Overview Screen time is a big issue these days. You probably spend a good number of hours looking at screens, like your computer at work and at home, your smartphone, television, or other digital devices. Looking at screens too much can lead to eye strain. But the 20-20-20 rule may help. Keep reading to learn more about this eye exercise, how to do it, and whether or not research says it’s effective. What’s the 20-20-20 rule? If you find yourself gazing at screens all day, your eye doctor may have mentioned this rule to you. Basically, every 20 minutes spent using a screen, you should try to look away at something that is 20 feet away from you for a total of 20 seconds. How can you tell if something is 20 feet away? Unless you have a tape measure you probably won’t be able to accurately measure 20 feet. Being exact isn’t the key. You should just try to focus on something far away from you. Consider looking out a window at an object that seems far away, like a tree or a building acros