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Conventional and transepithelial corneal cross-linking for patients with keratoconus
Previous studies investigating the effectiveness of conventional corneal collagen cross-linking (CXL) and transepithelial CXL in keratoconus treatment have reported conflicting outcomes. Therefore, we conducted a meta-analysis to compare the effectiveness of these treatments. We searched MEDLINE, EM...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5886478/ https://www.ncbi.nlm.nih.gov/pubmed/29621306 http://dx.doi.org/10.1371/journal.pone.0195105 |
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author | Zhang, Xiaoyu Zhao, Jing Li, Meiyan Tian, Mi Shen, Yang Zhou, Xingtao |
author_facet | Zhang, Xiaoyu Zhao, Jing Li, Meiyan Tian, Mi Shen, Yang Zhou, Xingtao |
author_sort | Zhang, Xiaoyu |
collection | PubMed |
description | Previous studies investigating the effectiveness of conventional corneal collagen cross-linking (CXL) and transepithelial CXL in keratoconus treatment have reported conflicting outcomes. Therefore, we conducted a meta-analysis to compare the effectiveness of these treatments. We searched MEDLINE, EMBASE, and Cochrane Central Register of Controlled Trials for prospective randomized controlled trials (RCTs) with no restrictions. We included visual acuity (corrected distance visual acuity, uncorrected distance visual acuity) and corneal keratometry (K) as primary outcome parameters, and spherical equivalent, central corneal thickness (CCT), and endothelial cell density, as secondary parameters. We finally included seven reports (including six RCTs involving 305 participants and 344 eyes). Our analysis revealed significant postoperative differences in average K and CCT values between conventional and transepithelial CXL-treated patients [K: weighted mean difference (WMD) = 0.79, 95% confidence interval (CI) = 0.04–1.53, p = 0.04; CCT: WMD = 4.53, 95% CI = 0.42–8.64, p = 0.03]. In contrast, we did not find any significant differences in visual acuity, flattest K value, steepest K value, cylinder K value, apex K value, spherical equivalent, or endothelial cell density between groups. In conclusion, transepithelial CXL has a more protective influence on corneal thickness than conventional CXL, and results in lesser postoperative corneal flattening. Further investigation of the clinical outcomes of transepithelial CXL is required. |
format | Online Article Text |
id | pubmed-5886478 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-58864782018-04-20 Conventional and transepithelial corneal cross-linking for patients with keratoconus Zhang, Xiaoyu Zhao, Jing Li, Meiyan Tian, Mi Shen, Yang Zhou, Xingtao PLoS One Research Article Previous studies investigating the effectiveness of conventional corneal collagen cross-linking (CXL) and transepithelial CXL in keratoconus treatment have reported conflicting outcomes. Therefore, we conducted a meta-analysis to compare the effectiveness of these treatments. We searched MEDLINE, EMBASE, and Cochrane Central Register of Controlled Trials for prospective randomized controlled trials (RCTs) with no restrictions. We included visual acuity (corrected distance visual acuity, uncorrected distance visual acuity) and corneal keratometry (K) as primary outcome parameters, and spherical equivalent, central corneal thickness (CCT), and endothelial cell density, as secondary parameters. We finally included seven reports (including six RCTs involving 305 participants and 344 eyes). Our analysis revealed significant postoperative differences in average K and CCT values between conventional and transepithelial CXL-treated patients [K: weighted mean difference (WMD) = 0.79, 95% confidence interval (CI) = 0.04–1.53, p = 0.04; CCT: WMD = 4.53, 95% CI = 0.42–8.64, p = 0.03]. In contrast, we did not find any significant differences in visual acuity, flattest K value, steepest K value, cylinder K value, apex K value, spherical equivalent, or endothelial cell density between groups. In conclusion, transepithelial CXL has a more protective influence on corneal thickness than conventional CXL, and results in lesser postoperative corneal flattening. Further investigation of the clinical outcomes of transepithelial CXL is required. Public Library of Science 2018-04-05 /pmc/articles/PMC5886478/ /pubmed/29621306 http://dx.doi.org/10.1371/journal.pone.0195105 Text en © 2018 Zhang et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
spellingShingle | Research Article Zhang, Xiaoyu Zhao, Jing Li, Meiyan Tian, Mi Shen, Yang Zhou, Xingtao Conventional and transepithelial corneal cross-linking for patients with keratoconus |
title | Conventional and transepithelial corneal cross-linking for patients with keratoconus |
title_full | Conventional and transepithelial corneal cross-linking for patients with keratoconus |
title_fullStr | Conventional and transepithelial corneal cross-linking for patients with keratoconus |
title_full_unstemmed | Conventional and transepithelial corneal cross-linking for patients with keratoconus |
title_short | Conventional and transepithelial corneal cross-linking for patients with keratoconus |
title_sort | conventional and transepithelial corneal cross-linking for patients with keratoconus |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5886478/ https://www.ncbi.nlm.nih.gov/pubmed/29621306 http://dx.doi.org/10.1371/journal.pone.0195105 |
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