Publication: Corneal topography and tomography readings with mask wear during the COVID-19 pandemic
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Issued Date
2023
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File Type
application/pdf
Rights Holder(s)
Scopus
Bibliographic Citation
Journal of Cataract and Refractive Surgery. Vol 49, No.3 (2023), p.285-291
Suggested Citation
Zein M., Wylegala A., Sripawadkul W., Al Bayyat G., Alvarez O.P., Gutierrez A.J., Guerrero M.A., Galor A., Karp C.L. Corneal topography and tomography readings with mask wear during the COVID-19 pandemic. Journal of Cataract and Refractive Surgery. Vol 49, No.3 (2023), p.285-291. doi:10.1097/j.jcrs.0000000000001090 Retrieved from: https://hdl.handle.net/20.500.14740/12535
Other Contributor(s)
Abstract
To assess the effect of mask wear on corneal topography and tomography readings.Setting:Tertiary ophthalmic center.Design:Prospective, observational, comparative study.Methods:Subjects underwent imaging with the Tomey TMS-4a topographer and the Oculus Pentacam HR tomographer. Imaging was performed without a mask, and then testing was repeated while wearing 3 different masks: Halyard Level 2, Halyard Level 3, and KN95. Measurements during mask wear were compared with measurements without a mask. The Kruskal-Wallis analysis of variance grouped test was used to compare mean differences without vs with mask wear on measurements. The Chi-square test was used to compare frequency of differences between different masks and against-the-rule vs with-the-rule astigmatism. The frequencies of clinically significant changes in axis of astigmatism, magnitude of astigmatism, and mean keratometry (K) values were calculated.Results:52 eyes were included in the study with a mean age of 34.71. Mask wear did not show statistically significant differences in mean topography and tomography measurements compared with without mask wear for all parameters. However, the majority, 53% (83/156) had a >10 degrees and 41% (64/156) had >15 degrees change in axis of astigmatism on topography when wearing a mask compared with no mask wear.Conclusions:Mask wear did not result in statistically significant mean changes in K readings on topography and tomography. However, the axis of astigmatism varied >10 degrees in most of the patients. Axis determination should be interpreted with caution regarding refractive surgery and/or toric intraocular lens planning in individuals whose measurements were obtained while wearing a mask. © 2023 Elsevier Inc.. All rights reserved.