Qualité de vision étudiée par mesure comparative de la diffusion de la lumière

Rzemyk, V.; Cochener, Béatrice

doi:10.1016/j.jfo.2014.01.006

Cited by 6 publications

(6 citation statements)

References 34 publications

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“…Similarly, we found moderate to strong correlations between OSI and different components of LOCS III. Again, variations exist with previous studies which found stronger [21] or weaker correlations [50,54,56] probably because of differences in spectrum of cataract severity.…”

Section: Plos Onecontrasting

confidence: 72%

“…Our population sample was representative of general French population who undergo cataract surgery [4]. Even if BCVA may be less considered now, as the latest recommendations not include it in surgery decision-making, our mean BCVA respected the previous cutoff established by the competent Health Authorities, like Hwang et al [53], or contrary to some studies evaluating the OQAS on patients with lower preoperative logMAR BCVA at earlier stages agerelated cataract [21,49,50,[54][55][56].…”

Section: Discussionmentioning

confidence: 83%

“…As cortical components cause disability in daily life without necessarily greatly impairing visual acuity [57,62], we chose to consider every type of cataract (N/C/P) for both population selection and LOCS III grading, to prevent potential bias: Artal et al [40] did not consider this point in selecting their population, and mentioned it as a limitation. Other authors analyzed correlations for nuclear cataracts only [50], or considered all components as nuclear cataracts, judging that other types of cataracts were poorly represented in their study [54].…”

Section: Plos Onementioning

confidence: 99%

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Using Optical Quality Analysis System for predicting surgical parameters in age-related cataract patients

et al. 2020

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The Optical Quality Analysis System (OQAS, Visiometrics) provides objective measurements of image formed onto retina, by combining quantification of ocular media transparency and of optical aberrations. In order to evaluate its contribution in the assessment of age-related cataract, we conducted a monocentric clinical study to determine the relationships between clinical grading of lens opacity, OQAS parameters, and parameters required for cataract surgery by phacoemulsification with ultrasound (called "phacodynamics"). Clinical parameters were: best-corrected visual acuity (BCVA, expressed as Log of minimal angle resolution (logMAR)) and the lens opacity classification system III (LOCS III) as a gold standard determined by two independent observers who graded total cataract and nuclear, cortical and posterior sub capsular components. The OQAS provided an objective scatter index (OSI), a modulation transfer function (MTF, expressed in cycle per degree (cpd)) and a Strehl ratio (SR) used as an aberration marker. Patients were operated on by the same surgeon using a phacoemulsification machine that provided the cumulative dissipated energy (CDE) and total ultrasound time (US time) necessary to extract the lens. Patients with poor compliance, corneal or retinal diseases impairing OSI, or who required surgical settings variation, were excluded. Twenty-one eyes of 21 patients aged 76±8 years were analyzed. They were 11 pure nuclear, 3 pure cortical, and 7 mixed cataracts. Mean LOCS III and OSI were respectively: 4.86 ±2.03 and 6.12 ±3.07 (mean±SD). Medians (10˚-90˚percentiles) were: for BCVA 0.30 (0.10-0.70) logMAR, for MTF cutoff 9.31 (1.54-30.57) cpd, for SR 0.071 (0.042-0.146), for CDE 8.04 (5.74-23.29) and for US time 58 (39-116) seconds. LOCS III was significantly correlated (spearman r, r s) with BCVA (r s = 0.561, p = 0.008), CDE (r s = 0.457, p = 0.038) and US time (r s = 0.647, p = 0.002). The three OQAS parameters significantly correlated (all r s � 0.526, p<0.05) with BCVA, and LOCS III grading, but the strongest correlations were found with OSI for cortical components and with MTF for nuclear components: only OSI may be used objectively to assess the effect of cortical components on optical quality, and MTF cutoff-integrating scattering and aberrationsseems the best objective parameter for clinical assessment of nuclear cataracts. The three OQAS parameters were also significantly correlated (r s) with CDE, and with US time only for

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Section: Plos Onecontrasting

confidence: 72%

Section: Discussionmentioning

confidence: 83%

Section: Plos Onementioning

confidence: 99%

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Using Optical Quality Analysis System for predicting surgical parameters in age-related cataract patients

et al. 2020

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“…High-contrast visual acuity is no longer sufficient for the qualitative assessment of visual function [1,2]. Instead, nowadays, the objective assessment of optical quality has taken over with the development of user-friendly devices.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Effects of Vitrectomy with Primary Epiretinal Membrane Peel on Optical Quality Using Double-Pass Aberrometry

Varenne¹,

Malecaze

Mahieu

et al. 2022

Ophthalmic Res

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Introduction: We performed a prospective, single-center, cohort study in order to evaluate the effects of vitrectomy with epiretinal membrane (ERM) peel on optical quality in patients with primary ERM. Methods: Thirty patients treated for primary ERM by vitrectomy with ERM peel were included from our tertiary university hospital ophthalmology department. The main study outcome was variation in optical quality parameters measured using the HD Analyzer™ between pre-operative and two-month post-operative evaluations in operated eyes. Optical quality parameters comprised point spread function (PSF) width at 10% and 50%, objective scatter index (OSI), and modulation transfer function (MTF) cutoff. Contralateral non-operated eyes were used as an internal control for measurement reproducibility. Results: Mean PSF width at 10% (42.22 vs 27.37 arc/min; p = 0.0002) and mean OSI (3.32 vs 2.32; p = 0.0003) were significantly improved between pre- versus post-operative evaluations. Mean PSF width at 50% and mean MTF cutoff showed no changes. Subgroup analysis according to crystalline lens status gave similar results demonstrating that improvements in mean PSF width at 10% and OSI were not lens-related. Non-operated eyes showed no changes in any of the parameters analyzed. Conclusion: Reduced light scattering measured by OSI indicates improved optical quality following vitrectomy with ERM peel among patients with primary ERM. OSI measurement could thus be a new parameter of interest in the pre-operative assessment of primary ERM and other pre-vitrectomy assessments.

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“…Excess intraocular light diffusion causes significant glare which can be quantified by the objective scatter index (OSI), measured by “double-pass” aberrometry [ 32 ]. The greater the level of intraocular light scattering, the higher the level of OSI.…”

Section: Introductionmentioning

confidence: 99%

The assessment of the impact of glistening on visual performance in relation to tear film quality

Argay

Vámosi

2020

PLoS ONE

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Background The aim of our case control study was to evaluate the impact of glistening and tear film quality on visual performance after implantation of two different hydrophobic acrylic intraocular lenses (IOLs). Materials and methods In our retrospective study we included cataract patients operated between January 1, 2011 and December 31, 2012, with follow-up controls between January 2016 and December 2019. Z-Flex 860FAB (Medicontur) and AcrySof IQ SN60WF (Alcon) monofocal IOLs were implanted during standard phacoemulsification. Best corrected distance visual acuity (BCDVA) and contrast sensitivity were monitored over the post-operative period of up to 6 years. Glistening was evaluated semi-quantitatively with slit-lamp biomicroscopy and quantitatively using Pentacam HR (Oculus). Using HD Analyzer OQAS (Visiometrics), total intraocular light diffusion was interpreted with the objective scatter index (OSI) and tear film quality was evaluated with the tear film related objective scatter index (TF-OSI). Results 26 eyes implanted with the Z-Flex and 25 eyes with the AcrySof IQ IOLs were included in the analysis. The slit-lamp evaluation of patients with the Z-Flex IOL (0.57 ± 0.60) revealed significantly less glistening (p<0.0001), compared to the AcrySof IQ group (1.82 ± 0.90), and these observations were confirmed by the Pentacam HR analyses, as well (Z-Flex group: 35.1 ± 1.63, Acrysof IQ: 39.6 ± 3.69, p<0.0001). TF-OSI differed between the two sets of patients remarkably (1.53 ± 1.03 vs. 2.51 ± 1.76 for AcrySof IQ and Z-Flex groups, respectively, p = 0.043). Both groups of patients provided similar results of BCDVA and contrast sensitivity. Conclusion Glistening and tear film quality both contribute to visual performance outcomes after cataract surgery. In our study the advantage of less glistening in the Z-Flex IOL might have been

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Qualité de vision étudiée par mesure comparative de la diffusion de la lumière

Cited by 6 publications

References 34 publications

Using Optical Quality Analysis System for predicting surgical parameters in age-related cataract patients

Using Optical Quality Analysis System for predicting surgical parameters in age-related cataract patients

Evaluation of the Effects of Vitrectomy with Primary Epiretinal Membrane Peel on Optical Quality Using Double-Pass Aberrometry

The assessment of the impact of glistening on visual performance in relation to tear film quality

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