Body & HealthFact
Against myopia: less screen helps – and more sky.
In East Asia around 80–90 % of young adults are short-sighted, in Europe about 30–40 %. Studies show children who spend more than two hours a day outdoors become myopic less often – regardless of what they do there. Bright daylight (10,000+ lux) appears to slow the eyeball's elongation.
Useful: A day outdoors is something different for the eyes than a day by the window.
Source: en.wikipedia.org