A group of researchers led by Masaki Tanito, professor and Kazunobu Sugihara, assistant professor in the Department of Ophthalmology in Shimane University's Faculty of Medicine and Ushio Inc. (Head office: Tokyo; President and Chief Executive Officer: Koji Naito, hereinafter "Ushio") observed and researched the safety of 222 nm Far UV-C on the eye and also conducted an experiment on its effect on the inactivation of microorganisms. No acute or chronic adverse effects impacting the eyes were found. The experiment researching microorganism inactivation,showed 90% bacterial inactivation of Staphylococcus aureus and 99% bacterial inactivation of φX174 phages. These results were published in Photochemistry and Photobiology on September 8, 2022.
Shimane University Faculty of Medicine Ophthalmology