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. 2021 Dec 13;11:23913. doi: 10.1038/s41598-021-03270-3

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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(A) Anterior segment optical coherence tomography (AS-OCT) cross-sectional images on the horizontal meridian at the center of the cornea, and (B) corneal imaging of axial curvature and corneal thickness measured using a rotating Scheimpflug camera after 4 weeks of surgery in the keratectomy-only and keratectomy with polyethylene glycol (PEG)-collagen hydrogel-treated group. AS-OCT revealed higher density (arrow), suggesting scarring at the center of the epithelial layer in the untreated keratectomy-subjected cornea than the keratectomy-subjected cornea treated with PEG-collagen, which showed high focal density area at the paracenter of the cornea. The regular anterior corneal surface and regular corneal thickness were increased in the keratectomy with PEG-collagen hydrogel-treated group compared with the keratectomy-only group.