4 ms·
I've heard the rule that it should be like at least 20 seconds every 20 minutes or so. Of course, it's all just heuristics, though.
by jolmg 7y ago
I've heard the rule that it should be like at least 20 seconds every 20 minutes or so. Of course, it's all just heuristics, though.
- lern_too_spel 7y agoNone of these eye exercises have any benefit for myopia prevention. They might reduce eyestrain, but that is not related to the article.
- soared 7y agoThe rule is every 20 minutes look 20 feet away for 20 seconds. They say to keep 20/20, follow 20/20/20.