What is the 20-20-20 rule for screen time?

The 20-20-20 rule is a guideline designed to prevent digital eye strain and dry eye symptoms from extended screen time. This rule advises taking a 20-second break every 20 minutes to focus on an object 20 feet away. The purpose is to allow the eyes’ focusing system to relax and to promote blinking, which helps keep the eyes moist. Although widely recommended by eye care professionals, research suggests its primary benefit lies in reducing subjective symptoms like discomfort and dryness, rather than significantly improving binocular vision or objective dry eye signs in the short term.