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Intraocular pressure (IOP) through 12 and 24 months of follow-up. (a) Mean values presented. (b) Box and whisker plot: box represents interquartile range (25th to 75th percentile); dot represents mean; horizontal line represents median (50th percentile); upper and lower vertical lines represent 95th and 5th percentiles, respectively. POAG = primary open angle glaucoma; PEX = pseudoexfoliation glaucoma; NTG = normal tension glaucoma; OH = ocular hypertension
