Initial Experience With a New Refractive Rotationally Asymmetric Multifocal Intraocular Lens

Venter, Jan A.; Barclay, D.; Pelouskova, Martina; Bull, Claire E L

doi:10.3928/1081597x-20141021-09

Cited by 45 publications

(34 citation statements)

References 23 publications

(61 reference statements)

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“…Interestingly, these findings are consistent with previous studies that found a good range for intermediate vision with SBL-3 [15,25]. is fact may be attributed to either the smooth optical transition zone between the two areas of the MIOL or some introduction of aberration with this design, providing a larger depth of foci [26]. e RMS of intraocular aberrations, intraocular HOAs, coma, and trefoil aberrations was significantly greater in the SBL-3 group than in the SN6AD1 group in our study.…”

Section: Discussionsupporting

confidence: 92%

“…ere was no statistically significant difference in mean scores between the two groups. A previous study [26] indicated that the overall satisfaction of patients with SBL-3 was high despite some night vision phenomena. However, SBL-3 appeared to provide a better range of visual acuity but had blur vision at distance and near subjects compared to that of SN6AD1 due to the introduction of much undesired intraocular aberrations.…”

Section: Discussionmentioning

confidence: 93%

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Comparative Analysis of Visual Performance and Optical Quality with a Rotationally Asymmetric Multifocal Intraocular Lens and an Apodized Diffractive Multifocal Intraocular Lens

Wang

2020

Journal of Ophthalmology

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Purpose. To compare the short-term visual outcomes and intraocular optical performance of a rotationally asymmetric multifocal intraocular lens (MIOL) (SBL-3, Lenstec, Inc., Christ Church, Barbados) and an apodized diffractive MIOL (the Acrysof IQ ResTOR SN6AD1, Alcon Laboratories, Inc., Fort Worth, Texas, United States). Methods. A prospective, comparative, nonrandomized, and single-center study. Sixty-eight age-related cataract patients (81 eyes) after phacoemulsification cataract surgery and in-the-bag MIOL implantation were enrolled. Thirty-eight eyes received SBL-3, and 43 eyes received SN6AD1. Ophthalmological evaluation included uncorrected distance visual acuity (UDVA), uncorrected intermediate visual acuity (UIVA), uncorrected near visual acuity (UNVA), corrected distance visual acuity (CDVA), modulation transfer function (MTF), Strehl ratio (SR), intraocular aberrations (4 mm optical zone), and defocus curve at 3 months postoperatively. The Chinese version of the visual function index-14 (VF-12-CN) and spectacle independence were assessed in all patients. Results. There was no statistically significant difference between groups in postoperative UDVA (p=0.186). Postoperative UIVA and UNVA were significantly better for the SBL-3 group than for the SN6AD1 group (p<0.01). Statistically significant differences were revealed in defocus levels from –3.50 D to −4.00 D with better visual acuities for the SBL-3 group (p<0.01). For intraocular optical quality outcomes, statistically significant differences between groups were observed in RMS of intraocular total aberrations, coma, and trefoil high-order aberrations, presenting significantly higher values of these parameters in the eyes of the SBL-3 group (p < 0.01). Statistically significant differences were revealed in the MTF values at spatial frequencies of 5 and 10 cycles/degree between groups. There were no significant differences in scores of VF-12-CN, and spectacle independence between the groups (p>0.05). Conclusions. Both MIOLs were able to successfully restore visual function after cataract surgery. SBL-3 provided better UIVA and UNVA with a wider range of intermediate vision.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 93%

Comparative Analysis of Visual Performance and Optical Quality with a Rotationally Asymmetric Multifocal Intraocular Lens and an Apodized Diffractive Multifocal Intraocular Lens

Wang

2020

Journal of Ophthalmology

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“…Asymmetric IOL designs have also been more recently introduced and provide good vision from distance to near, with contrast sensitivity clinically equivalent to monofocal IOL implantation, generally with less dysphotopsia than similar near powered concentric multifocal IOL designs (Moore et al, 2017;Venter et al, 2014). Smaller pupils have been shown to have a significant negative impact on subjectively reported quality of vision with asymmetric IOLs (Pazo et al, 2017).…”

Section: Multifocal Iolsmentioning

confidence: 99%

Presbyopia: Effectiveness of correction strategies

Wolffsohn

Davies

2019

Progress in Retinal and Eye Research

191

176

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Presbyopia is a global problem affecting over a billion people worldwide. The prevalence of unmanaged presbyopia is as high as 50% of those over 50 years of age in developing world populations, due to a lack of awareness and accessibility to affordable treatment, and is even as high as 34% in developed countries. Definitions of presbyopia are inconsistent and varied, so we propose a redefinition that states "presbyopia occurs when the physiologically normal age-related reduction in the eye's focusing range reaches a point, when optimally corrected for distance vision, that the clarity of vision at near is insufficient to satisfy an individual's requirements". Strategies for correcting presbyopia include separate optical devices located in front of the visual system (reading glasses) or a change in the direction of gaze to view through optical zones of different optical powers (bifocal, trifocal or progressive addition spectacle lenses), monovision (with contact lenses, intraocular lenses, laser refractive surgery and corneal collagen shrinkage), simultaneous images (with contact lenses, intraocular lenses and corneal inlays), pinhole depth of focus expansion (with intraocular lenses, corneal inlays and pharmaceuticals), crystalline lens softening (with lasers or pharmaceuticals) or restored dynamics (with 'accommodating' intraocular lenses, scleral expansion techniques and ciliary muscle electrostimulation); these strategies may be applied differently to the two eyes to optimise the range of clear focus for an individual's task requirements and minimise adverse visual effects. However, none fully overcome presbyopia in all patients. While the restoration of natural accommodation or an equivalent remains elusive, guidance is given on presbyopic correction evaluation techniques.

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“…Commercial solutions are already available in the form of contact lenses (e.g. Gelflex Linear Plus Bifocal, PureSite Revision SSG) and intraocular lenses (i.e., M‐plus family from Oculentis, Berlin, Germany and the Lenstec SBL‐3 from Lenstec, Inc., Christ Church, Barbados) . However, although very recent studies have explored the preference of orientation under monocular vision in small samples of subjects, there is no quantitative assessment of the impact of orientation of angular multifocals on the achieved binocular performance.…”

Section: Discussionmentioning

confidence: 99%

Optimal orientation for angularly segmented multifocal corrections

Gracia

Hartwig²

2017

Ophthalmic Physiologic Optic

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Initial Experience With a New Refractive Rotationally Asymmetric Multifocal Intraocular Lens

Abstract: The new refractive rotationally asymmetric intraocular lens provided good range of vision for near, intermediate, and distance. Long-term follow-ups are necessary to evaluate the performance of this intraocular lens.

Cited by 45 publications

References 23 publications

Comparative Analysis of Visual Performance and Optical Quality with a Rotationally Asymmetric Multifocal Intraocular Lens and an Apodized Diffractive Multifocal Intraocular Lens

Comparative Analysis of Visual Performance and Optical Quality with a Rotationally Asymmetric Multifocal Intraocular Lens and an Apodized Diffractive Multifocal Intraocular Lens

Presbyopia: Effectiveness of correction strategies

Optimal orientation for angularly segmented multifocal corrections

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