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Auteur Hannah R. Gregory
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Ajouter le résultat dans votre panier Affiner la rechercheContrast Sensitivity with Center-distance Multifocal Soft Contact Lenses / Augustine N. Nti in OVS : Optometry & Vision Science, vol. 99, 04 (Avril 2022)
[article]
in OVS : Optometry & Vision Science > vol. 99, 04 (Avril 2022)
Titre : Contrast Sensitivity with Center-distance Multifocal Soft Contact Lenses Type de document : article de périodique Auteurs : Augustine N. Nti ; Hannah R. Gregory ; Eric R. Ritchey ; James S. Wolffsohn ; David A. Berntsen Année de publication : 2022 Langues : Français (fre) Descripteurs (mots clés) : [Thésaurus Mesh]Lentilles de contact hydrophiles
[Thésaurus Mesh]Myopie
[Thésaurus Mesh]Sensibilité au contrasteMots-clés : lentilles de contact souples multifocales à distance centrale Résumé : SIGNIFICANCE: The contrast sensitivity (CS) function provides a more detailed assessment of vision than visual
acuity. It was found that center-distance multifocal contact lens designs that are increasingly being prescribed
for myopia control reduce distance photopic and mesopic CS in nonpresbyopic patients across a range of spatial
frequencies.
PURPOSE: This study aimed to determine the effect of center-distance multifocal soft contact lenses (MFCLs) on
CS under photopic and mesopic conditions in nonpresbyopic patients.
METHODS: Twenty-five myopic, nonpresbyopic adults were fitted binocularly with three lenses: Biofinity single vision
contact lens (SVCL), Biofinity Multifocal D +2.50 add, and NaturalVue Multifocal in random order. Contrast sensitivity was measured at distance (4 m) under photopic and mesopic conditions and at near under photopic conditions. Log CS by spatial frequency and area under the log contrast sensitivity function (AULCSF) were analyzed between lenses.
RESULTS: Distance photopic CS at each spatial frequency was higher with the SVCL than the MFCLs ( P < .001),
but there was no difference between the MFCLs ( P = .71). Distance mesopic CS from 1.5 to 12 cycles per degree
(cpd) was higher with the SVCL than the MFCLs (all P < .02); however, at 18 cpd, there was no difference in CS
between NaturalVue and the SVCL (P = .76), possibly because of spurious resolution. Photopic AULCSF for the SVCL
was roughly 10% greater than both MFCLs. Contrast sensitivity at near was generally similar between lenses, only slightly
lower with the NaturalVue at 11 and 15.5 cpd, but AULCSF at near was not different between lenses ( P > .05).
CONCLUSIONS: Multifocal contact lenses reduce distance contrast sensitivity under both photopic and mesopic
conditions. There is no clinically significant difference in near CS among all three lenses. These data show that
MFCLs have effects on vision that are not captured by standard high-contrast visual acuity testing.Permalink : https://bibliotheque.helb-prigogine.be/opac_css/index.php?lvl=notice_display&id= [article]Exemplaires
Cote Support Localisation Section Disponibilité aucun exemplaire Visual Performance of Center-distance Multifocal Contact Lenses Fit Using a Myopia Control Paradigm / Hannah R. Gregory in OVS : Optometry & Vision Science, vol. 98, 03 (Mars 2021)
[article]
in OVS : Optometry & Vision Science > vol. 98, 03 (Mars 2021)
Titre : Visual Performance of Center-distance Multifocal Contact Lenses Fit Using a Myopia Control Paradigm Type de document : article de périodique Auteurs : Hannah R. Gregory ; Augustine N. Nti ; James S. Wolffsohn ; David A. Berntsen ; Eric R. Ritchey Année de publication : 2021 Langues : Français (fre) Descripteurs (mots clés) : [Thésaurus Mesh]:M:Myopie:Myopie / thérapie
[Thésaurus Mesh]Acuité visuelle
[Thésaurus Mesh]Lentilles de contact
[Thésaurus Mesh]Myopie
[Thésaurus HELB]:Optique:Lentilles multifocalesRésumé : SIGNIFICANCE: With multifocal contact lenses (MFCLs) used for myopia control, questions remain regarding visual performance. Information from nonpresbyopic patients provides insight into how MFCLs affect visual acuity
and reading performance.
PURPOSE: The purpose of this study was to examine the visual performance of center-distance MFCLs in
nonpresbyopic adults under different illumination and contrast conditions compared with a single-vision contact
lens (SVCL).
METHODS: Twenty-five adult subjects were fit with three different lenses (CooperVision Biofinity D MFCL +2.50
add, Visioneering Technologies NaturalVue MFCL, CooperVision Biofinity sphere). Acuity and reading performance
were evaluated.
RESULTS: A statistically significant difference in high-contrast distance acuity was observed (Biofinity, −0.18 ± 0.06;
Biofinity MFCL, −0.14 ± 0.08; NaturalVue MFCL, −0.15 ± 0.03; repeated-measures [RM] ANOVA, P = .02). Under
mesopic, high-contrast conditions, MFCLs performed worse than SVCLs (Biofinity, −0.05 ± 0.091; Biofinity MFCL,
+0.03 ± 0.09; NaturalVue MFCL, +0.05 ± 0.091; RM-ANOVA, P < .0001). Under low-contrast conditions, MFCLs performed one line worse in photopic lighting and two lines worse under mesopic conditions (RM-ANOVA, P < .0001).
Glare reduced acuity by 0.5 logMAR for all lenses (RM-ANOVA, P < .001). A statistically significant difference in near
acuity was observed (RM-ANOVA, P = .02), but all lenses achieved acuity better than −0.1 logMAR (Biofinity,
−0.16 ± 0.06; Biofinity MFCL, −0.17 ± 0.04; NaturalVue MFCL, −0.13 ± 0.08). Reading performance in words per
minute (wpm) was worse with MFCLs (Biofinity MFCL, 144 ± 22 wpm; NaturalVue MFCL, 150 ± 28 wpm) than with
SVCLs (156 ± 23 wpm; RM-ANOVA, P = .02) regardless of letter size (RM-ANOVA, P = .13). No difference in acuity
between the MFCLs was detected (RM-ANOVA: all, P > .05).
CONCLUSIONS: Multifocal contact lenses perform similarly to SVCLs for high-contrast targets and display reduced
low-contrast acuity and reading speed. Practitioners should recognize that high-contrast acuity alone does not describe MFCL visual performance.
Optom Vis Sci 2021;98:272–279. dNote de contenu :
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