Chronic Far-UVC (222nm) Light Exposure of SKH-1 Hairless Mice Does Not Cause Detectable Eye Pathology or Visual Deficits.

IF 2 4区 医学 Q3 OPHTHALMOLOGY
Current Eye Research Pub Date : 2025-10-01 Epub Date: 2025-08-03 DOI:10.1080/02713683.2025.2524564
Peter C Arden, Maria J Talayero Schettino, Matthew D Ramey, David Welch, Nabil A Mahmoud, Imke T Folkerts, David J Brenner, Norman J Kleiman
{"title":"Chronic Far-UVC (222nm) Light Exposure of SKH-1 Hairless Mice Does Not Cause Detectable Eye Pathology or Visual Deficits.","authors":"Peter C Arden, Maria J Talayero Schettino, Matthew D Ramey, David Welch, Nabil A Mahmoud, Imke T Folkerts, David J Brenner, Norman J Kleiman","doi":"10.1080/02713683.2025.2524564","DOIUrl":null,"url":null,"abstract":"<p><strong>Purpose: </strong>Far-UVC light (200-235 nm) is a new antimicrobial technology proposed for use in occupied spaces. In contrast to conventional germicidal UV light (254 nm), theoretical considerations and emerging safety data suggest that the decreased penetration depth of shorter wavelength far-UVC light causes less damage to vulnerable eye and skin tissue. This study examined the ocular effects of chronic far-UVC exposure in hairless, immune-competent SKH-1 mice after long-term exposure.</p><p><strong>Methods: </strong>Over 66 weeks, five days/week, eight hours/day, 48 each male and female mice were exposed to high (400 mJ/cm<sup>2</sup>), medium (130 mJ/cm<sup>2</sup>), low (55 mJ/cm<sup>2</sup>), or no (0 mJ/cm<sup>2</sup>) far-UVC (222 nm) light. Visual acuity and contrast sensitivity was determined using optokinetic methods, slit lamp examinations were made of the anterior segment, and intraocular pressure was determined. Analysis of corneal images quantified the extent of corneal neovascularization.</p><p><strong>Results: </strong>No significant differences in visual acuity, contrast sensitivity, intraocular pressure, or corneal neovascularization were observed between unirradiated animals and exposure groups. All groups, including unexposed controls, exhibited some degree of corneal neovascularization. Male mice had significantly lower visual acuity and contrast sensitivity than females. Stratified by gender, there was no exposure condition-based difference in contrast sensitivity. These findings were consistent whether each animal's eyes were averaged. or if all eyes were assessed individually.</p><p><strong>Conclusion: </strong>There was no relationship between far-UVC dose and visual acuity, contrast sensitivity, ocular pressure, or corneal neovascularization. Female mice had significantly higher visual acuity and contrast sensitivity. No ocular pathologies were observed, even at 400 mJ/cm<sup>2</sup>, substantially above the recently enacted ACGIH safety threshold of 160 mJ/cm<sup>2</sup> for 222 nm ocular exposures. More sensitive or detailed corneal examinations, longer daily exposures, or higher far-UVC doses, may be useful to define thresholds for human eye safety.</p>","PeriodicalId":10782,"journal":{"name":"Current Eye Research","volume":" ","pages":"1064-1071"},"PeriodicalIF":2.0000,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Current Eye Research","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1080/02713683.2025.2524564","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/8/3 0:00:00","PubModel":"Epub","JCR":"Q3","JCRName":"OPHTHALMOLOGY","Score":null,"Total":0}
引用次数: 0

Abstract

Purpose: Far-UVC light (200-235 nm) is a new antimicrobial technology proposed for use in occupied spaces. In contrast to conventional germicidal UV light (254 nm), theoretical considerations and emerging safety data suggest that the decreased penetration depth of shorter wavelength far-UVC light causes less damage to vulnerable eye and skin tissue. This study examined the ocular effects of chronic far-UVC exposure in hairless, immune-competent SKH-1 mice after long-term exposure.

Methods: Over 66 weeks, five days/week, eight hours/day, 48 each male and female mice were exposed to high (400 mJ/cm2), medium (130 mJ/cm2), low (55 mJ/cm2), or no (0 mJ/cm2) far-UVC (222 nm) light. Visual acuity and contrast sensitivity was determined using optokinetic methods, slit lamp examinations were made of the anterior segment, and intraocular pressure was determined. Analysis of corneal images quantified the extent of corneal neovascularization.

Results: No significant differences in visual acuity, contrast sensitivity, intraocular pressure, or corneal neovascularization were observed between unirradiated animals and exposure groups. All groups, including unexposed controls, exhibited some degree of corneal neovascularization. Male mice had significantly lower visual acuity and contrast sensitivity than females. Stratified by gender, there was no exposure condition-based difference in contrast sensitivity. These findings were consistent whether each animal's eyes were averaged. or if all eyes were assessed individually.

Conclusion: There was no relationship between far-UVC dose and visual acuity, contrast sensitivity, ocular pressure, or corneal neovascularization. Female mice had significantly higher visual acuity and contrast sensitivity. No ocular pathologies were observed, even at 400 mJ/cm2, substantially above the recently enacted ACGIH safety threshold of 160 mJ/cm2 for 222 nm ocular exposures. More sensitive or detailed corneal examinations, longer daily exposures, or higher far-UVC doses, may be useful to define thresholds for human eye safety.

慢性远紫外线(222nm)光照射SKH-1无毛小鼠不会引起可检测的眼部病理或视力缺陷。
目的:远紫外线光(200-235 nm)是一种新的抗菌技术,可用于室内环境。与传统的杀菌紫外线(254 nm)相比,理论考虑和新出现的安全性数据表明,波长较短的远紫外线穿透深度较低,对脆弱的眼睛和皮肤组织的伤害较小。本研究检测了长期暴露于无毛、免疫能力的SKH-1小鼠的慢性远紫外线暴露对眼部的影响。方法:采用高(400 mJ/cm2)、中(130 mJ/cm2)、低(55 mJ/cm2)、无(0 mJ/cm2)远紫外线(222 nm)光照射法,连续66周,5天/周,8小时/天,雄性和雌性小鼠各48只。采用光动力学方法测定视力和对比敏感度,用裂隙灯检查前段,测定眼压。对角膜图像的分析量化了角膜新生血管的程度。结果:未照射组和暴露组在视力、对比敏感度、眼压和角膜新生血管方面均无显著差异。所有组,包括未暴露的对照组,都表现出一定程度的角膜新生血管。雄性小鼠的视力和对比敏感度明显低于雌性小鼠。按性别分层,对比敏感度没有暴露条件的差异。无论每只动物的眼睛是否平均,这些发现都是一致的。或者所有的眼睛都被单独评估。结论:远紫外线剂量与视力、对比敏感度、眼压、角膜新生血管无明显关系。雌性小鼠的视觉敏锐度和对比敏感度明显高于雌性小鼠。即使在400 mJ/cm2下,也没有观察到眼部病变,大大高于最近颁布的ACGIH安全阈值,即222 nm眼部暴露160 mJ/cm2。更敏感或详细的角膜检查,更长的每日暴露时间,或更高的远紫外线剂量,可能有助于确定人眼安全阈值。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
Current Eye Research
Current Eye Research 医学-眼科学
CiteScore
4.60
自引率
0.00%
发文量
163
审稿时长
12 months
期刊介绍: The principal aim of Current Eye Research is to provide rapid publication of full papers, short communications and mini-reviews, all high quality. Current Eye Research publishes articles encompassing all the areas of eye research. Subject areas include the following: clinical research, anatomy, physiology, biophysics, biochemistry, pharmacology, developmental biology, microbiology and immunology.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信