Astigmatic Peripheral Defocus with Different Contact Lenses: Review and Meta-Analysis

Queirós, António; Lopes-Ferreira, Daniela; González-Meijóme, José Manuel

doi:10.3109/02713683.2015.1116585

Cited by 20 publications

(24 citation statements)

References 55 publications

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“…However, the changes in refraction occurred more quickly into the nasal field than into the temporal field. This is consistent with previous studies, and will be investigated further.…”

Section: Discussionsupporting

confidence: 93%

“…The peripheral zones of multifocal contact lenses are rotationally symmetrical. However with multifocal contact lenses, studies have found more myopic shift on peripheral refraction for the nasal than for the temporal visual field …”

Section: Introductionmentioning

confidence: 98%

“…However with multifocal contact lenses, studies have found more myopic shift on peripheral refraction for the nasal than for the temporal visual field. 11,12,[16][17][18][19][20] Peripheral refraction measurement with instruments can be accomplished by rotating the eye to look at a range of targets off the instrument axis, with the head kept stationary. Another possibility is to rotate the head and eye together (hereafter referred to as head rotation) to achieve the same effect.…”

Section: Introductionmentioning

confidence: 99%

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Effects of eye rotation and contact lens decentration on horizontal peripheral refraction

Jaisankar

Leube

Gifford

et al. 2019

Ophthalmic Physiologic Optic

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Purpose Peripheral refraction is important in design of myopia control therapies. The aim was to investigate the influence of contact lens decentration associated with eye rotation on peripheral refraction in the horizontal visual field. Methods Participants were 10 emmetropes and 10 myopes in good general and ocular health. Right eyes underwent cycloplegic peripheral refraction, using a Grand‐Seiko WAM‐5500 Autorefractor, in 5° steps to ±35° eccentricities along the horizontal visual field. Targets were fixated using eye rotation only or head rotation only. Refractions were measured without correction and with three types of contact lenses: single vision, a multifocal centre‐distance aspheric with +2.50 D add and NaturalVue aspheric. Photographs of eyes during lens wear were taken for each eye rotation. Effects of visual field angle, lens type and test method (head or eye rotation) on vector components of relative peripheral refraction were evaluated using repeated measures anovas. Test method for each visual field angle/lens combination were compared via paired t‐tests. Results Horizontal decentration ranges across the visual field were 1.2 ± 0.6 mm for single vision and 1.2 ± 0.4 mm for multifocal lenses but smaller at 0.7 ± 0.4 mm for NaturalVue lenses. There were only two significant effects of test method across the visual field angle/lens type combinations (single vision: for emmetropes horizontal/vertical astigmatism component at 35° nasal with mean difference −0.38 D and for myopes spherical equivalent refraction at 20° temporal with mean difference +0.24 D). Conclusion Upon eye rotation the contact lenses decentred on the eye, but not enough to affect peripheral refraction. For the types assessed and for the horizontal visual field out to ±35° when measurements were performed with the Grand‐Seiko WAM‐5500 autorefractor, it is valid to use eye rotations to investigate peripheral refraction.

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“…However, the changes in refraction occurred more quickly into the nasal field than into the temporal field. This is consistent with previous studies, and will be investigated further.…”

Section: Discussionsupporting

confidence: 93%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effects of eye rotation and contact lens decentration on horizontal peripheral refraction

Jaisankar

Leube

Gifford

et al. 2019

Ophthalmic Physiologic Optic

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“…Thus, several optical means have attempted to reduce the magnitude of hyperopic peripheral defocus or peripherally impose myopic defocus while maintaining good correction of foveal refractive errors. Orthokeratology, multifocal soft contact lenses, custom-designed rigid gas permeable lenses, and some novel contact lens designs can effectively regulate peripheral refraction in myopic eyes [9][10][11]. If the hypothesis is correct, it is important to quantify the effect of these lenses on imposing peripheral myopic defocus.…”

Section: Introductionmentioning

confidence: 99%

Effects of novel multifocal soft contact lens on peripheral refraction of myopic eyes when looking at distant and near targets

Liu

Mao

Wen

et al. 2020

Preprint

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Background It is generally accepted the association between hyperopic peripheral defocus and myopia progression. To search for a good optical method to slow the myopia progression for the children who need long-time near work, we compared the effects of novel multifocal soft contact lenses (MFSCLs) with single vision soft contact lenses (SVSCLs) on peripheral refraction when looking at both distant and near targets. Methods The refraction of 25 young myopic subjects’ right eye were measured at horizontal retina eccentricities in 10º steps from 30º temporal to 30º nasal, with no correction (baseline), novel MFSCLs and SVSCLs when looking at distant (5 m) and near (0.4 m) targets. Results Subjects wearing MFSCLs presented significantly more myopic relative peripheral refractive error (RPRE) profile than SVSCLs at all horizontal retina eccentricities when looking at distant targets (all p<0.01). Compared with looking at distant targets, subjects wearing SVSCLs or MFSCLs showed a hyperopic shift of peripheral defocus when looking at near targets, owning to the effects of accommodative lag and hyperopic RPRE change during accommodation (except T20º and T30º wearing SVSCLs and N30º wearing MFSCLs, p=0.822, p=0.950, p=0.390, respectively, all other eccentricities p<0.05). But subjects wearing MFSCLs could still maintain a certain magnitude of myopic peripheral defocus at horizontal retina eccentricities when looking at near targets (T20° and T30°, p=0.023 and p<0.001, respectively). Conclusions The novel MFSCLs imposed strong myopic peripheral defocus when looking at distant targets. They also maintain a certain magnitude of myopic peripheral defocus when looking at near targets, regardless of the hyperopic effect of accommodation lag and hyperopic shift in RPRE during accommodation.

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“…Several methods have been proposed to slow myopia progression; among them, non-pharmacological treatments, like orthokeratology and peripheral defocus modifying contact lenses (CLs) achieved very good outcomes, which has been attributed to the induction of a myopic Relative Peripheral Refractive Error (RPRE), although the optical mechanisms for myopia development still remain controversial. [1][2][3][4][5][6][7] Different designs of multifocal CLs were proposed to this aim, 6,[8][9][10] and consequently, the amount and extension of the induced RPRE vary among lenses. Since the ocular growth during the emmetropization process might depend on the stimulated retinal areas, 11 it is expected that different designs will provide different results.…”

Section: Introductionmentioning

confidence: 99%

Relative Peripheral Myopia Induced by Fractal Contact Lenses

Rodríguez‐Vallejo¹,

Montagud

Monsoriu

et al. 2018

Current Eye Research

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Astigmatic Peripheral Defocus with Different Contact Lenses: Review and Meta-Analysis

Abstract: Orthokeratology, multifocal soft CL, and custom-designed RGP CL were able to generate a significant relative peripheral myopia in myopic eyes. Conversely, standard and experimental soft CL were not able to induce significant peripheral myopic and astigmatic defocus values.

Cited by 20 publications

References 55 publications

Effects of eye rotation and contact lens decentration on horizontal peripheral refraction

Effects of eye rotation and contact lens decentration on horizontal peripheral refraction

Effects of novel multifocal soft contact lens on peripheral refraction of myopic eyes when looking at distant and near targets

Relative Peripheral Myopia Induced by Fractal Contact Lenses

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