Difference between revisions of 3 hour rule
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* Try not to exceed 3 hours of close-up time. | * Try not to exceed 3 hours of close-up time. | ||
If you do near work for 4 hours or more, it is likely you will have ciliary spasm and it may be more difficult to make improvements. | If you do near work for 4 hours or more continuously, it is likely you will have ciliary spasm that is harder to resolve and it may be more difficult to make improvements. | ||
==Videos== | ==Videos== | ||
{{#ev:youtube|kIuN9Jjxccg}} | {{#ev:youtube|kIuN9Jjxccg}} | ||
Revision as of 18:42, 9 February 2022
The 3 hour rule is a suggestion to keep a balance between near work and time spent using distance vision and reduce eye strain. This can be an effective alternative to the 20-20-20 rule.
- For every 3 hours of close-up time, try to get an hour of distance time.
- Try not to exceed 3 hours of close-up time.
If you do near work for 4 hours or more continuously, it is likely you will have ciliary spasm that is harder to resolve and it may be more difficult to make improvements.