20-20-20 Eye Strain Timer

The 20-20-20 rule is a simple yet science-backed eye care practice designed to combat digital eye strain. After every 20 minutes of screen time, you look at something at least 20 feet away for 20 seconds. This brief pause allows the ciliary muscles in your eyes — which constantly work to focus on nearby screens — to fully relax, significantly reducing discomfort from prolonged computer work.

Using this timer makes the 20-20-20 rule effortless. Start your work session, and the timer automatically counts down 20 minutes of work time followed by a 20-second break reminder. You can also enable browser notifications to receive a gentle alert when it's time to look away. The tool tracks how many breaks you've taken, helping you build a consistent eye-rest habit throughout your day.

This timer is ideal for anyone who spends hours at a desk—programmers, designers, remote workers, students, and office staff. While the rule cannot prevent permanent vision damage from screens, it effectively reduces uncomfortable symptoms like dryness, blurring, and eye fatigue that accumulate without breaks. For best results, combine the timer with other habits: keep your screen at arm's length, maintain good lighting, and blink consciously during work intervals.