Difference between revisions of Reduced distance glasses
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Normalized are | '''Reduced distance glasses''' (or ''reds'' or ''normalized'') are the '''primary [[stimulus]]''' to improve eyesight using [[distance vision]]. | ||
Normalized lenses reduce the [[blur horizon]] by just enough to give good stimulus from [[blur]] and [[double vision]] challenge, but definitely not enough to make the world significantly [[blur]]ry. Good normalized lenses allow the user to continue daily activities without impairment, except night time driving, for which [[20/20 correction|a higher correction]] is a very good choice. (Always ensure your eyesight meets the minimum legal requirement while driving.) Normalized lenses induce a small amount of [[myopic defocus]], which has been shown to reduce axial length in a clinical study.<ref>{{Cite journal |last=Read |first=Scott A. |last2=Collins |first2=Michael J. |last3=Sander |first3=Beata P. |date=December 2010 |title=Human Optical Axial Length and Defocus |url=https://iovs.arvojournals.org/article.aspx?articleid=2126435 |journal=Investigative Ophthalmology & Visual Science}}</ref> | |||
== How much is a good distance reduction? == | |||
=== New recommendation === | |||
Normalized should be slightly (0.25 or 0.5 D) reduced from a [[20/20 correction]], unless you are near the end of a reduction or trying to clear [[blur adaptation]], in which case they are equivalent to [[20/20 correction]]. | |||
When you're starting out with the reduced glasses methodology, '''you will likely have a lot of [[ciliary spasm]] and eye strain'''. Lucky you! This means [[Explainer:Why early gains are so fast|your early rate of improvement will be staggeringly high]], before it slows and you enter the long game of much slower improvements. | |||
The golden rule with all of Red: [[Guide:Not reducing too quickly|don't reduce too quickly]]. It is recommended that you reduce no more than 0.25 diopters from [[20/20 correction]], or 0.5 D from full correction. This gives plenty of good stimulus and blur challenge for the majority of moderate myopes. If your myopia is higher (7 diopter+) or you need more challenge for stimulus, you may consider doing a 0.5 D reduction (0.75 D from full correction). But in general '''there are no benefits to reducing more quickly''', and most of the time reducing too quickly will lead to problems than faster progress. Take your time! | |||
=== Old recommendation === | |||
According to older EM articles, if you undercorrect more, you use more [[active focus]], get more [[stimulus]], and improve faster. However, with huge undercorrection, some people run into [[blur adaptation]] and don't improve at all. It is therefore important to test what works for you. | |||
Specifically, the old 20/50 rule<ref>https://endmyopia.org/2050-the-brilliant-super-simple-rule-for-improving-eyesight/</ref> says to reduce until you can get 20/50 with AF in natural light but indoors. This can result in a 2 D undercorrection, which might not work for everyone. | |||
== Reducing == | |||
: ''See also:'' [[Guide:Reducing normalized]] | |||
Generally, reduce by 0.25 D. The best way to introduce a normalized reduction is with a "[[zero diopter reset]]". | |||
== Timing == | |||
Jake recommends starting with [[differentials]], and using normalized 4–6 weeks later after starting differentials.<ref>{{cite jake|https://endmyopia.org/pro-topic-differential-now-normalized-in-4-6-weeks/|Pro Topic: Differential Now, Normalized In 4-6 Weeks}}</ref> There may be a fair amount of over correction to remove, your measurements through the 4-6 weeks of differentials use should help you to determine if you need more that the 0.25 reduction (up to 0.50 for high myopia). High myopes will generally get more accurate measurements by using differentials to measure with and accounting for the difference. In general, never reduce more than 1 diopter for your first pair of normalized, from the correction you were using before starting the [[reduced lens method]]. In the early stages of vision improvement, your goal will be to find [[Active Focus]], and correcting your distance vision habits so that you can get the stimulus you need to improve your eyesight. | |||
== When do I wear reduced == | |||
Reduced glasses are your normal glasses when applying the reduced glasses methodology. You wear them all the time. Typically for anything that's more than two feet away from you. | |||
"What if I just need to use my phone for like a minute?" CHANGE YOUR GLASSES. If you are asking yourself "should I switch to differential glasses for closeup?" the answer is always YES. | |||
==='''Q:''' What if someone SEES me?=== | |||
'''A:''' It's just a new pair of glasses, they probably don't care. (How much do ''you'' care when you see someone else wearing a new pair of glasses?) | |||
'''Q:''' ... but high schoolers care about everything, they will notice!!! | |||
'''A:''' Sure, that's fine! Just tell them something short and truthful, and don't make it a big deal (unless you want to). If it's not a big deal to you, it won't be a big deal for them, either. | |||
=== [[Pseudomyopia]] === | |||
If you have [[pseudomyopia]], do you need to wear normalized glasses? Probably not! Only wear normalized glasses when you need them to be able to see things. | |||
==See also== | |||
* [[Differentials#When are differentials worn|When are differentials worn]] | |||
* [[Guide:Reducing_normalized | Reducing normalized]] | |||
== References == | |||
{{reflist}} | |||
[[Category:Articles]] | |||
[[Category:Lens selections]] | |||
Latest revision as of 15:35, 11 August 2023
Reduced distance glasses (or reds or normalized) are the primary stimulus to improve eyesight using distance vision.
Normalized lenses reduce the blur horizon by just enough to give good stimulus from blur and double vision challenge, but definitely not enough to make the world significantly blurry. Good normalized lenses allow the user to continue daily activities without impairment, except night time driving, for which a higher correction is a very good choice. (Always ensure your eyesight meets the minimum legal requirement while driving.) Normalized lenses induce a small amount of myopic defocus, which has been shown to reduce axial length in a clinical study.[1]
How much is a good distance reduction?
New recommendation
Normalized should be slightly (0.25 or 0.5 D) reduced from a 20/20 correction, unless you are near the end of a reduction or trying to clear blur adaptation, in which case they are equivalent to 20/20 correction.
When you're starting out with the reduced glasses methodology, you will likely have a lot of ciliary spasm and eye strain. Lucky you! This means your early rate of improvement will be staggeringly high, before it slows and you enter the long game of much slower improvements.
The golden rule with all of Red: don't reduce too quickly. It is recommended that you reduce no more than 0.25 diopters from 20/20 correction, or 0.5 D from full correction. This gives plenty of good stimulus and blur challenge for the majority of moderate myopes. If your myopia is higher (7 diopter+) or you need more challenge for stimulus, you may consider doing a 0.5 D reduction (0.75 D from full correction). But in general there are no benefits to reducing more quickly, and most of the time reducing too quickly will lead to problems than faster progress. Take your time!
Old recommendation
According to older EM articles, if you undercorrect more, you use more active focus, get more stimulus, and improve faster. However, with huge undercorrection, some people run into blur adaptation and don't improve at all. It is therefore important to test what works for you.
Specifically, the old 20/50 rule[2] says to reduce until you can get 20/50 with AF in natural light but indoors. This can result in a 2 D undercorrection, which might not work for everyone.
Reducing
- See also: Guide:Reducing normalized
Generally, reduce by 0.25 D. The best way to introduce a normalized reduction is with a "zero diopter reset".
Timing
Jake recommends starting with differentials, and using normalized 4–6 weeks later after starting differentials.[3] There may be a fair amount of over correction to remove, your measurements through the 4-6 weeks of differentials use should help you to determine if you need more that the 0.25 reduction (up to 0.50 for high myopia). High myopes will generally get more accurate measurements by using differentials to measure with and accounting for the difference. In general, never reduce more than 1 diopter for your first pair of normalized, from the correction you were using before starting the reduced lens method. In the early stages of vision improvement, your goal will be to find Active Focus, and correcting your distance vision habits so that you can get the stimulus you need to improve your eyesight.
When do I wear reduced
Reduced glasses are your normal glasses when applying the reduced glasses methodology. You wear them all the time. Typically for anything that's more than two feet away from you.
"What if I just need to use my phone for like a minute?" CHANGE YOUR GLASSES. If you are asking yourself "should I switch to differential glasses for closeup?" the answer is always YES.
Q: What if someone SEES me?
A: It's just a new pair of glasses, they probably don't care. (How much do you care when you see someone else wearing a new pair of glasses?)
Q: ... but high schoolers care about everything, they will notice!!!
A: Sure, that's fine! Just tell them something short and truthful, and don't make it a big deal (unless you want to). If it's not a big deal to you, it won't be a big deal for them, either.
Pseudomyopia
If you have pseudomyopia, do you need to wear normalized glasses? Probably not! Only wear normalized glasses when you need them to be able to see things.
See also
References
- ↑ Read, Scott A.; Collins, Michael J.; Sander, Beata P. (December 2010). "Human Optical Axial Length and Defocus". Investigative Ophthalmology & Visual Science.
- ↑ https://endmyopia.org/2050-the-brilliant-super-simple-rule-for-improving-eyesight/
- ↑ The EndMyopia Blog, https://endmyopia.org/pro-topic-differential-now-normalized-in-4-6-weeks/