Science, Nature and Tech

Can Too Much Screen Time Damage Your Eyes?


I bet you’ve heard some adults warn that too much screen time can damage your eyes. Some even say that sitting too close to a screen can be harmful. This is an idea that’s been around for decades but is there any truth to it? In the latest of our Fact or Fable series, Sam investigates.

Interestingly, there was at one point evidence that watching TV could damage your health. In the 1960s a company called General Electric sold some brand new colour televisions – until then television had been in black and white. Unfortunately these particular televisions were faulty, and gave off far more radiation than was safe. The company recalled and repaired all the faulty sets but until they could fix them the advice was to sit a metre or more away from the televisions and not to watch for more than an hour. This idea seems to have stuck around and many people today believe that sitting too close to a screen or looking at a screen for too long can be hazardous to your health.

In fact, using screens doesn’t cause any permanent health problems. Too much screen time can cause headaches and eye strain, but these will go once you stop. If you’re using screens for any length of time though it’s wise to refocus your eyes every 10-15 minutes. You can do this by looking away from the screen and staring at the most distant object you can see; this will help prevent eye strain. If you find that you have to sit close to a screen to see it properly, mention it to an adult as you might need to have an eye test.


Cartoon by Clay Bennett 

Even though you now know that watching TV or using screens won’t hurt you… don’t show this to your parents with the demand that you be allowed to play Minecraft all day! A balance of screen time and other activities is definitely more healthy than sitting in front of a computer or TV all day, but the idea that too much screen time damages your eyes is …




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Sam has worked as a forensic scientist as well as for the British government, and has degrees in both archaeology and osteoarchaeology. She has 2 children, is passionate about science, reading, history and music, and loves dyeing her hair bright colours!

Sam blogs about all kinds of science at
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