Weber Annika, Hohberger Bettina, Bergua Antonio
Department of Ophthalmology, University of Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germany.
PLoS One. 2021 May 13;16(5):e0251201. doi: 10.1371/journal.pone.0251201. eCollection 2021.
Mouth-nose masks have been requested to prevent the transmission of severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2). The aim of the present study was to investigate, if wearing a mouth-nose mask impairs the visual field function in normals.
Thirty eyes of 30 subjects were recruited for the present study. White-on-white perimetry (OCTOPUS 900; 90°) was done and sensitivity was analysed in 14 defined test points (P1-P14, inferior visual field) under 3 different test conditions while the subjects were wearing a mouth-nose mask: (I) 1.5 cm under the lower eyelid, nose clip not used (position1.5cm_no_clip); (II) 1.5 cm under the lower eyelid, nose clip correctly positioned (position1.5cm_with_clip); (III) 0.5 cm under the lower eyelid, nose clip correctly positioned (position0.5cm_with_clip). All data were compared to sensitivity without wearing a mouth-nose mask (reference). Mean Δ was calculated, being the difference between the results of each test condition and reference, respectively.
Sensitivity was significantly different between position1.5cm_no_clip and reference at 10 test points (p<0.05). Sensitivity at test point P7 was significantly different between position1.5cm_with_clip and position0.5cm_with_clip compared to reference (p<0.001), respectively. Mean Δ increased while wearing a mask at P7: position1.5cm_with_clip (-8.3 dB ± 7.3 dB) < position0.5cm_with_clip (-11.3 dB ± 9.5 dB) < position1.5cm_no_clip (-20.1 dB ± 7.6 dB).
Visual field function was observed to be significantly impaired in the inferior-nasal sector while persons were wearing a mouth-nose mask, especially when the nose clip was not correctly used.
已要求使用口鼻面罩来预防严重急性呼吸综合征冠状病毒2（SARS-CoV-2）的传播。本研究的目的是调查佩戴口鼻面罩是否会损害正常人的视野功能。
本研究招募了30名受试者的30只眼睛。在受试者佩戴口鼻面罩的3种不同测试条件下，进行了白色视标视野检查（OCTOPUS 900；90°），并在14个定义的测试点（P1-P14，下视野）分析敏感度：（I）在下眼睑下方1.5厘米处，不使用鼻夹（位置1.5厘米_无鼻夹）；（II）在下眼睑下方1.5厘米处，鼻夹位置正确（位置1.5厘米_有鼻夹）；（III）在下眼睑下方0.5厘米处，鼻夹位置正确（位置0.5厘米_有鼻夹）。所有数据均与未佩戴口鼻面罩时的敏感度（对照）进行比较。计算平均差值（Mean Δ），即每种测试条件与对照结果之间的差异。
在10个测试点，位置1.5厘米_无鼻夹与对照之间的敏感度存在显著差异（p<0.05）。与对照相比，测试点P7处位置1.5厘米_有鼻夹和位置0.5厘米_有鼻夹之间的敏感度存在显著差异（p<0.001）。在P7佩戴口罩时平均差值增加：位置1.5厘米_有鼻夹（-8.3 dB±7.3 dB）<位置0.5厘米_有鼻夹（-11.3 dB±9.5 dB）<位置1.5厘米_无鼻夹（-20.1 dB±7.6 dB）。
观察到人们佩戴口鼻面罩时，下鼻侧视野功能显著受损，尤其是在鼻夹使用不正确时。
