Safety/Efficacy Study: OPA-6566 Ophthalmic Solution in Subjects With Primary Open-Angle Glaucoma or Ocular Hypertension

OPA-6566, 2 dosing schedules (one drop once per day for 2 weeks and twice per day for 2 weeks)

Placebo, 2 dosing schedules (one drop once per day for 2 weeks and twice per day for 2 weeks)

Latanoprost (one drop once per day for 4 weeks)