20-20-20 Eye Rest Timer
Every 20 minutes, look at something 20 feet (6 m) away for 20 seconds. Keep this tab open while you work.
The 20-20-20 rule
The American Academy of Ophthalmology suggests taking regular breaks with the 20-20-20 rule: every 20 minutes, look at something at least 20 feet (about 6 m) away for at least 20 seconds.
| Hours with the timer on | Breaks | Time looking away |
|---|---|---|
| 1 h | 2 | 40 sec |
| 2 h | 5 | 1 min 40 sec |
| 4 h | 11 | 3 min 40 sec |
| 8 h | 23 | 7 min 40 sec |
Other tips from the AAO
- Blink on purpose: we normally blink about 15 times a minute but only 5 to 7 times while using screens.
- Sit about 25 inches (arm's length) from the screen and look slightly down at it.
- Match screen brightness to the room, use a matte filter for glare and artificial tears for dry eyes.
Eye strain does not cause permanent damage, according to the AAO. See an ophthalmologist if it continues after you adjust your workspace.
Sources
FAQ
What is the 20-20-20 rule?
Every 20 minutes, look at an object at least 20 feet away for at least 20 seconds. The American Academy of Ophthalmology recommends it for screen eye strain.
Does it work while I use other tabs?
Yes. Keep this tab open and the tone plays on time even while you work elsewhere.