20 20 20 eye timer app5/31/2023 That can lead to dry, irritated, and tired eyes, but twenty seconds focusing elsewhere is long enough for the eyes to relax enough to reduce the strain. When staring at screens, this number decreases generally to half that rate or less. Humans normally blink around 15 times each minute. Itâs estimated that at least half of people using computers in their regular work have some form of digital eye strain, resulting in eye surface problems including irritation and dryness, or vision issues such as headaches or blurred vision. Now the 20-20-20 rule â taking a break of at least 20 seconds, every 20 minutes, to look at least 20 feet away - has been confirmed by scientists at Aston University to help ease some of the symptoms of prolonged computer use. Itâs long been recommended as a way of easing eye strain while working at a computer screen.
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