ub.xmlui.mirage2.page-structure.muninLogoub.xmlui.mirage2.page-structure.openResearchArchiveLogo
    • EnglishEnglish
    • norsknorsk
  • Velg spraakEnglish 
    • EnglishEnglish
    • norsknorsk
  • Administration/UB
View Item 
  •   Home
  • Det helsevitenskapelige fakultet
  • Institutt for klinisk medisin
  • Artikler, rapporter og annet (klinisk medisin)
  • View Item
  •   Home
  • Det helsevitenskapelige fakultet
  • Institutt for klinisk medisin
  • Artikler, rapporter og annet (klinisk medisin)
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Intraoperative swept-source OCT–based corneal topography for measurement and analysis of stromal surface after epithelial removal

Permanent link
https://hdl.handle.net/10037/24507
DOI
https://doi.org/10.3928/1081597X-20210405-01
Thumbnail
View/Open
article.pdf (679.4Kb)
Accepted manuscript version (PDF)
Date
2021-07-01
Type
Journal article
Tidsskriftartikkel
Peer reviewed

Author
Zhou, Wen; Reinstein, Dan Z.; Archer, Timothy J.; Chen, Xiangjun; Utheim, Tor Paaske; Feng, Yue; Stojanovic, Aleksandar
Abstract

PURPOSE: To assess intraoperative stromal topography measurements using swept-source optical coherence tomography (OCT)–based topography/tomography after epithelial removal and to analyze the epithelial contribution to the corneal topography and optics.

METHODS: This was a prospective series of 22 eyes of 19 patients referred to receive phototherapeutic keratotomy (PTK) for treatment of recurrent corneal erosion and a control group of 22 virgin eyes. Swept-source OCT corneal topography/tomography was obtained immediately before and immediately after mechanical deepithelialization before PTK. Epithelial thickness maps were obtained before the surgery using spectral-domain OCT in the control group and as a reference in the group with anterior basement membrane dystrophy. Topographic and optical characteristics, including the curvature, astigmatism, asphericity, and higher order aberrations of the cornea before and after deepithelialization were compared, and their differences correlated with the measurements derived from the epithelial thickness maps.

RESULTS: Stromal topography measurements after deepithelialization were easily obtained and showed excellent repeatability. Assessment of corneal edema induced by deepithelialization revealed that it did not significantly affect the measured parameters. The stromal surface was steeper by 1.28 diopters, had higher with-the-rule astigmatism by 0.41 diopters, was more prolate, and had more higher order aberrations compared to the intact epithelialized corneal surface. These differences correlated well with the parameters derived from epithelial thickness maps.

CONCLUSIONS: Measurement of stromal topography using swept-source OCT immediately after mechanical deepithelialization may be a viable method in therapeutic refractive surgery, where stromal topography-guided ablation is needed. A significant epithelial contribution to anterior corneal topography and optics was confirmed.

Publisher
Slack
Citation
Zhou, Reinstein, Archer, Chen, Utheim, Feng, Stojanovic. Intraoperative swept-source OCT–based corneal topography for measurement and analysis of stromal surface after epithelial removal. Journal of refractive surgery. 2021;37(7):484-492
Metadata
Show full item record
Collections
  • Artikler, rapporter og annet (klinisk medisin) [1974]
Copyright 2021 The Author(s)

Browse

Browse all of MuninCommunities & CollectionsAuthor listTitlesBy Issue DateBrowse this CollectionAuthor listTitlesBy Issue Date
Login

Statistics

View Usage Statistics
UiT

Munin is powered by DSpace

UiT The Arctic University of Norway
The University Library
uit.no/ub - munin@ub.uit.no

Accessibility statement (Norwegian only)