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Real or MADE-up: Investigating Mask-Associated Dry Eye (MADE) as an emerging syndrome

Abstract

Mask-Associated Dry Eye (MADE) has emerged as a consequence of widespread face mask usage during the Covid-19 pandemic. This review critically assesses the available evidence. A comprehensive search on PUBMED and EMBASE was conducted to identify studies on MADE, which were then categorized based on their design. A total of 26 studies were critically appraised, with the majority exhibiting poor study design quality. Investigating the impact of mask use on ocular surface irritation faced challenges due to global mask mandates, pandemic-related behavioural changes, and a lack of validated methods to measure the response to mask wear. Among the 15 studies, 12 reported a statistically significant reduction in TBUT associated with mask wear; however, the median decrease of 1.3 s was considered clinically insignificant. Results from Schirmer’s test in 8 studies varied, with 5 studies reporting a decrease, contradicting the hypothesis of misdirected airflow. Out of 7 studies on corneal and conjunctival staining, 6 indicated a worsening associated with mask wear. Five studies investigating OSDI scores reported an increase following mask wear, but 3 studies repeated the survey too soon. Limited evidence suggests that masks may cause mild ocular surface irritation, but the quality and certainty of this evidence remain low. Methodological limitations were prevalent across the majority of studies, and the observed changes were minimal. Therefore, it is unlikely that significant ocular surface pathology will develop in the majority of mask wearers. Currently, there is insufficient data to support the establishment of a new syndrome.

摘要

口罩相关干眼症 (MADE) 是新冠肺炎大流行期间广泛使用口罩的后果。本综述批判性地评估了现有证据。

通过对PUBMED和EMBASE数据库的全面检索来确定对MADE的研究, 并根据其设计对其进行分类。

本研究共评估了26项研究, 其中大多数研究设计质量较差。由于全球佩戴口罩的要求、与疫情相关的行为改变以及缺乏有效方法测量佩戴口罩反应, 调查口罩使用对眼表刺激的影响面临挑战。在15项研究中, 12项报告显示与佩戴口罩相关的TBUT在统计学上减少; 然而, 中位数减少1.3秒在临床上是微不足道的。Schirmer在8项研究中试验的结果各不相同, 其中5项研究报告的结果与气流误导的假设相矛盾。在7项角膜和结膜染色的研究中, 6项显示了与佩戴口罩相关眼病的恶化。五项调查疫情后OSDI评分的研究报告称, 佩戴口罩后OSDI评分有所上升, 但有三项研究过早地重复了这项调查。

有限的证据表明, 口罩可能会引起轻微的眼表刺激, 但这一证据的质量和确定性仍然很低。在大多数研究中普遍存在方法学的局限性, 且观察到的变化微乎其微。因此, 大多数戴口罩的人不太可能出现明显的眼表病变。目前, 还没有足够的数据来支持一种新的综合征的命名。

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Fig. 1: Tear Break Up Times (TBUT) in ‘Mask On’ vs. ‘Mask Off’ Groups.
Fig. 2: Schirmer’s Test Results in ‘Mask On’ vs. ‘Mask Off’ Groups.
Fig. 3: Ocular Surface Disease Index (OSDI) Survey Results in ‘Mask On’ vs. ‘Mask Off’ Groups.

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Acknowledgements

The authors would like to thank Mr Scott Hau for his expert opinion on in vivo confocal microscopy and immune cytology techniques.

Funding

Professor Bhuphendra Patel is supported in part by an Unrestricted Grant from Research to Prevent Blindness, Inc., New York, NY, to the Department of Ophthalmology & Visual Sciences, University of Utah. Mr Eoin O’ Sullivan has received honoraria from Roche and UCB. These are not associated with this work. No other sources of funding.

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RM was responsible for the conceptualisation of the study. EOS and BP contributed to the design of the study. MT was responsible for the data collection, analysis, quality assessment, writing and drafting. RM, EOS and BP were responsible for the ongoing editing, review, analysis and approval of the final manuscript of the paper.

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Correspondence to Michelle Ai Ling Teo.

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Synopsis

This paper reviewed 26 studies on Mask-Associated Dry Eye (MADE) and concluded that although there is some evidence suggesting that masks may cause mild ocular surface irritation, the overall quality and certainty of this evidence is low.

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Teo, M.A.L., Sullivan, E.O., Patel, B.C.K. et al. Real or MADE-up: Investigating Mask-Associated Dry Eye (MADE) as an emerging syndrome. Eye 38, 1091–1096 (2024). https://doi.org/10.1038/s41433-023-02847-8

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