
Glasses. Chances are better than 50% that you, dear reader, rely on something to correct your refractive error (near- or far-sightedness) like contacts, prescription glasses, or readers. You may even have a few pairs stashed in your car, office, or workshop. But in low- and middle-income countries, refractive error is the leading cause of vision impairment in both kids and adults, and glasses aren’t so accessible.
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