&lt;p&gt;The Impact of IOL Abbe Number on Polychromatic Image Quality of Pseudophakic Eyes&lt;/p&gt;

Bradley, Arthur; Xu, Renfeng; Wang, Huachun; Jaskulski, Matt; Hong, Xin; Brink, Nicolette; Noy, Stephen Van

doi:10.2147/opth.s233099

Cited by 9 publications

(9 citation statements)

References 40 publications

(82 reference statements)

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“…Our results show that the polychromatic MTF of the multizonal lens (24%) decreased less than that of the diffractive model (44%) at far. The material properties may be one factor, as the diffractive lens has a lower Abbe number and thus higher chromatic aberration than the multizonal lens [24]. However, at the secondary foci, chromatic effects were minimized by the lens's diffractive design at the intermediate and near foci [15,20].…”

Section: Discussionmentioning

confidence: 99%

Spectral Effects and Range of Focus in a Multizonal-Refractive Intraocular Lens Compared with a Standard Trifocal Diffractive Design

et al. 2023

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Introduction: This study was performed to compare the optical performance of a multizonal presbyopia-correcting intraocular lens (IOL) and a conventional trifocal model. Methods: The optical quality and simulated visual acuity (VA) of 570 Precizon Presbyopic NVA (OPHTEC BV) and AcrySof IQ PanOptix (Alcon) were compared. The Precizon features a refractive design consisting of alternating optical zones that converge the incident light into two principal foci and a transitional zone for intermediate vision. By contrast, the PanOptix applies a diffractive (non-apodized) profile to achieve trifocality. Simulated VA was derived from the modulation transfer function. Chromatic aberration effects were also studied. Results: The diffractive and multizonal-refractive lenses yielded comparable simulated VAs at far focus (0.00 logMAR). All curves showed a reduction in expected VA with an increase in negative defocus. At -1.0 D, the multizonal-refractive IOL's VA dropped by 0.05 logMAR, but for the diffractive model, it was one line (0.11 logMAR). The multizonal-refractive lens's VA prediction at the secondary peak was 0.03 logMAR-minimally better than the 0.06 log-MAR of the diffractive lens at -2.5 D. The refractive lens exhibited a 24% decrease in polychromatic optical quality due to material dispersion. The performance of PanOptix was more substantially affected, showing a 44% loss at 50 lp/mm at far, with minimal effects at other distances. Conclusion:The multizonal-refractive lens does not fall short of the established trifocal IOL, and it can be used to extend the visual range of pseudophakic patients. Although the multizonal-refractive lens has lower material dispersion, the diffractive model corrects chromatism beyond far focus.

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Section: Discussionmentioning

confidence: 99%

Spectral Effects and Range of Focus in a Multizonal-Refractive Intraocular Lens Compared with a Standard Trifocal Diffractive Design

et al. 2023

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“…Although the simultaneous correction of monochromatic and chromatic aberrations may further improve VA and CS [ 16 ], making a clinical application of this approach is not feasible. Given, however, a minimal effect of LCA on the visual quality, also confirmed in a recent simulation study [ 8 ], increasing its level in monofocal patients rather than reducing it might have the advantage of extending the eye's intermediate range. The EDoF effect can be particularly appreciated when the corrected and increased LCA conditions are directly compared with at least one-line VA improvement at the defocus ≥ 1.0 D.…”

Section: Discussionmentioning

confidence: 82%

“…In the human eye, an LCA of about 2 D has been found in the 400–700 nm range [ 7 ]. Despite this sizeable chromatic shift, the retinal spectral sensitivity mitigates the impact of LCA on polychromatic vision, which is comparable to a blurring effect of a spherical lens with < 0.25 D defocus [ 8 ]. Monochromatic aberrations may further reduce the LCA impact on the visual quality [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

Altering chromatic aberration: how this latest trend in intraocular-lens design affects visual quality in pseudophakic patients

Łabuz,

Güngör,

Auffarth

et al. 2023

Eye and Vis

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Background Chromatic aberration of the eye results from the dispersion of polychromatic light at the interfaces of ocular media. An intraocular lens (IOL) based approach utilizing the diffractive-multifocal principle has been proposed for its correction, but the clinical evidence on the impact of reducing or increasing chromatic aberration on the visual quality of pseudophakic patients remains scarce. Methods In this cross-sectional study, longitudinal chromatic aberration (LCA) effects were studied monocularly in 37 patients implanted with a monofocal lens. LogMAR corrected distance visual acuity (VA) and defocus curve at the + 1.0 D to − 2.0 D range were assessed. Contrast sensitivity (CS) was evaluated at far and at four spatial frequencies. Measurements were performed with the eye's natural conditions, as well as with increased and corrected (by the same amount) LCA, which was altered by introducing zero-power trial triplets. Results The mean (± standard deviation) logMAR VA was − 0.11 ± 0.07 for the natural condition, − 0.13 ± 0.07 for the LCA-corrected eye, and − 0.06 ± 0.08 for the eye with increased LCA. A sharp decline of the defocus tolerance was found after the LCA correction with the VA value of 0.38 ± 0.15 logMAR at − 1.5 D. However, for the natural and increased LCA, it was 0.32 ± 0.16 logMAR and 0.25 ± 0.13 logMAR, respectively. CS was improved at all spatial frequencies after the LCA correction, which was closely followed by the natural-eye performance. Increased LCA resulted in reduced CS, mainly at higher spatial frequencies. Conclusions We demonstrated that elevating chromatic aberration above the natural level of monofocal patients extends their depth of focus while causing a measurable albeit minimal reduction in visual function. Still, the observed changes indicate that neither correction nor increase of LCA yields a substantial clinical effect on distance VA and CS in monofocal pseudophakia.

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“…In monofocal purely refractive IOLs, this feature is directly linked to a lower LCA. (21) In addition, the TECNIS lens provided better outcomes for the three objective parameters of optical quality that were measured with the OQAS device (namely, MTF, OSI, and SR); these differences were not only statistically significant but they may also have clinical relevance, especially as far as OSI is concerned. Our results for the TECNIS IOL group are very similar to those reported by Chen (17) for the same IOL model corresponding to the 6-month…”

Section: Discussionmentioning

confidence: 91%

Comparison of visual performance between two aspheric monofocal intraocular lens models

Poyales¹,

Garzón

Rico³

et al. 2021

Clinical and Experimental Optometry

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Purpose: To assess the difference in visual acuity and optical quality between two monofocal intraocular lens (IOL) models Material and Methods: Prospective, parallel and randomized clinical study. Sixty patients were implanted bilaterally, 30 per group, with IOL TECNIS® ZCB00 or Clareon® CNA0T0. Visual outcomes obtained at 1 and 3 months after surgery included both uncorrected and corrected monocular distance visual acuity (UCVA and DCVA, respectively), objective index scattering (OSI), modulation transfer function cutoff(MTF), Strehl Ratio (SR), contrast sensitivity (CS) defocus curve, IOL's spherical aberration (SA), and eye's longitudinal chromatic aberration (LCA). Patient's satisfaction was assessed using CatQuest-9SF questionnaire at 3 months postoperatively. Results: Regarding all the parameters assessed, there were statistically significant differences for DCVA (p = .008), OSI (p= .050) and SR (p= .003) between groups. Outcomes related to CS defocus curve showed statistically significant differences for vergences between -0.50 D and +1.00 D (3 mm pupil) and for vergences of 0.00 D and +0,50 D (4.5 mm pupil) between groups. Overall, IOL TECNIS® showed better results regarding visual acuity and optical quality, including a lower LCA result in comparison to Clareon®. Patient's satisfaction evaluated with CatQuest-9SF showed that TECNIS group achieved better outcomes although the differences were statistically significant only for the 'Reading text on television' item (p = 0.027). Conclusion: Both IOL models showed excellent quantity of vision, optical and visual quality as well as high patient's satisfaction after cataract surgery. Despite it, the TECNIS® ZCB00 model did provide slightly better outcomes, yet statistically significant, than the Clareon® CNA0T0

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<p>The Impact of IOL Abbe Number on Polychromatic Image Quality of Pseudophakic Eyes</p>

Cited by 9 publications

References 40 publications

Spectral Effects and Range of Focus in a Multizonal-Refractive Intraocular Lens Compared with a Standard Trifocal Diffractive Design

Spectral Effects and Range of Focus in a Multizonal-Refractive Intraocular Lens Compared with a Standard Trifocal Diffractive Design

Altering chromatic aberration: how this latest trend in intraocular-lens design affects visual quality in pseudophakic patients

Comparison of visual performance between two aspheric monofocal intraocular lens models

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