This efficacy and safety study will evaluate LUMIGAN® RC/ LUMIGAN® .01 (bimatoprost 0.01%) alone compared to TRAVATAN Z® (travoprost 0.004%) and TIMOLOL MALEATE-EX, 0.5%/TIMOLOL GFS 0.5% (timolol 0.5% ophthalmic gel forming solution) in patients who require IOP lowering therapy.