The "20-20-20 규칙" is a guideline designed to reduce eye strain caused by prolonged screen time. According to this rule, every 20 minutes, you should take a break and look at something 20 feet away for at least 20 seconds. This practice helps relax the eye muscles and can prevent discomfort. This rule is especially important for people who spend long hours in front of digital devices like computers, tablets, and smartphones. By following the 20-20-20 규칙, you can maintain better eye health and improve your overall comfort while using screens.