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Main outcome measures were change in keratometry, uncorrected visual acuity (UCVA) and best-corrected visual acuity (BCVA). Nineteen patients in each group completed 1-year follow-up. Preoperatively, there were no inter-group differences for age, keratometry, corneal thickness and spherical equivalent (p\u2009&gt;\u20090.127). One year postoperatively, maximum and minimum keratometry were flattened by 1.6 diopters (p\u2009&lt;\u20090.023) and 2 diopters (p\u2009&lt;\u20090.047) respectively after conventional CXL, and, 0.47 diopters (p\u2009=\u20090.471) and 0.19 diopters (p\u2009=\u20090.120) respectively after accelerated CXL. Association analysis showed significant negative association between baseline maximum keratometry and change in maximum keratometry after accelerated CXL (p\u2009=\u20090.002) but not after conventional CXL (p\u2009=\u20090.110). Corneal thickness was reduced significantly in both groups (p\u2009=\u20090.017). An improvement in UCVA (p\u2009&lt;\u20090.001) and BCVA (p\u2009&lt;\u20090.022) was noted in both groups along with a reduction in spherical equivalent postoperatively (p\u2009&lt;\u20090.026). There were no inter-group differences for any of the parameters postoperatively (p\u2009&gt;\u20090.184). Although no statistically significant differences were observed between both treatment modalities, a more effective topographic flattening was observed with conventional CXL as compared to accelerated CXL in this study.<\/jats:p>","DOI":"10.1038\/srep14425","type":"journal-article","created":{"date-parts":[[2015,9,25]],"date-time":"2015-09-25T08:13:54Z","timestamp":1443168834000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":73,"title":["One-year outcomes of conventional and accelerated collagen crosslinking in progressive keratoconus"],"prefix":"10.1038","volume":"5","author":[{"given":"Vanissa W. 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