Difference between revisions of 20-20-20 rule
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==One more thing== | ==One more thing== | ||
The most commonly asked question about the 20-20-20 rule is: | The most commonly asked question about the 20-20-20 rule is: “Do I need to switch back to [[normalized]] every time I shift focus, for a break?” | ||
The answer is: whatever you wish. However, it would make your life easier if you kept the [[focal plane]] you are already using, be it [[differentials]] or nothing depending on where you are in your journey, for breaks under 5 minutes. If you are taking a much recommended longer break; this is a good time to switch to [[normalized]], in order to ensure you are not trading close up strain for excessive blur strain. | The answer is: whatever you wish. However, it would make your life easier if you kept the [[focal plane]] you are already using, be it [[differentials]] or nothing depending on where you are in your journey, for breaks under 5 minutes. If you are taking a much recommended longer break; this is a good time to switch to [[normalized]], in order to ensure you are not trading close up strain for excessive blur strain. | ||
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He also recommends to have 1 hour break after every 3 hours of close-up. | He also recommends to have 1 hour break after every 3 hours of close-up. | ||
But these are not strict rules. Generally what matters if you get ciliary spasm during your close-up or not. The best way to make sure is to check a Snellen chart or some | But these are not strict rules. Generally what matters if you get ciliary spasm during your close-up or not. The best way to make sure is to check a Snellen chart or some ‘landmark’ before you do close-up. You should be able to maintain the same acuity during close-up. If you detect blur on the same Snellen chart / landmark, then you should take a break. | ||
Edit: to avoid misunderstandings, the 20/20/20 doesn’t do any harm, but on it’s own is not enough to prevent or eliminate ciliary spasm.|halmadavid}} | Edit: to avoid misunderstandings, the 20/20/20 doesn’t do any harm, but on it’s own is not enough to prevent or eliminate ciliary spasm.|halmadavid}} | ||
{{quote|At EM we like to talk about | {{quote|At EM we like to talk about ‘pseudomyopia’ or whatever but the real danger is getting pseudoADHD induced by 20-20-20, as in you're actively choosing to train yourself to have a short attention span. “The rapid turnover of context.” Check out [https://podcastnotes.org/huberman-lab/episode-37-adhd-how-anyone-can-improve-their-focus-huberman-lab/ Huberman Lab Podcast #37] At the 2:09:16 mark|AznDudeIsOn}} | ||
==References== | ==References== | ||