The 20-20-20 rule is a technique used to reduce eye strain caused by prolonged computer use. The rule states that every 20 minutes, you should take a 20-second break and look at something 20 feet away. The idea behind this technique is that it gives your eyes a chance to rest and refocus, which can help to reduce eye strain and fatigue.
The 20-20-20 rule is simple and easy to follow. You can set a reminder on your phone or computer to remind you to take a break every 20 minutes. During your break, you should look away from your computer screen and focus on an object that is at least 20 feet away. This can be a window, a picture on the wall, or anything else that is at a distance. The goal is to give your eyes a chance to relax and refocus, which can help to reduce eye strain.
It's also important to note that the 20-20-20 rule is not the only way to reduce eye strain, it's just one of the strategies that you can use. Other strategies include adjusting your monitor settings, taking frequent breaks, blinking frequently, using artificial tears, adjusting the lighting in your work area, using a computer screen filter, getting an eye exam, keeping your computer screen at a comfortable distance, using the right glasses and taking a nap.
In summary, the 20-20-20 rule is a technique used to reduce eye strain caused by prolonged computer use by taking a break every 20 minutes to look at something 20 feet away for 20 seconds. It's a simple and easy-to-follow strategy that can help to reduce eye strain and fatigue.