$Peripheral refraction of myopic eyes with spectacle lenses correction and lens free emmetropes during accommodation$
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Peripheral refraction of myopic eyes with spectacle lenses correction and lens free emmetropes during accommodation

Abstract Purpose To measure axial and off-axis refraction patterns in myopic eyes with spectacle lenses correction and lens free emmetropes in young healthy subjects at different target distances from 2.00 m (0.50 D) to 0.20 m (5.00 D) in terms of sphere, astigmatism, and spherical equivalent refrac...

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Autores principales:	António Queirós, Alejandro Cerviño, José Manuel González-Méijome
Formato:	article
Lenguaje:	EN
Publicado:	BMC 2021
Materias:	Off-axis refraction Refractive error Accommodation Myopia progression Ophthalmology RE1-994
Acceso en línea:	https://doaj.org/article/91370f40c6e6469aa5d0036a758a9d5d
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spelling	oai:doaj.org-article:91370f40c6e6469aa5d0036a758a9d5d2021-12-05T12:16:36ZPeripheral refraction of myopic eyes with spectacle lenses correction and lens free emmetropes during accommodation10.1186/s40662-021-00267-x2326-0254https://doaj.org/article/91370f40c6e6469aa5d0036a758a9d5d2021-12-01T00:00:00Zhttps://doi.org/10.1186/s40662-021-00267-xhttps://doaj.org/toc/2326-0254Abstract Purpose To measure axial and off-axis refraction patterns in myopic eyes with spectacle lenses correction and lens free emmetropes in young healthy subjects at different target distances from 2.00 m (0.50 D) to 0.20 m (5.00 D) in terms of sphere, astigmatism, and spherical equivalent refraction. Methods Refraction was measured at the center, 20 and 40 degrees from the line of sight both nasally and temporally in 15 emmetropic and 25 myopic young healthy subjects with an open field, binocular, infrared autorefractor (Grand Seiko WAM-5500, Hiroshima, Japan). Fixation target was a Maltese cross set at 2.00, 0.50, 0.33 and 0.20 m from the corneal plane. Changes in off-axis refraction with accommodation level were normalized with respect to distance axial values and compared between myopic eyes with spectacle lenses correction and lens free emmetropes. Results Off-axis refraction in myopic eyes with spectacle lenses correction was significantly more myopic in the temporal retina compared to lens free emmetropes except for the closest target distance. Relative off-axis refractive error changed significantly with accommodation when compared to axial refraction particularly in the myopic group. This change in the negative direction was due to changes in the spherical component of refraction that became more myopic relative to the center at the 0.20 m distance as the J0 component of astigmatism was significantly reduced in both emmetropes and myopes for the closest target. Conclusion Accommodation to very near targets (up to 0.20 m) makes the off-axis refraction of myopes wearing their spectacle correction similar to that of lens free emmetropes. A significant reduction in off-axis astigmatism was also observed for the 0.20 m distance.António QueirósAlejandro CerviñoJosé Manuel González-MéijomeBMCarticleOff-axis refractionRefractive errorAccommodationMyopia progressionOphthalmologyRE1-994ENEye and Vision, Vol 8, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Off-axis refraction Refractive error Accommodation Myopia progression Ophthalmology RE1-994
spellingShingle	Off-axis refraction Refractive error Accommodation Myopia progression Ophthalmology RE1-994 António Queirós Alejandro Cerviño José Manuel González-Méijome Peripheral refraction of myopic eyes with spectacle lenses correction and lens free emmetropes during accommodation
description	Abstract Purpose To measure axial and off-axis refraction patterns in myopic eyes with spectacle lenses correction and lens free emmetropes in young healthy subjects at different target distances from 2.00 m (0.50 D) to 0.20 m (5.00 D) in terms of sphere, astigmatism, and spherical equivalent refraction. Methods Refraction was measured at the center, 20 and 40 degrees from the line of sight both nasally and temporally in 15 emmetropic and 25 myopic young healthy subjects with an open field, binocular, infrared autorefractor (Grand Seiko WAM-5500, Hiroshima, Japan). Fixation target was a Maltese cross set at 2.00, 0.50, 0.33 and 0.20 m from the corneal plane. Changes in off-axis refraction with accommodation level were normalized with respect to distance axial values and compared between myopic eyes with spectacle lenses correction and lens free emmetropes. Results Off-axis refraction in myopic eyes with spectacle lenses correction was significantly more myopic in the temporal retina compared to lens free emmetropes except for the closest target distance. Relative off-axis refractive error changed significantly with accommodation when compared to axial refraction particularly in the myopic group. This change in the negative direction was due to changes in the spherical component of refraction that became more myopic relative to the center at the 0.20 m distance as the J0 component of astigmatism was significantly reduced in both emmetropes and myopes for the closest target. Conclusion Accommodation to very near targets (up to 0.20 m) makes the off-axis refraction of myopes wearing their spectacle correction similar to that of lens free emmetropes. A significant reduction in off-axis astigmatism was also observed for the 0.20 m distance.
format	article
author	António Queirós Alejandro Cerviño José Manuel González-Méijome
author_facet	António Queirós Alejandro Cerviño José Manuel González-Méijome
author_sort	António Queirós
title	Peripheral refraction of myopic eyes with spectacle lenses correction and lens free emmetropes during accommodation
title_short	Peripheral refraction of myopic eyes with spectacle lenses correction and lens free emmetropes during accommodation
title_full	Peripheral refraction of myopic eyes with spectacle lenses correction and lens free emmetropes during accommodation
title_fullStr	Peripheral refraction of myopic eyes with spectacle lenses correction and lens free emmetropes during accommodation
title_full_unstemmed	Peripheral refraction of myopic eyes with spectacle lenses correction and lens free emmetropes during accommodation
title_sort	peripheral refraction of myopic eyes with spectacle lenses correction and lens free emmetropes during accommodation
publisher	BMC
publishDate	2021
url	https://doaj.org/article/91370f40c6e6469aa5d0036a758a9d5d
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Peripheral refraction of myopic eyes with spectacle lenses correction and lens free emmetropes during accommodation

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