JAMA Ophthalmol: The risk of infection with the new crown is greatly reduced in people with myopia.

Recently, Wei Yi Equal, a second affiliated hospital of Nanchang University, published an article entitled: Association of Daily Wear of Eyeglasses With Susceptibility to Coronavirus Disease 2019 Application in jamA sub-journal JAMA.
As the chief physician of the Respiratory and Critical Care Medicine Department, Wei Yiping on February 8th supported The Zengdu Hospital in Hubei Province, Wei Yiping found that the proportion of new crown inpatients who wear glasses for long periods of time every day is much lower than that of the general population.
is there between wearing glasses on a daily basis and susceptible to neo-crown pneumonia? The team surveyed all 276 new crown patients hospitalized between January 27 and March 13, 2020, with only 5.8 percent wearing glasses per day, well below the 31.5 percent of the local population who wore glasses.
these data show that people with glasses are less likely to develop neo-crown pneumonia every day, suggesting that the eye may be an important route of infection, so more attention should be paid to preventive measures, such as washing hands frequently and avoiding touching the eyes.
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team collected information on all 276 new crown patients in Hubei province, including exposure history, clinical symptoms, underlying diseases, vision conditions and glasses wearing time.
The average age of the 276 patients who wore glasses each day was 51 years, and only 16 (5.8 percent) were wearing glasses for more than eight hours a day, none of them wearing contact lenses or had retrance surgery, all because of myopia.
To compare this with the general population, the team looked at a 1987 survey that showed a 31.5 percent myopia rate among students aged 7-22 in Hubei province, who would be 42-57 years old in 2020, close to the 51-year-old middle age of 276 new crown patients in the city.
these results suggest that people who wear glasses every day are less likely to develop new coronary pneumonia.
statistics show that normal people can not help but touch the eyes about 10 times an hour.
And the lack of protection on the surface of the eye, studies have also confirmed that the eye retina high expression of the new coronavirus subject ACE2 protein, there have been cases of infection through the eye new coronavirus, therefore, the eye is considered to be an important channel for the new coronavirus into the human body.
the authors speculate that wearing glasses prevents or prevents the wearer from touching the eye with his or her hand, thus preventing the virus from spreading from hand to eye.
many people pay attention to wearing masks and isolation, but neglect to wash their hands frequently and avoid touching the eyes with their hands, this study suggests the importance of washing their hands often and avoiding touching the eyes with their hands.
limitations of the study, the authors say the study has some obvious limitations.
, this is a single-center study with a small sample size.
number of patients who wear glasses for long periods of time, which limits the ability to extend this result to a larger population, and therefore needs to be validated through a large sample of multi-center studies.
, the proportion of myopia rates is based on 1987 literature data, not on current local populations.
third, previous literature has found that myopia rates include a small number of nears sighted patients who do not wear glasses, and this study lacks information about these people, which in part affects the integrity and effectiveness of the data.
, none of the study participants wore contact lenses, so the relationship between wearing contact lenses and new crown sensitivity remains to be studied.
further research is needed to clarify the specific reasons why wearing glasses reduces sensitivity to COVID-19.
expert review, JAMA Ophthalmology, published a commentary from Lisa Maragakis of the Johns Hopkins University School of Medicine at the same time.
Lisa Maragakis points out that from an epidemiological point of view, this is an observational study that draws correlation conclusions and does not necessarily imply a causal relationship between wearing glasses and low infection rates in the new crown.
and there are a number of limitations to this study data, the results of this study must be treated with caution.
An important reference data in this study, myopia rates in the general population, comes from earlier studies, which covered samples that did not exactly match those admitted to hospital for neocyclyc pneumonia, nor did they guarantee that all people with nearsory vision in the general population would wear glasses every day.
But Lisa Maragakis also said the study was instructive and raised the possibility that eye protection might have some degree of protective effect, but more retrospective and forward-looking studies were needed to confirm the relevance observed in the study and determine whether wearing glasses in public places or other forms of eye protection in addition to wearing masks and isolation could reduce the risk of new crown infections.
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