Unsurprisingly, longer screen time is a major risk factor for DES. It has been reported that people who used mobile phones and computers for more than 8 hours a day were 2 times more likely to experience DES-related symptoms than those who used screens for fewer than 8 hours a day. For this reason, occupations that require employees to spend extended periods time in front of digital screens, such as office workers, call centre operators, bank employees, and government officials, tend to experience higher rates of DES. Contact lens wearers and women also tend to be more susceptible to DES.
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