The findings confirm that people should try and take breaks from their screens. Professor Wolffsohn says: âWe are planning to conduct longer term studies to see whether we can teach eyelid muscle memory impulses to blink more often during digital viewing, to help mitigate this chronic issue without long term use of reminders.â Researchers noted that after the study, the participantsâ eye symptoms returned to what they had been before the intervention. We saw a consequent improvement in the symptoms of the group as a whole.â Professor James Wolffsohn, Professor of Optometry at Aston University, who led the research in collaboration with the University of Valencia, Spain, said: âThe one previous study merely asked people to carry out the suggestions but here the access control on the software meant we could be sure that participants really had looked away every 20 minutes. Results showed a marked  decrease in symptoms including dryness, sensitivity and discomfort. Participantsâ digital eye strain symptoms were measured before and after two weeks of using the reminders, and one week after completing the study. 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.I develop Twenty Timer on Node v10.16.3.To run Twenty Timer locally, you must have the following installed: View the complete list of dependencies in package.json. expo/react-native/archive/sdk-34.0.0.tar.gz Written with React Native Testing Library, run with Jest.Three-screen navigation handled using React Navigation.Ī complete test suite of unittests and integration tests. Works using a combination of useEffect, useRef and useState.Code highlights include:Ī custom, functional, entirely hook-based timer countdown component. Twenty Timer is built in React Native and Expo, using TypeScript. Option to disable phone alerts and run timers automatically.Run this app to run automatic 20-minute/20-second intervals and Prolonged screen use, optometrists recommend what is termed the 20-20-20 rule -įor every 20 minutes spent looking at a screen, look at something 20 feetĪway for 20 seconds. Twenty Timer is a mobile app for timing 20-minute/20-second intervals. Twenty Timer is published on Expo - download it now! Unfortunately, it appears the Expo SDK version used in this project is no longer supported by Expo.io, so please note that my published app is not currently working.Ī minimilast 20-minute/20-second eye care timer for mobile.
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