA5108 Ocular Implants in Primary Open Angle Glaucoma or Ocular Hypertension

Key Inclusion Criteria: * Ability to provide informed consent and follow study instructions * 18 years of age or older * Diagnosis of open-angle glaucoma or ocular hypertension in both eyes * Qualifying IOPs across 2 visits following washout of IOP-lowering medication, if applicable * Qualifying best-corrected visual acuity BCVA using Early Treatment Diabetic Retinopathy Study (ETDRS) chart in study eye * Qualifying corneal endothelial cell density (CEDC) in the study eye Key Exclusion Criteria: * Pseudoexfoliation or pigment dispersion, narrow irido-corneal drainage angles, or existing peripheral anterior synechiae in the inferior angle either eye. * Advanced or severe glaucoma * Disqualifying central corneal thickness in either eye * Significant other ocular conditions that could prevent accurate assessment of IOP and corneal health * Uncontrolled medical conditions * Have previously received, any injectable glaucoma medication into the anterior chamber of the study eye * Have received intravitreal injections in the study eye within the last 3 months of the Screening Visit and anticipated need for an intravitreal injection during the course of the study * Unwilling or unable to discontinue, in either eye, soft contact lens wear at least 2 days and hard contact lens wear 1 week before scheduled study visits and on implant administration days