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The percentage of eyes that had IOP fluctuations <3 mm Hg in the SLT group versus the travoprost group at pretreatment and posttreatment during the diurnal and the nocturnal period. (A) POAG patients. (B) NTG patients. IOP = intraocular pressure, NTG = normal tension glaucoma, POAG = primary open angle glaucoma, SLT = selective laser trabeculoplasty. P values were obtained by the independent samples t test.
