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Corneal epithelial thinning profile induced by long-term wear of hydrogel lenses

Purpose. To characterize the epithelial thickness profile and study the effects of long-term wear of hydrogel lenses on this profile. Methods. A cross-sectional study was designed. Epithelial thickness was evaluated in 15 subjects who had worn one of two types of low oxygen transmissibility (Dk) hydrogel contact lenses for an average of 10 years (range, 7-16) and compared with a group of 18 control subjects who...