This was a prospective, multicenter, randomized, parallel-arm, double masked, placebo vehicle (PV) controlled study conducted to evaluate the safety and IOP-lowering efficacy of OTX-TP, a sustained release drug product placed in the canaliculus of the eyelid in subjects with open-angle glaucoma or ocular hypertension. A total of up to 550 subjects (1100 eyes) with a clinical diagnosis of open-angle glaucoma or ocular hypertension in both eyes received either OTX-TP or PV to evaluate the safety and efficacy of OTX-TP.