To rest your eyes when using screens, apply the 20-20-20 rule: every 20 minutes, take a 20-second break to look at a point at least 20 meters (or 20 feet) away, and take advantage of this time to blink to hydrate them.

noli's read

This advice is based on the '20-20-20' rule, a recommendation widely supported by organizations like the American Academy of Ophthalmology to counter digital eye strain. Research confirms that this fatigue is not caused by the intrinsic toxicity of screens, but by overexertion of the ciliary muscle and a drastic decrease in blinking (up to 70% less while in front of a screen). Looking into the distance allows the eyes to relax their accommodation, while deliberate blinking helps restore the tear film to limit dry eye. While the creator mentions that screens 'damage' the eyes, the current scientific consensus clearly distinguishes between reversible fatigue (related to habits) and lasting pathological damage (such as AMD), for which evidence of a direct link with screens remains debated or insufficient. It is therefore more accurate to speak of visual comfort than protection against irreversible degradation.

the sources

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