Knowledge is Power: What is a 20/20/20 Rule?
To prevent eye fatigue, you should stand up and look 20 feet away for 20 seconds every 20 minutes (a.k.a. the 20/20/20 rule).
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To prevent eye fatigue, you should stand up and look 20 feet away for 20 seconds every 20 minutes (a.k.a. the 20/20/20 rule).