Difference between revisions of Lens-induced myopia

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{{Under_construction}}
 
'''Lens-induced myopia''' is the generally accepted observation (by researchers, if not the mainstream optometry industry - citation needed) that wearing corrective lenses seems to somehow cause myopia to worsen. Typically when someone wears [[distance vision]] glasses for [[close-up]] use.
'''Lens-induced myopia''' is the researched phenomenon <ref>[https://scholar.google.com/scholar?hl=en&q=lens+induced+myopia Google Scholar list of Lens Induced Myopia studies]</ref> that wearing corrective lenses seems to cause myopia to worsen. Typically this occurs when lenses are either too [[overprescribed]], or when someone wears [[distance vision]] glasses for [[close-up]] use. This causes [[hyperopic defocus]], the mechanism likely to be the cause of lens-induced myopia.<ref name="Proteomic analysis of chick retina during early recovery from lens‑induced myopia">
{{Cite journal |last=Zhou |first=Yun Yun |last2=Chun |first2=Rachel Ka Man |last3=Wang |first3=Jian Chao |last4=Zuo |first4=Bing |last5=Li |first5=King Kit |last6=Lam |first6=Thomas Chuen |last7=Liu |first7=Quan |last8=To |first8=Chi-Ho |date=2018-05-03 |title=Proteomic analysis of chick retina during early recovery from lens‑induced myopia |url=http://www.spandidos-publications.com/10.3892/mmr.2018.8954/abstract |journal=Molecular Medicine Reports |volume=18 |issue=1 |pages=59–66 |doi=10.3892/mmr.2018.8954 |issn=1791-2997}}</ref>


The actual mechanism is still an area of active research, but the underlying cause appears to be [[axial elongation]]<ref>
The actual mechanism is still an area of active research, but the underlying cause appears to be [[axial elongation]]<ref>
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</ref>.
</ref>.


One of several hypotheses is that it is result of [[hyperopic defocus]].<ref name="Proteomic analysis of chick retina during early recovery from lens‑induced myopia">
It has been shown in studies that myopic defocus is protective against [[Myopia]] progression.<ref name="Long -term effects of optical defocus on eye growth and refractogenesis">
{{Cite journal |last=Zhou |first=Yun Yun |last2=Chun |first2=Rachel Ka Man |last3=Wang |first3=Jian Chao |last4=Zuo |first4=Bing |last5=Li |first5=King Kit |last6=Lam |first6=Thomas Chuen |last7=Liu |first7=Quan |last8=To |first8=Chi-Ho |date=2018-05-03 |title=Proteomic analysis of chick retina during early recovery from lens‑induced myopia |url=http://www.spandidos-publications.com/10.3892/mmr.2018.8954/abstract |journal=Molecular Medicine Reports |volume=18 |issue=1 |pages=59–66 |doi=10.3892/mmr.2018.8954 |issn=1791-2997}}</ref>
 
It has been shown in studies that myopic defocus is protective against myopia progression.<ref name="Long -term effects of optical defocus on eye growth and refractogenesis">
{{Cite journal |last=Tarutta |first=Elena |date=2016 |title=Long -term effects of optical defocus on eye growth and refractogenesis |url=https://www.pum.edu.pl/__data/assets/pdf_file/0007/112849/PomeranianJLifeSci_62-01_025-030.pdf |journal=Pomeranian J Life Sci |volume=62(1) |pages=25–30}}</ref>
{{Cite journal |last=Tarutta |first=Elena |date=2016 |title=Long -term effects of optical defocus on eye growth and refractogenesis |url=https://www.pum.edu.pl/__data/assets/pdf_file/0007/112849/PomeranianJLifeSci_62-01_025-030.pdf |journal=Pomeranian J Life Sci |volume=62(1) |pages=25–30}}</ref>


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==Near Work Induced Myopia==
==Near Work Induced Myopia==
It is arguable if near work induced myopia is the same mechanism as lens induced myopia.  Both are cases where you are doing work closer than your corrected vision is designed to do, but obviously near work induced myopia can happen before the first pair of glasses, and the term is more heavily associated with [[Pseudomyopia]].  Many optometrists recommend the [[20-20-20 rule]] to prevent eye strain,<ref name="American Optometric Association 20-20-20 rule poster">
This term is more heavily associated with [[Pseudomyopia]].  Many optometrists recommend the [[20-20-20 rule]] to prevent eye strain,<ref name="American Optometric Association 20-20-20 rule poster">
{{Cite web |title=American Optometric Association 20-20-20 rule poster |date=2020-05-30 |website=American Optometric Association |url=https://www.aoa.org/documents/infographics/SYVM2016Infographics.pdf |access-date=2020-05-30}}
{{Cite web |title=American Optometric Association 20-20-20 rule poster |date=2020-05-30 |website=American Optometric Association |url=https://www.aoa.org/documents/infographics/SYVM2016Infographics.pdf |access-date=2020-05-30}}
</ref><ref name="Medical News Today: Does the 20-20-20 rule prevent eye strain?">
</ref><ref name="Medical News Today: Does the 20-20-20 rule prevent eye strain?">
{{Cite web |title=20-20-20 rule: How to prevent eye strain |url=https://www.medicalnewstoday.com/articles/321536 |last=Nall |first=Rachel |date=2020-05-30 |website=www.medicalnewstoday.com |language=en |access-date=2020-05-30}}
{{Cite web |title=20-20-20 rule: How to prevent eye strain |url=https://www.medicalnewstoday.com/articles/321536 |last=Nall |first=Rachel |date=2020-05-30 |website=www.medicalnewstoday.com |language=en |access-date=2020-05-30}}
</ref> which may be the mechanism behind myopia progression.
</ref> which may be the mechanism behind myopia progression.
It is arguable if near work induced myopia is the same mechanism as lens induced myopia.  Both are cases where you are doing work closer than [[20/20 eyesight]] finds comfortable, whether that acuity is "natural" (before your first pair of glasses) or with-correction.


==References==
==References==
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[[Category:Articles]]
[[Category:Articles]]
[[Category:Eye conditions]]