Peripheral aberrations in adult hyperopes, emmetropes and myopes

Osuagwu, Uchechukwu L.; Suheimat, Marwan; Atchison, David A.

doi:10.1111/opo.12354

Cited by 19 publications

(32 citation statements)

References 55 publications

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“…Population weighted average Zernike co‐efficients for the horizontal VF are listed in Table . The values were obtained using all studies from Table with available wavefront data . Calculations for each angular position were made for a 4 mm pupil diameter using the full extent of available wavefront data, that is all Zernike co‐efficients and all angles reported.…”

Section: Resultsmentioning

confidence: 99%

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Peripheral refraction and higher order aberrations

Romashchenko

Rosén²,

Lundström

2020

Clinical and Experimental Optometry

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Peripheral image quality influences several aspects of human vision. Apart from off‐axis visual functions, the manipulation of peripheral optical errors is widely used in myopia control interventions. This, together with recent technological advancements enabling the measurement of peripheral errors, has inspired many studies concerning off‐axis optical aberrations. However, direct comparison between these studies is often not straightforward. To enable between‐study comparisons and to summarise the current state of knowledge, this review presents population data analysed using a consistent approach from 16 studies on peripheral ocular optical quality (in total over 2,400 eyes). The presented data include refractive errors and higher order monochromatic aberrations expressed as Zernike co‐efficients (reported in a subset of the studies) over the horizontal visual field. Additionally, modulation transfer functions, describing the monochromatic image quality, are calculated using individual wavefront data from three studies. The analysed data show that optical errors increase with increasing eccentricity as expected from theoretical modelling. Compared to emmetropes, myopes tend to have more hypermetropic relative peripheral refraction over the horizontal field and worse image quality in the near‐periphery of the nasal visual field. The modulation transfer functions depend considerably on pupil shape (for angles larger than 30°) and to some extent, the number of Zernike terms included. Moreover, modulation transfer functions calculated from the average Zernike co‐efficients of a cohort are artificially inflated compared to the average of individual modulation transfer functions from the same cohort. The data collated in this review are important for the design of ocular corrections and the development and assessment of optical eye models.

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Section: Resultsmentioning

confidence: 99%

“…Peripheral ocular aberrations and their effect on retinal image quality were assessed using data from 16 articles, listed in Table . For three studies, marked with an asterisk, wavefront data for each individual subject were generously shared by the authors .…”

Section: Peripheral Ocular Aberrations Datamentioning

confidence: 99%

Peripheral refraction and higher order aberrations

Romashchenko

Rosén²,

Lundström

2020

Clinical and Experimental Optometry

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“…Off‐axis HOAs are typically of greater magnitude than on‐axis HOAs, particularly for coma terms, likely as a result of the change in alignment and shape differences of the ocular refractive surfaces from off‐axis incident light rays . Changes in off‐axis HOAs also occur with age.…”

Section: Hoas and Agementioning

confidence: 93%

“…Cross‐sectional studies of off‐axis HOAs in young adults have shown that HOA RMS increases more rapidly with visual field eccentricity in myopes than in emmetropes; however, Osuagwu et al found no significant differences between refractive error groups. Consistent with the findings of on‐axis HOA studies, myopes exhibit more negative primary spherical aberration (

Z_{4}^{0}

) than emmetropes, and hyperopes display more positive primary spherical aberration (

Z_{4}^{0}

) than emmetropes and myopes on average across the visual field .…”

Section: Hoas and Refractive Errormentioning

confidence: 97%

“…Philip et al also found that primary vertical coma (

Z_{3}^{- 1}

) was more negative in myopic eyes than hyperopic eyes in the temporal field, while myopes displayed more positive primary horizontal coma (

Z_{3}^{1}

) than hyperopes in the inferior visual field. Like the findings for off‐axis primary spherical aberration (

Z_{4}^{0}

) in young adults, hyperopic eyes showed more positive values than emmetropic and myopic eyes at all observed eccentricities …”

Section: Hoas and Refractive Errormentioning

confidence: 99%

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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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