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

Obaid Kousha, Paul O'Mahoney, Robert Hammond, Kenneth Wood, Ewan Eadie (Lead / Corresponding author)

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)
93 Downloads (Pure)

Abstract

Far-UVC, from filtered Krypton-Chloride lamps, is promising for reducing airborne transmission of disease. While 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 postexposure 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 mJ cm −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.

Original languageEnglish
Pages (from-to)137-145
Number of pages9
JournalPhotochemistry and Photobiology
Volume100
Issue number1
Early online date8 Apr 2023
DOIs
Publication statusPublished - Jan 2024

Keywords

  • 222 nm
  • eye
  • Far-UVC
  • Krypton-Chloride

ASJC Scopus subject areas

  • Radiation
  • Biochemistry
  • Physical and Theoretical Chemistry

Fingerprint

Dive into the research topics of '222 nm Far-UVC from filtered krypton-chloride excimer lamps does not cause eye irritation when deployed in a simulated office environment'. Together they form a unique fingerprint.

Cite this