Therefore, smartphone users should follow the 20/20/20 rule every time they use their phone. As a rule of thumb, you should minimize screen exposure by staring at a distance of 20 feet for at least 20 seconds after every 20 minutes of use. Another thing is that if you like to exercise, you can do short-term exercises for 20 seconds that will be good not only for your eyes but also for your body.

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