![]() ![]() The message couldnât be removed until the task was performed correctly, as measured by the app. Special software downloaded onto the participantsâ own laptop computers used the built-in laptop camera both to check if a user was sitting at the screen and to monitor their gaze direction every few seconds.Īfter 20 minutes of continuous screen viewing, the programme flashed up a message, asking users to rest for 20 seconds while looking at any distant target around 20 feet away, such as out of the window or across a room. Researchers at Aston Universityâs College of Health and Life Sciences set up their study with the help of 29 participants who suffer from symptoms of eye strain. This is the first time that the 20-20-20 guidance rule has been properly validated. 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. First time that guidance has been scientifically validated.Aston University researchers used special software to monitor participantsâ gaze for two weeks, measuring symptoms before and afterÂ.Scientists find that a short break to look away from screen every 20 minutes improves symptoms of eye strain for computer users. ![]()
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