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Myopia
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===Degree=== The degree of myopia is described in terms of the [[optical power|power]] of the ideal [[corrective lens|correction]], which is measured in [[Dioptre|diopters]]:<ref name="Grosvenor">{{cite journal | vauthors = Grosvenor T | title = A review and a suggested classification system for myopia on the basis of age-related prevalence and age of onset | journal = American Journal of Optometry and Physiological Optics | volume = 64 | issue = 7 | pages = 545–54 | date = July 1987 | pmid = 3307441 | doi = 10.1097/00006324-198707000-00012 }}</ref> * Myopia between −0.00 and −0.50 diopters is usually classified as [[emmetropia]]. * Low myopia usually describes myopia between −0.50 and −3.00 diopters.<ref name="Cline" /> * Moderate myopia usually describes myopia between −3.00 and −6.00 [[diopters]].<ref name="Cline" /> Those with moderate amounts of myopia are more likely to have [[pigment dispersion syndrome]] or [[glaucoma|pigmentary glaucoma]].<ref>[http://www.eyemdlink.com/Condition.asp?ConditionID=2 "Glaucoma."] {{webarchive|url=https://web.archive.org/web/20060819160824/http://www.eyemdlink.com/Condition.asp?ConditionID=2 |date=19 August 2006 }} EyeMDLink.com. Retrieved 27 August 2006.</ref> * High myopia usually describes myopia of −6.00 or more.<ref name="Cline" /><ref>{{cite journal |last1=Zejmo |first1=Maria |last2=Formińska-Kapuścik |first2=Maria |last3=Pieczara |first3=Ewa |last4=Filipek |first4=Erita |last5=Mrukwa-Kominek |first5=Ewa |last6=Samochowiec-Donocik |first6=Elzbieta |last7=Leszczyński |first7=Rafal |last8=Smuzyńska |first8=Magdalena |title=Etiopathogenesis and management of high-degree myopia. Part I |journal=Medical Science Monitor |date=September 2009 |volume=15 |issue=9 |pages=RA199-202 |pmid=19721411 |id={{INIST|21992936}} |url=https://www.medscimonit.com/abstract/index/idArt/878169 }}</ref> People with high myopia are more likely to have [[retinal detachment]]s<ref>{{EMedicine|article|798501|Retinal Detachment}}</ref> and [[glaucoma|primary open angle glaucoma]].<ref>[https://web.archive.org/web/20040204164358/http://www.agingeye.net/glaucoma/glaucomainformation.php "More Information on Glaucoma."] AgingEye Times. Retrieved 27 August 2006.</ref> They are also more likely to experience [[floater]]s, shadow-like shapes which appear in the [[visual field|field of vision]].<ref>{{cite journal | vauthors = Messmer DE | title = [Retinal detachment] | language = de | journal = Schweizerische Rundschau für Medizin Praxis = Revue Suisse de Médecine Praxis | volume = 81 | issue = 19 | pages = 622–5 | date = May 1992 | pmid = 1589678 }}</ref> In addition to this, high myopia is linked to macular degeneration, cataracts, and significant visual impairment.<ref>Banerjee S, Horton J. Lenses and Spectacles to Prevent Myopia Worsening in Children [Internet]. Ottawa (ON): Canadian Agency for Drugs and Technologies in Health; 2021 Apr. Available from:[https://www.ncbi.nlm.nih.gov/books/NBK571917/]</ref><ref>Walline JJ, Walker MK, Mutti DO, et al. Effect of High Add Power, Medium Add Power, or Single-Vision Contact Lenses on Myopia Progression in Children: The BLINK Randomized Clinical Trial. JAMA. 2020;324(6):571–580.</ref><ref>Ruiz-Pomeda A, Perez-Sanchez B, Valls I, Prieto-Garrido FL, Gutierrez-Ortega R, Villa-Collar C. MiSight Assessment Study Spain (MASS). A 2-year randomized clinical trial. Graefes Arch Clin Exp Ophthalmol. 2018;256(5):1011–1021.</ref><ref>Garcia-Del Valle AM, Blazquez V, Gros-Otero J, et al. Efficacy and safety of a soft contact lens to control myopia progression. Clin Exp Optom.2021;104(1):14–21</ref> The highest myopia ever recorded was −108 diopters by a [[Slovakia|Slovak]], Jan Miskovic.<ref>{{cite web |last1=Fitoussi |first1=Stephane |title=The World Record of Myopia |date=23 May 2023 |url=https://fluorescene.odcommunity.com/11232-2/}}</ref>
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