Difference between revisions of Differentials
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[[File:Microsoft Cloud Event Dublin, upclose with graphs.jpg|thumb|Without ''diffs'', you're on the path to ever increasing prescriptions and will get nowhere with vision improvement :(]] | [[File:Microsoft Cloud Event Dublin, upclose with graphs.jpg|thumb|Without ''diffs'', you're on the path to ever increasing prescriptions and will get nowhere with vision improvement :(]] | ||
'''Differentials''' are reduced glasses for [[close-up|close up activity]]. They have a lower correction than your [[normalized]] lenses that allows you to see clearly only up to the screen. The difference between [[normalized]] and differential lenses is usually between 1 and 2 [[diopters]].<ref>{{cite jake|https://endmyopia.org/faq-items/what-is-the-differential-prescription/|What is the differential prescription?}}</ref><ref name=ChooseReduction>{{cite jake|https://endmyopia.org/choose-reduced-glasses-prescription-differential-close-friendly-glasses/|How To Choose A Reduced Glasses Prescription (Differential / Close-Up Friendly Glasses)}}</ref> | '''Differentials''' are reduced strength glasses for [[close-up|close up activity]]. They have a lower correction than your [[normalized]] lenses that allows you to see clearly only up to the screen. The difference between [[normalized]] and differential lenses is usually between 1 and 2 [[diopters]].<ref>{{cite jake|https://endmyopia.org/faq-items/what-is-the-differential-prescription/|What is the differential prescription?}}</ref><ref name=ChooseReduction>{{cite jake|https://endmyopia.org/choose-reduced-glasses-prescription-differential-close-friendly-glasses/|How To Choose A Reduced Glasses Prescription (Differential / Close-Up Friendly Glasses)}}</ref> | ||
People with myopia of -2 and lower do not typically need to wear differentials. | People with myopia of -2 and lower do not typically need to wear differentials. | ||
Revision as of 18:06, 11 June 2020
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Differentials are reduced strength glasses for close up activity. They have a lower correction than your normalized lenses that allows you to see clearly only up to the screen. The difference between normalized and differential lenses is usually between 1 and 2 diopters.[1][2]
People with myopia of -2 and lower do not typically need to wear differentials.
If you are wearing contact lenses, it is recommended to use plus lenses of a suitable power over the contacts as differential glasses.
Why are differentials worn?
The primary stimulus for axial elongation of the eyeball is hyperopic defocus, which occurs when someone:
- Is engaged in close-up activity
- Wears more correction than they need to when seeing the object that is close up.
Differentials allow the wearer to wear just what they need to, to see up close. This removes the stimulus of hyperopic defocus, and stops eyes from getting more myopic. In a sense, it's a quick fix. 
It's fairly easy to stop myopia from progressing, by just wearing differentials. The axial length of the eye does not randomly change by itself, it only changes in response to stimulus.
See also
References
- ↑ The EndMyopia Blog, https://endmyopia.org/faq-items/what-is-the-differential-prescription/
- ↑ The EndMyopia Blog, https://endmyopia.org/choose-reduced-glasses-prescription-differential-close-friendly-glasses/