Difference between revisions of Frequently Asked Questions/Differentials

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==What are differentials?==

~~See~~ [[~~differentials~~]].

Differentials are glasses for [[close up]]. They are not used as the primary stimulus to improve eyesight, rather they help relieve eye strain and prevent [[hyperopic defocus]] when using [[screens]] up close for long periods of time.

They are essential in preventing [[axial elongation]] and the worsening of [[myopia]].

{{jake says|The differential prescription is a reduced prescription specifically for close-up use.

Using a full prescription meant to correct myopia at long distances while focused up-close, will lead to more lens-induced myopia. To reduce the eye strain and focal plane change associated with full prescription wear up-close, we use a prescription specifically for close-up.

For myopes <2 diopters: No glasses should be necessary for close-up.

For myopes >2 diopters: Often a reduction of 1 to 2 diopters makes sense for close-up. To determine the exact prescription one may use a test lens kit, or a visit to a rehab sympathetic optometrist, or extrapolate the correction need by using the centimeter calculator.

Rehab specific: Reduction of prescription to introduce an ergonomically comfortable blur horizon is well advised.}}

How to choose a differential prescription is [https://endmyopia.org/choose-reduced-glasses-prescription-differential-close-friendly-glasses/ here].

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 ==What are differentials?==
-See [[differentials]].
+{{main|Differentials}}
+Differentials are glasses for [[close up]]. They are not used as the primary stimulus to improve eyesight, rather they help relieve eye strain and prevent [[hyperopic defocus]] when using [[screens]] up close for long periods of time.
+They are essential in preventing [[axial elongation]] and the worsening of [[myopia]].
+{{jake says|The differential prescription is a reduced prescription specifically for close-up use.
+Using a full prescription meant to correct myopia at long distances while focused up-close, will lead to more lens-induced myopia.  To reduce the eye strain and focal plane change associated with full prescription wear up-close, we use a prescription specifically for close-up.
+For myopes <2 diopters:  No glasses should be necessary for close-up.
+For myopes >2 diopters:  Often a reduction of 1 to 2 diopters makes sense for close-up.  To determine the exact prescription one may use a test lens kit, or a visit to a rehab sympathetic optometrist, or extrapolate the correction need by using the centimeter calculator.
+Rehab specific:  Reduction of prescription to introduce an ergonomically comfortable blur horizon is well advised.}}
+How to choose a differential prescription is [https://endmyopia.org/choose-reduced-glasses-prescription-differential-close-friendly-glasses/ here].