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20-20-20 Eye Break Timer

Reminds you every 20 minutes to look at something 20 feet away for 20 seconds to reduce eye strain.

Tested tool guide Tested browser tools Checked August 16, 2026

What 20-20-20 Eye Break Timer does and how it behaves

The 20-20-20 Eye Break Timer turns the three-part eye-rest rule into a repeating schedule: after 20 minutes of screen work, it cues a 20-second look at something 20 feet away. It prompts a change from sustained near focus, but it does not measure vision or confirm that discomfort has improved. The commonly missed point is that each number has a different role: 20 minutes is the work interval, 20 feet is the viewing distance, and 20 seconds is the break duration.

How the result is produced

1

Twenty-minute work intervals

Starting the timer establishes a 20-minute interval before the next eye-break cue. The schedule then repeats so that a longer screen session is divided by regular prompts. This differs from an ordinary 20-minute countdown because the resulting prompt belongs to the full 20-20-20 routine, which also specifies what to look at and for how long.

2

Twenty-second distance breaks

At each cue, look at an object about 20 feet away for 20 seconds. Twenty feet equals 6.096 metres, so approximately 6 metres is the practical metric equivalent. The tool supplies the timing prompt, while the user selects the distant object and changes focus. It cannot determine the target's distance, track gaze direction, or verify that the full break was completed.

Good uses

  • Keeping a recurring distance-focus cue available during a long coding, spreadsheet, writing, or design session when concentrated work makes breaks easy to forget.
  • Adding brief, regularly spaced eye breaks to online classes, research, or document review without manually calculating when each succeeding 20-minute interval ends.
  • Following the same 20-20-20 schedule during gaming or other sustained close screen work, while choosing a distant target that can be seen from the workstation.

Limits and checks

  • The 20-minute interval represents elapsed timer time, not a measurement of continuous screen exposure. Meetings, phone checks, conversations, and unscheduled pauses are not evaluated to decide whether an eye break is still needed.
  • The tool cannot measure whether an object is actually 20 feet away. In a short room, choosing the farthest visible object may approximate the intended change of focus, but the timer cannot label that distance as correct.
  • Finishing a cycle means only that the scheduled interval and break period elapsed. It is not evidence that eye strain decreased, and it provides no reading for visual acuity, blink rate, focus, dryness, or other symptoms.

Common questions

Can I use a target about six metres away?

Yes. Twenty feet is exactly 6.096 metres, so an object approximately 6 metres away is a close practical match. The distance is measured from you to the object, not from your eyes to the monitor. The timer cannot assess that distance, so selecting the target and judging its location remain the user's responsibility.

Does completing these breaks prevent digital eye strain?

No. The timer supports a commonly recommended break routine, but it does not diagnose, treat, or guarantee prevention of digital eye strain. Persistent discomfort, headaches, blurred vision, or other symptoms may have causes that additional timed breaks do not address. An eye-care professional can evaluate ongoing symptoms and provide advice based on the individual.

References and verification

The behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.

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