Modulation transfer function and pupil size in multifocal and monofocal intraocular lenses in vitro

Kawamorita, Takushi; Uozato, Hiroshi

doi:10.1016/j.jcrs.2005.10.024

Cited by 77 publications

(62 citation statements)

References 29 publications

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“…26 This might be in line with in vitro studies testing multifocal IOLs, underlining that the aperture has a substantial impact on optical performance. 38,39 Clinical reports of the effect of pupil size on straylight after multifocal IOL implantation have not been published until now; thus, further studies are needed to determine its potential effects.…”

Section: Discussionmentioning

confidence: 99%

Ocular straylight in the normal pseudophakic eye

Łabuz¹,

Reus²,

Berg³

2015

Journal of Cataract and Refractive Surgery

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PURPOSE:To assess normal values for straylight in the pseudophakic eye as a function of age and to develop a model to predict the improvement in straylight after lens extraction based on preoperative straylight levels.SETTING: Rotterdam Ophthalmic Institute, Rotterdam, the Netherlands. DESIGN:Review with retrospective cross-study analysis.METHODS: A literature review was performed to identify relevant papers on straylight and pseudophakia with no patient comorbidities. Sixteen papers met the eligibility criteria and were included in the analysis. The postoperative results were used to define the norm for straylight in pseudophakia. Straylight improvement after lens replacement was assessed by evaluation of preoperative and postoperative values. The age effect was incorporated to determine a model for straylight improvement. RESULTS:The mean postoperative straylight value derived from 16 studies (1869 eyes) was 1.21 log units G 0.21 (SD). Age dependence could be assessed from 13 studies (1533 eyes), resulting in the straylight age-norm curve in pseudophakic eyes as follows: Straylight value Z 0.0044 Â age C 0.89 with G 0.42 log units of 95% confidence interval. A strong correlation was observed between preoperative straylight and its improvement after lens extraction, yielding the following relationship: Straylight improvement Z 1.04 Â preoperative straylight value À 0.006 Â age À 0.84. CONCLUSION:A norm for straylight in the pseudophakic eye was developed that is considerably different from the previously published norm for the phakic eye. The new pseudophakic norm can be used clinically to predict the straylight value after lens replacement and as a reference criterion for clinical studies.

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Section: Discussionmentioning

confidence: 99%

Ocular straylight in the normal pseudophakic eye

Łabuz¹,

Reus²,

Berg³

2015

Journal of Cataract and Refractive Surgery

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“…MTF is considered effective for evaluating optical properties. In the past as well, Kawamorita and Uozato [17] have reported an evaluation of a monofocal IOL and Array, which is a refractive multifocal IOL. The evaluation that we performed did not contradict clinical results; therefore, we thought that MTF was effective in evaluating visual function.…”

Section: Introductionmentioning

confidence: 99%

Effect of Decentration on the Optical Performance in Multifocal Intraocular Lenses

Soda

Yaguchi

2012

Ophthalmologica

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Aims: To evaluate the influence of decentration on optical performance in multifocal intraocular lenses (IOLs) using eye models. Methods: This study evaluated 4 types of multifocal IOLs (ReSTOR SA60D3, Alcon; TECNIS Multifocal ZM900, AMO; ReZoom, AMO; SFX-MV1, Hoya). The evaluations were based on measurements of the near and far modulation transfer function (MTF) and visualized actual near images (newspaper) using eye models with the IOL horizontally displaced 0, 0.25, 0.5, 0.75 and 1.0 mm from the center. Results: For the diffractive ReSTOR the near MTF decreased with increasing decentration. The near images (newspaper characters) became difficult to distinguish at a decentration of 1.0 mm. For the diffractive ZM900, the near and far MTFs gradually decreased with increasing decentration. For the refractive ReZoom and SFX-MV1, we observed almost no change in the near MTF from a decentration of 0–1.0 mm. However, the far MTF clearly decreased starting at a decentration of 1.0 mm for ReZoom and 0.75 mm for SFX-MV1. Conclusion: The MTFs and near images are affected to a different extent depending on the design of multifocal IOLs; clinically relevant effects are not to be expected up to a decentration of 0.75 mm.

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“…While some studies have measured through-focus retinal image quality, generally using double-pass imaging techniques (Artal, Marcos, Navarro, Miranda, & Ferro, 1995;Kawamorita & Uozato, 2005;Navarro, Ferro, Artal, & Miranda, 1993) or visual quality (Gupta, Naroo, & Wolffsohn, 2009;Maxwell, Lane, & Zhou, 2009;Schmidinger et al, 2006;Woods, Woods, & Fonn, 2015), these are generally restricted to patients implanted or fitted with commercial lenses, and therefore limited to specific conditions. Most of the systematic evaluations of many of the available lenses are limited to optical computer simulations and on bench experiments, therefore lacking from the optical and the neural complexity of a patient (Martin & Roorda, 2003).…”

Section: U N C O R R E C T E D P R O O Fmentioning

confidence: 99%

Testing vision with angular and radial multifocal designs using Adaptive Optics

et al. 2017

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Multifocal vision corrections are increasingly used solutions for presbyopia. In the current study we have evaluated, optically and psychophysically, the quality provided by multizone radial and angular segmented phase designs. Optical and relative visual quality were evaluated using 8 subjects, testing 6 phase designs. Optical quality was evaluated by means of Visual Strehl-based-metrics (VS). The relative visual quality across designs was obtained through a psychophysical paradigm in which images viewed through 210 pairs of phase patterns were perceptually judged. A custom-developed Adaptive Optics (AO) system, including a Hartmann-Shack sensor and an electromagnetic deformable mirror, to measure and correct the eye's aberrations, and a phase-only reflective Spatial Light Modulator, to simulate the phase designs, was developed for this study. The multizone segmented phase designs had 2-4 zones of progressive power (0 to +3D) in either radial or angular distributions. The response of an "ideal observer" purely responding on optical grounds to the same psychophysical test performed on subjects was calculated from the VS curves, and compared with the relative visual quality results. Optical and psychophysical pattern-comparison tests showed that while 2-zone segmented designs (angular & radial) provided better performance for far and near vision, 3-and 4-zone segmented angular designs performed better for intermediate vision. AO-correction of natural aberrations of the subjects modified the response for the different subjects but general trends remained. The differences in perceived quality across the different multifocal patterns are, in a large extent, explained by optical factors. AO is an excellent tool to simulate multifocal refractions before they are manufactured or delivered to the patient, and to assess the effects of the native optics to their performance.

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Modulation transfer function and pupil size in multifocal and monofocal intraocular lenses in vitro

Cited by 77 publications

References 29 publications

Ocular straylight in the normal pseudophakic eye

Ocular straylight in the normal pseudophakic eye

Effect of Decentration on the Optical Performance in Multifocal Intraocular Lenses

Testing vision with angular and radial multifocal designs using Adaptive Optics

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