Equivalence of two optical quality metrics to predict the visual acuity of multifocal pseudophakic patients

Armengol, Jesús; Garzón, Nuria; Vega, F.; Altemir, Irene; Millán, Marı́a S.

doi:10.1364/boe.388531

Cited by 18 publications

(25 citation statements)

References 25 publications

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“…Studies on multifocal contact lenses ( Kawamorita and Uozato, 2005 ; Madrid-Costa et al, 2012 ; Fernández et al, 2019 ) found the similar results. MTFa was also used to predict VA and CS of multifocal intraocular lenses ( Vega et al, 2018 ; Armengol et al, 2020 ). In the current study, MTFs and MTFa showed that a concentric ring design impacted less visual performance than the honeycomb design.…”

Section: Discussionmentioning

confidence: 99%

“…Modulation transfer function ( Pieh et al, 2002 ; Son et al, 2017 ) has been widely used to quantify the optical quality of the lens design, and MTFa (modulation transfer function area) can be used to predict the VA and CS outcome ( Fernández et al, 2019 ; Armengol et al, 2020 ). In summary, to calculate MTF, one evaluates the complex amplitude in the pupil plane, then using fast Fourier transform (FFT) calculates the point spread function (PSF) and finally the MTF, using one center wavelength (λ = 550 nm) and assuming the pupil position directly on the glass ( Voelz, 2011 ).…”

Section: Methodsmentioning

confidence: 99%

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Influence of Lenslet Configuration on Short-Term Visual Performance in Myopia Control Spectacle Lenses

Xue

Ding

et al. 2021

Front. Neurosci.

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Purpose: This study aimed to evaluate short-term visual performance and optical quality of three different lenslet configurations on myopia control spectacle lenses.Materials and Methods: This study utilized a cross-over design. Distance visual acuity (VA) was measured in 50 myopic children; contrast sensitivity (CS) was measured in 36 myopic children. For each test, four spectacle lenses were evaluated in a random order: single-vision lens (SVL), lens with concentric rings of highly aspherical lenslets (HAL), lens with concentric rings of slightly aspherical lenslets (SAL), and lens with honeycomb configuration of spherical lenslets (HC). The modulation transfer function (MTF) and MTF area (MTFa) were used to determine optical quality. All tests were performed monocularly on the right eye with full correction.Results: HAL and SAL had larger MTFa than HC. VA in lenses with lenslets was significantly reduced compared to SVL (all p < 0.01). The reduction in VA was worse with HC than with SAL (p = 0.02) and HAL (p = 0.03); no effect of lenslet asphericity was found (p > 0.05). VA changes induced by lenslets showed no correlation with spherical equivalent refraction (all p > 0.05) and were weakly positively associated with age for SAL (r = 0.36, p = 0.01) and HC (r = 0.31, p = 0.03), but not for HAL (p = 0.30). The area under the log contrast sensitivity function (AULCSF) decreased with HAL and HC (all p < 0.001) in all illumination levels, and AULCSF with HAL was higher than that with HC in a photopic condition (1.17 ± 0.10 vs. 1.10 ± 0.13, p = 0.0004). The presence of lenslets did not affect CS at 3 cycles per degree (cpd) (p = 0.80). At 6 to 18 cpd, CS was significantly reduced by HAL and HC (all p < 0.05), but not SAL (p > 0.05) compared to SVL. At high spatial frequencies (>12 cpd) both SAL and HAL reduced CS significantly less than HC (all p < 0.01).Conclusion: Short-term visual performance was minimally impaired by looking through the lenslet structure of myopia control spectacle lenses. Concentric rings with aspherical lenslets had a significantly lower impact on both VA and CS than honeycomb configuration with spherical lenslets.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Influence of Lenslet Configuration on Short-Term Visual Performance in Myopia Control Spectacle Lenses

Xue

Ding

et al. 2021

Front. Neurosci.

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“…42 Further correlations between the polychromatic EE and clinical average VA of pseudophakic patients have been reported recently. 43 Suchkov et al 44 showed the influence of modifying LCA on VA, both experimentally and by simulation using a chromatic eye model. Although VA exhibits a robust response under modified chromatic conditions, the authors reported impairment in the predictability of the results with an LCA modified from natural conditions, as the experimental VA values were lower than the predicted.…”

Section: Discussionmentioning

confidence: 99%

Through-Focus Energy Efficiency and Longitudinal Chromatic Aberration of Three Presbyopia-Correcting Intraocular Lenses

Millán

Vega

2020

Trans. Vis. Sci. Tech.

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“… 25 In a study comparing the predictability of MTFa and LIB, both metrics demonstrated a strong correlation with clinical VA (MTFa, R 2 = 0.94; LIB, R 2 = 0.90). 26 However, the predictability of MTFa diminished more rapidly than LIB when increasing pupil size, indicating its sensitivity to pupil dependent aberrations. Further studies are needed to determine whether other optical parameters may have a similar effect on MTFa.…”

Section: Discussionmentioning

confidence: 95%

Metric-Based Visual Acuity and Defocus Curve Simulation of Two Multifocal Intraocular Lens Models

He¹,

Hong²,

Suryakumar³

et al. 2020

OPTH

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Purpose: To predict clinical defocus curve performance of the PanOptix intraocular lens (IOL) model TFNT00, a population-based image quality metric was applied to a pseudophakic eye model. Methods: Visual acuity (VA) was simulated using a 2-surface reduced eye model. For each virtual eye, the derived corneal surface was combined with scaled IOL surface. Corneal power and aberration, anterior chamber depth, and pupil size were iterated using a Monte-Carlo approach. Image quality of the IOLs was assessed using the total aberration map to compute the amplitude point spread function. A diffraction-normalized light-in-the-bucket metric was calculated for each virtual eye for defocuses from −3.5 D to +1.0 D (step size 0.25 D) and transformed to VAs and defocus curves. Simulated VA for the ReSTOR +3.0 D lens was used to generate a calibration function by linear regression correlation of simulated data with clinical VA data. Simulated TFNT00 VA was then validated by comparing defocus curves to clinical TFNT00 data. Results: From −3.5 D to +1.0 D, the simulated defocus curve was generally consistent with the defocus curve from the TFNT00 clinical trial. The mean absolute difference was 0.022 logMAR (~1 letter) for simulated VA versus clinical trial VA. Conclusion: IOL image quality can be assessed using a population-based virtual eye model to simulate VA and predict clinical performance. Computational modeling and simulation can be applied to future IOL development before clinical trials are conducted.

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Equivalence of two optical quality metrics to predict the visual acuity of multifocal pseudophakic patients

Cited by 18 publications

References 25 publications

Influence of Lenslet Configuration on Short-Term Visual Performance in Myopia Control Spectacle Lenses

Influence of Lenslet Configuration on Short-Term Visual Performance in Myopia Control Spectacle Lenses

Through-Focus Energy Efficiency and Longitudinal Chromatic Aberration of Three Presbyopia-Correcting Intraocular Lenses

Metric-Based Visual Acuity and Defocus Curve Simulation of Two Multifocal Intraocular Lens Models

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