Study Assessing the Safety and Efficacy of DE-117 Ophthalmic Solution Once Daily and Twice Daily in Subjects With Primary Open-Angle Glaucoma SPECTRUM 6

This is a randomized, double-masked, parallel-group, multi-center study. Subjects diagnosed with POAG or OHT who meet eligibility criteria at Visit 1 (Screening) will wash out their current topical IOP lowering medication(s), if any. After completing the required washout period, subjects will return for Visit 2 (Baseline, Day 1). Subjects who meet all eligibility criteria at Visit 2 (Baseline, Day 1) will be randomized to receive study medication for up to 6 weeks. Approximately 100 subjects with POAG or OHT will be randomized in a 1:1 ratio to either: * DE-117 ophthalmic solution 0.002% QD (Once Daily) * DE-117 ophthalmic solution 0.002% BID (Twice Daily) This study will consist of a screening period of up to 35 days including a washout period of up to 28 days (+ 7 days window), and a 6-week double-masked treatment period.