Influence of spherical intraocular lens implantation and conventional laser in situ keratomileusis on peripheral ocular aberrations

Mathur, Ankit; Atchison, David A.

doi:10.1016/j.jcrs.2010.01.018

Cited by 14 publications

(7 citation statements)

References 43 publications

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“…Mathur et al studied the optical quality after OK [ 10 ] and LASIK [ 20 ]. They performed measurements across the 42° horizontal vs 32° vertical central visual field in samples of 3 (OK) and 6 (LASIK) subjects and observed an increase of high-order aberration at peripheral locations after both treatments.…”

Section: Discussionmentioning

confidence: 99%

“…Ehsaei et al [ 42 ] studied refractive error across four meridians in healthy myopic subjects and emmetropes and they obtained comparable results with eccentricity-dependent profile, to the overall eccentricities studied, such as shown by Shen et al [ 43 ]. Most of the previous studies with respect to the refractive profile before and after refractive treatments only reported results from the horizontal meridian [ 9 , 17 ] or horizontal and vertical meridians [ 10 , 20 , 32 ]. Autorefractometers were mostly used [ 9 – 11 , 17 ], but wavefront sensors [ 10 , 20 ] were also introduced in this kind of evaluation since there was a good correlation between autorefractometers and Hartmann-Shack aberrometer values [ 44 ].…”

Section: Discussionmentioning

confidence: 99%

“…Laser-Assisted in Situ Keratomileusis (LASIK) allows to reduce the dependence on spectacles or contact lenses. Although LASIK is not applied with the purpose for regulating myopia, the peripheral refraction and peripheral image quality has been previously characterized along the horizontal meridian [ 17 – 20 ].…”

Section: Introductionmentioning

confidence: 99%

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Relative peripheral refraction across 4 meridians after orthokeratology and LASIK surgery

et al. 2018

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BackgroundTo characterize the axial and off-axis refraction across four meridians of the retina in myopic eyes before and after Orthokeratology (OK) and LASIK surgery.MethodsSixty right eyes with a spherical equivalent (M) between − 0.75 to − 5.25 D (cylinder <− 1.00 D) underwent LASIK (n = 26) or OK (n = 34) to treat myopia. Axial and off-axis refraction were measured with an open-field autorefractometer before and after stabilized treatments. Off-axis measurements were obtained for the horizontal (35° nasal and temporal retina) and vertical (15° superior and inferior retina) meridians, and for two oblique directions (45–225° and 135–315°) up to 20° of eccentricity. The refractive profile was addressed as relative peripheral refractive error (RPRE).ResultsOK and LASIK post-treatment results showed an increase of myopic relative refraction at several eccentric locations. At the four meridians evaluated, the M component of the pre-treatment RPRE values was not statistically different (p > 0.05) from the post-treatment RPRE within 30° and 20° of the central visual field after LASIK and OK, respectively. These results demonstrated that the treatment zone warrants an optimal central field of vision.ConclusionsThe present study gives an overview of RPRE after refractive corneal reshaping treatments (OK and LASIK) across vertical, horizontal and two oblique meridians together. This allows a 3D representation of RPRE at the retina and shows that the myopic shift induced by both treatments is more relevant in horizontal directions.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Relative peripheral refraction across 4 meridians after orthokeratology and LASIK surgery

et al. 2018

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“…[1][2][3] The higher-order aberrations also have received attention in the last dozen years. [4][5][6][7][8][9][10][11][12][13][14][15][16] Investigations of on-axis (foveal) aberrations assume circular pupils, and for most eyes this is a reasonable approximation. 17 A set of circular polynomials, such as Zernike polynomials, is used to describe the wavefronts, and the refractions may be obtained from the coefficients.…”

Section: Introductionmentioning

confidence: 99%

Specifying peripheral aberrations in visual science

et al. 2012

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Abstract. Purpose: Investigations of foveal aberrations assume circular pupils. However, the pupil becomes increasingly elliptical with increase in visual field eccentricity. We address this and other issues concerning peripheral aberration specification. Methods: One approach uses an elliptical pupil similar to the actual pupil shape, stretched along its minor axis to become a circle so that Zernike circular aberration polynomials may be used. Another approach uses a circular pupil whose diameter matches either the larger or smaller dimension of the elliptical pupil. Pictorial presentation of aberrations, influence of wavelength on aberrations, sign differences between aberrations for fellow eyes, and referencing position to either the visual field or the retina are considered. Results: Examples show differences between the two approaches. Each has its advantages and disadvantages, but there are ways to compensate for most disadvantages. Two representations of data are pupil aberration maps at each position in the visual field and maps showing the variation in individual aberration coefficients across the field. Conclusions: Based on simplicity of use, adequacy of approximation, possible departures of off-axis pupils from ellipticity, and ease of understanding by clinicians, the circular pupil approach is preferable to the stretched elliptical approach for studies involving field angles up to 30 deg.

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“…13,14 Previous theoretical work 15,16 predicted an increase in peripheral astigmatism in pseudophakic eyes due to the intraocular lens (IOL) design. A more recent experimental study 17 also showed a tendency toward more myopic spherical equivalents (SEs) in the periphery at G20 degrees relative to the fovea in eyes implanted with IOLs compared with normal phakic eyes. Although cataract surgery attempts to minimize foveal refractive errors after removing the cataractous lens, peripheral refractive errors might require closer consideration for the reasons listed above.…”

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confidence: 97%

Peripheral refraction in pseudophakic eyes measured by infrared scanning photoretinoscopy

Tabernero¹,

Ohlendorf²,

Fischer³

et al. 2012

Journal of Cataract and Refractive Surgery

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Influence of spherical intraocular lens implantation and conventional laser in situ keratomileusis on peripheral ocular aberrations

Abstract: No author has a financial or proprietary interest in any material or method mentioned.

Cited by 14 publications

References 43 publications

Relative peripheral refraction across 4 meridians after orthokeratology and LASIK surgery

Relative peripheral refraction across 4 meridians after orthokeratology and LASIK surgery

Specifying peripheral aberrations in visual science

Peripheral refraction in pseudophakic eyes measured by infrared scanning photoretinoscopy

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