20-20-20 rule

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  • Every 20 minutes
  • Look at something 20 feet away (6 meters)
  • For at least 20 Seconds

The 20-20-20 rule is designed to be an easy to remember caution about doing too much near work and to give your eyes a break from eye strain regularly. This rule is supported by both conventional optometry[1][2] and the EM method, although the EM method suggests that 20 seconds be five minutes.[3]

In some countries, this may be known as the 10-10-10 rule which is similar, but goes as follows:

  • Every 10 minutes
  • Look at something 10 meters away
  • For at least 10 seconds

  1. "American Optometric Association 20-20-20 rule poster" (PDF). American Optometric Association. 2020-05-30. Retrieved 2020-05-30.
  2. Nall, Rachel (2020-05-30). "20-20-20 rule: How to prevent eye strain". www.medicalnewstoday.com. Retrieved 2020-05-30.
  3. Steiner, Jake. "Eye Strain Awareness: Prevent Pseudo Myopia - Endmyopia". endmyopia.org. Retrieved 2020-06-01.