Peripheral Refraction and Aberration Profiles with Multifocal Lenses

Fedtke, Cathleen; Ehrmann, Klaus; Thomas, Varghese; Bakaraju, Ravi C.

doi:10.1097/opx.0000000000001112

Cited by 28 publications

(35 citation statements)

References 45 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%

“…There has been considerable interest in recent years in the possibility that peripheral refraction pattern contributes to the progression of myopia, and that progression can be slowed by treatments that convert an excess of hyperopia in the peripheral field, relative to on‐axis refraction, into a relative myopic pattern. Treatments include orthokeratology, spectacle lenses and contact lenses . In the case of the latter two, treatment can be either with lenses whose original purpose was to correct presbyopia or lenses specifically designed to control myopia progression .…”

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%

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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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“…The measured effect of different soft contact lens designs on HOAs are similar; however, there are some notable differences (Figure ). Distance‐centre multifocal contact lenses produce significant positive shifts in primary spherical aberration (

Z_{4}^{0}

) ranging from 0.125 μm with a low (+1.50 D) to 0.245 μm with a high add (+2.50 D) for a 5 mm pupil . In addition, Fedtke et al demonstrated that primary horizontal coma (

Z_{3}^{1}

) increases with multifocal contact lenses due to lens decentration.…”

Section: Hoas and Myopia Control Interventionsmentioning

confidence: 99%

“…Distance‐centre multifocal contact lenses produce significant positive shifts in primary spherical aberration (

Z_{4}^{0}

) ranging from 0.125 μm with a low (+1.50 D) to 0.245 μm with a high add (+2.50 D) for a 5 mm pupil . In addition, Fedtke et al demonstrated that primary horizontal coma (

Z_{3}^{1}

) increases with multifocal contact lenses due to lens decentration. On‐eye modelling of distance‐centre dual‐focus lenses through a schematic eye showed that these lenses also shift primary spherical aberration (

Z_{4}^{0}

) more positively when measured across a 3 mm pupil; however, primary spherical aberration (

Z_{4}^{0}

) became negative when analysed over a 4 mm pupil and more so over a 5 mm pupil.…”

Section: Hoas and Myopia Control Interventionsmentioning

confidence: 99%

Higher order aberrations, refractive error development and myopia control: a review

Hughes

Vincent

Read

et al. 2020

Clinical and Experimental Optometry

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Evidence from animal and human studies suggests that ocular growth is influenced by visual experience. Reduced retinal image quality and imposed optical defocus result in predictable changes in axial eye growth. Higher order aberrations are optical imperfections of the eye that alter retinal image quality despite optimal correction of spherical defocus and astigmatism. Since higher order aberrations reduce retinal image quality and produce variations in optical vergence across the entrance pupil of the eye, they may provide optical signals that contribute to the regulation and modulation of eye growth and refractive error development. The magnitude and type of higher order aberrations vary with age, refractive error, and during near work and accommodation. Furthermore, distinctive changes in higher order aberrations occur with various myopia control treatments, including atropine, near addition spectacle lenses, orthokeratology and soft multifocal and dual‐focus contact lenses. Several plausible mechanisms have been proposed by which higher order aberrations may influence axial eye growth, the development of refractive error, and the treatment effect of myopia control interventions. Future studies of higher order aberrations, particularly during childhood, accommodation, and treatment with myopia control interventions are required to further our understanding of their potential role in refractive error development and eye growth.

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73‐2: Invited Paper: Effects of Displays on Myopia and Possible Countermeasures Based on Epidemiology in Japan

Kawamorita

2020

Symp Digest of Tech Papers

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Peripheral Refraction and Aberration Profiles with Multifocal Lenses

Cited by 28 publications

References 45 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

Higher order aberrations, refractive error development and myopia control: a review

73‐2: Invited Paper: Effects of Displays on Myopia and Possible Countermeasures Based on Epidemiology in Japan

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