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However, the elderly, a high-risk population, may require additional, targeted educational measures to increase face-covering adherence.Purpose There has been an enormous increase in the use of gadgets for online classes and entertainment during the COVID-19 pandemic. This study aimed to estimate the prevalence of digital eye strain (DES), describe the pattern of gadget usage, and analyse the risk factors for DES.Methods This online survey analysed 941 responses from students of online classes (688), teachers of online classes (45), an