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222 nm Far-UVC from filtered Krypton-Chloride excimer lamps does not cause eye irritation when deployed in a simulated office environment

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Kousha_2023_PP_222nmFar_UVC_CC.pdf (889.4Kb)
Date
27/04/2023
Author
Kousha, Obaid
O’Mahoney, Paul
Hammond, Robert
Wood, Kenneth
Eadie, Ewan
Funder
Science & Technology Facilities Council
Grant ID
N/A
Keywords
222 nm
Eye
Far-UVC
Krypton-Chloride
QC Physics
SDG 3 - Good Health and Well-being
MCP
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Abstract
Far-UVC, from filtered Krypton-Chloride lamps, is promising for reducing airborne transmission of disease. Whilst significant research has been undertaken to investigate skin safety of these lamps, less work has been undertaken on eye safety. There is limited data on human eye safety or discomfort from the deployment of this germicidal technology. In this pilot study, immediate and delayed eye discomfort were assessed in a simulated office environment with deployment of Krypton-Chloride lamps, located on the ceiling and directed downwards into the occupied room. Discomfort was assessed immediately post-exposure and several days after exposure using validated, Standard Patient Evaluation Eye Dryness (SPEED) and Ocular Surface Disease Index (OSDI) questionnaires. Our results show no significant eye discomfort or adverse effects from the deployment of Far-UVC in this simulated office environment, even when lamps were operated continuously with participants receiving head exposures of up to 50 mJcm-2 . In addition, a statistically significant reduction in bacteria and fungi of 52% was observed. Far-UVC in this simulated office environment did not cause any clinically significant eye discomfort and was effective at reducing pathogens in the room. These results contribute an important step to further investigation of the interaction of Far-UVC with the human eye.
Citation
Kousha , O , O’Mahoney , P , Hammond , R , Wood , K & Eadie , E 2023 , ' 222 nm Far-UVC from filtered Krypton-Chloride excimer lamps does not cause eye irritation when deployed in a simulated office environment ' , Photochemistry and Photobiology , vol. Early View . https://doi.org/10.1111/php.13805
Publication
Photochemistry and Photobiology
Status
Peer reviewed
DOI
https://doi.org/10.1111/php.13805
ISSN
0031-8655
Type
Journal article
Rights
Copyright © 2023 The Authors. Photochemistry and Photobiology published by Wiley Periodicals LLC on behalf of American Society for Photobiology. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Description
This work was funded by the Science and Technology Facilities Council (STFC) Impact Accelerator Account (IAA) at the University of St Andrews.
Collections
  • University of St Andrews Research
URI
http://hdl.handle.net/10023/27472

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