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COVID-19 risk reduced 5X by glasses, face shield, or mask – Sept 16, 2020

From a Sept study of eyeglasses and a June meta-analysis of 172 studies

80% reduction if just wear glasses (Chinese - worn for Myopia)
78% reduction if just wear face shield
85% reduction if just wear mask

Joint probability Calculation: Wear Glasses +Wear Mask = 97%

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Wraparound/Safety Glasses
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Face Shield in ConsumerLab Sept 2020
Face shield can also provide some protection for the eyes. A review of studies of coronavirus transmission found that the use of eye protection (face shields, visors or goggles) found that the use of eye protection was associated with 78% less infection than with no eye protection, with the researchers noting that "Eye protection is typically underconsidered and can be effective in community settings." (Chu, Lancet 2020).
In fact, even eyeglasses may provide some protection: A study of COVID-19 patients in a hospital in China found that only 16 of 276 patients (or 5.8%) wore glasses (i.e., at least 8 hours per day for near-sightedness) compared to an estimated 31.5% of the general population, suggesting that wearers of eyeglasses may be less susceptible to COVID-19. The eyes are considered an important channel for SARS-CoV-2 to enter the body (Zeng, JAMA Opthal 2020).

  • Physical distancing, face masks, and eye protection to prevent person-to-person transmission of SARS-CoV-2 and COVID-19: a systematic review and meta-analysis – Lancet June 2020  PDF in VitaminDWiki
  • Association of Daily Wear of Eyeglasses With Susceptibility to Coronavirus Disease 2019 Infection

See also web

  • Does Wearing Glasses Protect You From Coronavirus? NYT Sept 16
    • It may be that eyeglasses act as a partial barrier, protecting eyes from the splatter of a cough or sneeze.
    • Another explanation for the finding could be that people who wear glasses are less likely to rub their eyes with contaminated hands.



Created by admin. Last Modification: Monday September 21, 2020 00:57:57 GMT-0000 by admin. (Version 18)

Attached files

ID Name Comment Uploaded Size Downloads
14345 Glasses wraparound.jpg admin 21 Sep, 2020 00:01 18.35 Kb 78
14344 Glasses3.jpg admin 21 Sep, 2020 00:00 17.25 Kb 76
14343 Glasses2.jpg admin 20 Sep, 2020 23:59 6.15 Kb 75
14342 Glasses1.jpg admin 20 Sep, 2020 23:59 58.08 Kb 79
14341 Association of Daily Wear of Eyeglasses.pdf admin 20 Sep, 2020 21:07 125.42 Kb 23
14340 Physical distancing, face masks, and eye protection.pdf PDF 2020 admin 20 Sep, 2020 21:02 1,022.37 Kb 14
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