Patients of this study population was diagnosed with primary open-angle glaucoma or ocular hypertension in both eyes.Subjects were randomized into 0.0015 % Tafluprost group or 0.005 % Latanoprost group.Intraocular pressure ( IOP ) measurement by Goldmann applanation tonometer , slit-lamp microscopy , Gonioscopy , Fundascopy , Visual acuity test , Perimetry , Blood pressure and pulse rate , Subjective symptoms were compered between two groups at Week 0 , Week 2 and Week 4 .