When researchers in China were analyzing hospital data of patients with Covid-19, they noticed an odd trend: Very few of the sick patients regularly wore glasses.
In one hospital in Suizhou, China, 276 patients were admitted over a 47 day period, but only 16 patients — less than 6 percent — had myopia or nearsightedness that required them to wear glasses for more than eight hours a day. By comparison, more than 30 percent of similarly aged people in the region needed glasses for nearsightedness, earlier research had shown.
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