Determining the imaging quality of intraocular lenses

Norrby, Nils-Erik; Grossman, Laurence W.; Geraghty, Edward; Kreiner, C. F.; Mihori, Masatoshi; Patel, Anil S.; Portney, Valdemar; Silberman, Donn M.

doi:10.1016/s0886-3350(98)80270-8

Cited by 41 publications

(37 citation statements)

References 14 publications

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“…Experimental studies using several methods, including modulation transfer function, clarified that the optical quality of the IOL differs by optic design, optic material, and dioptres. [29][30][31][32] Our clinical study also suggests that spherical aberration of the internal optics varies according to optic design, optic material, and possibly dioptric power of the implanted IOL. Furthermore, there Figure 2 Comparisons of the mean (7SD) ocular (a), corneal (b), and internal optic (c) aberrations between eyes that received the five different types of IOL.…”

Section: Discussionmentioning

confidence: 56%

“…12,13,[29][30][31][32][33][34][35] It has been also shown that the higher-order aberration of pseudophakic eyes is comparable with that of phakic eyes of subjects of the same age, and is greater than that of young phakic eyes. [11][12][13] Recently, to compensate for the positive spherical aberration of the cornea, a prolate IOL with negative spherical aberration, the so-called aspherical IOL, has been developed.…”

Section: Discussionmentioning

confidence: 99%

“…Many experimental and several clinical studies have shown that IOLs have various degrees of higher-order aberration and optical quality depending on optic design, optic material, and dioptric power. 12,13,[29][30][31][32][33][34][35] The purpose of the study described herein was to investigate the correlation of higher-order aberrations with visual functions in eyes with a standard spherical monofocal IOL, and to confirm which types of higher-order aberration differ between eyes that received different types of IOLs.…”

Section: Introductionmentioning

confidence: 99%

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Correlation of higher-order wavefront aberrations with visual function in pseudophakic eyes

Hayashi

Yoshida

Hayashi

2007

Eye

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Aim To study the correlation between higher-order wavefront aberrations and visual function in eyes with a spherical monofocal intraocular lens (IOL), and to see if the aberrations differ between eyes that received different types of IOLs. Methods One hundred forty-eight eyes of 148 patients who underwent phacoemulsification and implantation of one of five types of acrylic IOL were enrolled. At 1 month after surgery, ocular aberrations were measured using a Hartmann-Shack aberrometer and corneal aberrations were measured using videokeratography. In addition, the aberration of internal optics was determined by subtracting the corneal aberration from the ocular aberration. These aberrations were correlated with visual acuity and with contrast visual acuity under both photopic and mesopic conditions. Results Ocular, corneal, and internal optic aberrations (total aberration, coma, and spherical aberration) were all correlated significantly with visual acuity, as well as with photopic and mesopic contrast visual acuity. The associations between internal optic aberrations and visual function tended to be stronger than were those of corneal aberrations. Furthermore, ocular aberrations differed significantly between eyes with the five different IOLs (Pp0.0078). Specifically, the internal optic spherical aberration was markedly significantly different between eyes (P ¼ 0.0142), and the corneal coma showed a marginally significant difference (P ¼ 0.0421). Conclusion Ocular, corneal, and internal optic higher-order wavefront aberrations are correlated significantly with visual function in eyes with a spherical monofocal IOL. The spherical aberration of the internal optics and coma of the cornea vary between eyes with different types of IOL.

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Section: Discussionmentioning

confidence: 56%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Correlation of higher-order wavefront aberrations with visual function in pseudophakic eyes

Hayashi

Yoshida

Hayashi

2007

Eye

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“…1 The optical quality of isolated IOLs has received considerable attention, and most IOLs have a better optical quality than crystalline lenses. However, IOLs with better optical quality does not show the same optimal quality in vivo as expected in optical laboratory system.…”

Section: Introductionmentioning

confidence: 99%

“…However, IOLs with better optical quality does not show the same optimal quality in vivo as expected in optical laboratory system. [1][2][3] One explanation is that optical quality is governed by both the cornea and the IOL. Studies have shown that cornea aberrations are at least partially compensated by lenticular aberrations in young human eyes.…”

Section: Introductionmentioning

confidence: 99%

Comparison of higher order aberrations in eyes with aspherical or spherical intraocular lenses

Ahn

Kim

et al. 2008

Eye

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Purpose To compare ocular, internal, corneal aberrations, and contrast sensitivity in patients implanted with aspheric or spherical intraocular lenses (IOLs). Methods Total, corneal, and internal aberrations were measured using ray-tracing technology in 23 eyes implanted with aspheric (Tecnis ZA9003) IOLs, and in 25 eyes implanted with spherical (AcrySof SA60AT) IOLs. Spherical aberration (SA), coma, trefoil, and RMS of higher order aberrations (HOAs) were analysed for 4.0 and 6.0 mm optical zones. Best-corrected visual acuities (BCVAs), contrast sensitivity under photopic and mesopic conditions, and modulation transfer function (MTF) were evaluated to compare visual performances. Results The mean internal SA was À0.06/ À0.35 lm in the aspheric IOL group and 0.04/ 0.17 lm in the spherical IOL group (at 4 mm/ 6 mm pupil). Total SA was near to zero in the aspheric IOL group, and was 0.11±0.034/ 0.48±0.13 lm in the spherical IOL group. The internal Z 3 À1 and total Z 3 À1 were more negative in the spherical IOL group. The internal Z 3 À3 was more negative in the aspheric IOL group. The two groups were similar in terms of other Zernike values and RMS of HOA. There were no differences in BCVA between groups. The aspheric IOL group showed better contrast sensitivity at 3-6 cpd in photopic and 1.5-6 cpd in mesopic conditions. The MTF curve was better for the aspheric IOL group at 5-10 cpd. Conclusions The aspheric IOL with a negative SA reduced total SA by compensating for positive corneal SA. These effects resulted in improved contrast sensitivity.

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Der Einfluß der Kompression auf die Form und die optischen Eigenschaften faltbarer Intraokularlinsen

Terwee¹

1999

12. Kongreß Der Deutschsprachigen Gesellschaft Für Intraokularlinsen-Implantation Und Refraktive Chirurgie

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Determining the imaging quality of intraocular lenses

Cited by 41 publications

References 14 publications

Correlation of higher-order wavefront aberrations with visual function in pseudophakic eyes

Correlation of higher-order wavefront aberrations with visual function in pseudophakic eyes

Comparison of higher order aberrations in eyes with aspherical or spherical intraocular lenses

Der Einfluß der Kompression auf die Form und die optischen Eigenschaften faltbarer Intraokularlinsen

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