Difference between revisions of 20-20-20 rule
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→Do you need the 20-20-20 rule?: halmadavid on the 20-20-20 rule per https://community.endmyopia.org/t/what-i-wish-i-had-known-3-years-ago/9675/26
(→Do you need the 20-20-20 rule?: halmadavid on the 20-20-20 rule per https://community.endmyopia.org/t/what-i-wish-i-had-known-3-years-ago/9675/26) |
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{{quote|20202020202020202020000 rule is really just mainstream articles filtering into here. When you get distance vision your ciliary unlocks anyway. Whether [[ciliary spasm]] shuts off axial gains is debatable, light rays still converge in front of eye in theory. Try without 202020 rule and see if you still make the gains.<ref>https://community.endmyopia.org/t/ok-but-when-exactly/16092/2</ref>|NottNott}} | {{quote|20202020202020202020000 rule is really just mainstream articles filtering into here. When you get distance vision your ciliary unlocks anyway. Whether [[ciliary spasm]] shuts off axial gains is debatable, light rays still converge in front of eye in theory. Try without 202020 rule and see if you still make the gains.<ref>https://community.endmyopia.org/t/ok-but-when-exactly/16092/2</ref>|NottNott}} | ||
{{quote|It was never an Endmyopia rule, it’s a mainstream optometrists / work ergonomics recommendation. | |||
Jake generally recommends longer breaks. He says that a break needs to be at least 10-15 minutes to be really effective. | |||
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 “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}} | |||
==References== | ==References== | ||