The "20 rule" is a guideline for reducing eye strain and fatigue caused by prolonged screen time. It suggests taking a break every 20 minutes and looking at objects that are 20 feet away for 20 seconds. It can also be interpreted as sitting at least 20 feet away from the screen while playing video games or taking a 20-minute screen break every 2 hours. Additionally, looking away from the screen for two minutes each hour is recommended. These practices are aimed at giving the eyes a rest and reducing the potential negative effects of excessive screen use.
