20-20-20 Rule for Eye Strain

What is 20-20-20 Rule for Eye Strain?

A simple evidence-based protocol to prevent digital eye strain (computer vision syndrome): every 20 minutes, look at something 20 feet away for at least 20 seconds. This relaxes the ciliary muscles that focus your lens for near work, reduces eye fatigue, dryness, and headaches. Endorsed by the American Academy of Ophthalmology.

Is there evidence for it?

How do you do 20-20-20 Rule for Eye Strain?

1. 1.Set a recurring 20-minute timer during all screen work sessions. Use a dedicated app (EyeCare 20 20 20, Breaks For Eyes) or a simple repeating phone timer. Some people prefer a small hourglass on their desk as a visual cue
2. 2.When the timer fires, immediately shift focus to an object at least 20 feet (6 meters) away — a tree outside the window, a building across the street, a clock on a far wall. Hold your gaze for a full 20 seconds (count slowly to 20). Blink deliberately 5-10 times during this break to re-moisturize eyes
3. 3.Enhance the break with a quick body reset: roll your shoulders back, stretch your neck side to side, stand up if seated. The 20-second eye break becomes a micro-movement break that also addresses posture degradation from screen work
4. 4.Optimize your screen environment to reduce baseline strain: position monitor at arm's length, top of screen at eye level, reduce screen brightness to match ambient room lighting, increase text size 10-20% beyond default, enable night mode/blue light filter after sunset
5. 5.Track compliance for 2 weeks using a simple tally sheet (mark each break taken). Most people notice reduced end-of-day eye fatigue and headaches within the first week. After 2 weeks, the habit often becomes automatic without a timer

How long does it take?

20 seconds every 20 minutes during screen use.

Is it hard to start?

easy.

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