Comparing Visual Acuity, Low Contrast Acuity and Refractive Error After Implantation of a Low Cylinder Power Toric Intraocular Lens or a Non-Toric Intraocular Lens

Comparing Visual Acuity, Low Contrast Acuity and Refractive Error After Implantation of a Low Cylinder Power Toric Intraocular Lens or a Non-Toric Intraocular Lens

Kjell Gunnar Gundersen,1 Richard Potvin2 1iFocus Øyeklinikk AS, Haugesund, Norway; 2Science in Vision, Bend, OR, USACorrespondence: Kjell Gunnar GunderseniFocus Øyeklinikk AS, Sørhauggata 111, Haugesund 5527, NorwayTel +47 52808902Email kg@ifocus.noPurpose: To compar...

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Autores principales: Gundersen KG, Potvin R
Formato: article
Lenguaje:EN
Publicado: Dove Medical Press 2020
Materias:
toric iol
low cylinder
low contrast acuity
astigmatism correction
Ophthalmology
RE1-994
Acceso en línea:https://doaj.org/article/80f59e3d6dee4d78a7df18a070a76212
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spelling oai:doaj.org-article:80f59e3d6dee4d78a7df18a070a762122021-12-02T11:38:57ZComparing Visual Acuity, Low Contrast Acuity and Refractive Error After Implantation of a Low Cylinder Power Toric Intraocular Lens or a Non-Toric Intraocular Lens1177-5483https://doaj.org/article/80f59e3d6dee4d78a7df18a070a762122020-10-01T00:00:00Zhttps://www.dovepress.com/comparing-visual-acuity-low-contrast-acuity-and-refractive-error-after-peer-reviewed-article-OPTHhttps://doaj.org/toc/1177-5483Kjell Gunnar Gundersen,1 Richard Potvin2 1iFocus Øyeklinikk AS, Haugesund, Norway; 2Science in Vision, Bend, OR, USACorrespondence: Kjell Gunnar GunderseniFocus Øyeklinikk AS, Sørhauggata 111, Haugesund 5527, NorwayTel +47 52808902Email kg@ifocus.noPurpose: To compare uncorrected and best-corrected visual acuity, low contrast acuity, residual refraction and ocular biometry after low cylinder power toric intraocular lens (IOL) or non-toric IOL implantation.Patients and Methods: This was a non-interventional comparative study of visual outcomes after uncomplicated cataract or refractive lens exchange surgery with either a low cylinder (Low_Cyl) or non-toric (Non_Toric) IOL of similar design implanted (AcrySof® T2 IQ Toric IOL and AcrySof® IQ IOL). Subjects in both groups had to have been eligible for the low cylinder IOL based on biometry. They had to have uncorrected distance visual acuity (UDVA) of 20/32 (0.2 logMAR) or better at the time of their single diagnostic study visit. Clinical evaluation included the manifest refraction, visual acuity (VA), low contrast VA and ocular biometry.Results: A total of 94 eyes were enrolled, 51 Low_Cyl and 43 Non_Toric. The mean manifest refractive cylinder was statistically significantly lower (∼ 0.25 D) in the Low_Toric group (p < 0.01) and significantly more eyes had 0.25 D or less of refractive cylinder in that group (p = 0.03). The orientation of the preoperative anterior corneal astigmatism was a significant cofactor, with the difference between groups more evident when astigmatism was against the rule. Uncorrected high contrast visual acuity was statistically significantly better in the Low_Toric group (p = 0.02) as was the percentage of eyes with 20/20 visual acuity (p = 0.05). Uncorrected low contrast visual acuity was not statistically significantly different in mesopic or photopic conditions.Conclusion: The low cylinder power toric IOL provided better uncorrected visual acuity and lower residual refractive cylinder than a similar non-toric IOL after cataract surgery.Keywords: toric IOL, low cylinder, low contrast acuity, astigmatism correctionGundersen KGPotvin RDove Medical Pressarticletoric iollow cylinderlow contrast acuityastigmatism correctionOphthalmologyRE1-994ENClinical Ophthalmology, Vol Volume 14, Pp 3661-3666 (2020)
institution DOAJ
collection DOAJ
language EN
topic toric iol
low cylinder
low contrast acuity
astigmatism correction
Ophthalmology
RE1-994
spellingShingle toric iol
low cylinder
low contrast acuity
astigmatism correction
Ophthalmology
RE1-994
Gundersen KG
Potvin R
Comparing Visual Acuity, Low Contrast Acuity and Refractive Error After Implantation of a Low Cylinder Power Toric Intraocular Lens or a Non-Toric Intraocular Lens
description Kjell Gunnar Gundersen,1 Richard Potvin2 1iFocus Øyeklinikk AS, Haugesund, Norway; 2Science in Vision, Bend, OR, USACorrespondence: Kjell Gunnar GunderseniFocus Øyeklinikk AS, Sørhauggata 111, Haugesund 5527, NorwayTel +47 52808902Email kg@ifocus.noPurpose: To compare uncorrected and best-corrected visual acuity, low contrast acuity, residual refraction and ocular biometry after low cylinder power toric intraocular lens (IOL) or non-toric IOL implantation.Patients and Methods: This was a non-interventional comparative study of visual outcomes after uncomplicated cataract or refractive lens exchange surgery with either a low cylinder (Low_Cyl) or non-toric (Non_Toric) IOL of similar design implanted (AcrySof® T2 IQ Toric IOL and AcrySof® IQ IOL). Subjects in both groups had to have been eligible for the low cylinder IOL based on biometry. They had to have uncorrected distance visual acuity (UDVA) of 20/32 (0.2 logMAR) or better at the time of their single diagnostic study visit. Clinical evaluation included the manifest refraction, visual acuity (VA), low contrast VA and ocular biometry.Results: A total of 94 eyes were enrolled, 51 Low_Cyl and 43 Non_Toric. The mean manifest refractive cylinder was statistically significantly lower (∼ 0.25 D) in the Low_Toric group (p < 0.01) and significantly more eyes had 0.25 D or less of refractive cylinder in that group (p = 0.03). The orientation of the preoperative anterior corneal astigmatism was a significant cofactor, with the difference between groups more evident when astigmatism was against the rule. Uncorrected high contrast visual acuity was statistically significantly better in the Low_Toric group (p = 0.02) as was the percentage of eyes with 20/20 visual acuity (p = 0.05). Uncorrected low contrast visual acuity was not statistically significantly different in mesopic or photopic conditions.Conclusion: The low cylinder power toric IOL provided better uncorrected visual acuity and lower residual refractive cylinder than a similar non-toric IOL after cataract surgery.Keywords: toric IOL, low cylinder, low contrast acuity, astigmatism correction
format article
author Gundersen KG
Potvin R
author_facet Gundersen KG
Potvin R
author_sort Gundersen KG
title Comparing Visual Acuity, Low Contrast Acuity and Refractive Error After Implantation of a Low Cylinder Power Toric Intraocular Lens or a Non-Toric Intraocular Lens
title_short Comparing Visual Acuity, Low Contrast Acuity and Refractive Error After Implantation of a Low Cylinder Power Toric Intraocular Lens or a Non-Toric Intraocular Lens
title_full Comparing Visual Acuity, Low Contrast Acuity and Refractive Error After Implantation of a Low Cylinder Power Toric Intraocular Lens or a Non-Toric Intraocular Lens
title_fullStr Comparing Visual Acuity, Low Contrast Acuity and Refractive Error After Implantation of a Low Cylinder Power Toric Intraocular Lens or a Non-Toric Intraocular Lens
title_full_unstemmed Comparing Visual Acuity, Low Contrast Acuity and Refractive Error After Implantation of a Low Cylinder Power Toric Intraocular Lens or a Non-Toric Intraocular Lens
title_sort comparing visual acuity, low contrast acuity and refractive error after implantation of a low cylinder power toric intraocular lens or a non-toric intraocular lens
publisher Dove Medical Press
publishDate 2020
url https://doaj.org/article/80f59e3d6dee4d78a7df18a070a76212
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