Success rates in the correction of astigmatism with toric and spherical soft contact lens fittings

Sevda Aydin Kurna, Tomris Şeng&ouml;r, Murat &Uuml;n, Suat AkiFatih Sultan Mehmet Education and Research Hospital, Ophthalmology Clinics, lstanbul, TurkeyObjectives: To evaluate success rates in the correction of astigmatism with toric and spherical soft contact lens fitting.Methods:...

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Autores principales:	Sevda Aydin Kurna, Tomris Şeng&ouml;r, Murat &Uuml;n, et al
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2010
Materias:	Ophthalmology RE1-994
Acceso en línea:	https://doaj.org/article/ba64bbd057494859a3d583541662d327
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spelling	oai:doaj.org-article:ba64bbd057494859a3d583541662d3272021-12-02T04:39:58ZSuccess rates in the correction of astigmatism with toric and spherical soft contact lens fittings1177-54671177-5483https://doaj.org/article/ba64bbd057494859a3d583541662d3272010-08-01T00:00:00Zhttp://www.dovepress.com/success-rates-in-the-correction-of-astigmatism-with-toric-and-spherica-a5080https://doaj.org/toc/1177-5467https://doaj.org/toc/1177-5483Sevda Aydin Kurna, Tomris Şeng&ouml;r, Murat &Uuml;n, Suat AkiFatih Sultan Mehmet Education and Research Hospital, Ophthalmology Clinics, lstanbul, TurkeyObjectives: To evaluate success rates in the correction of astigmatism with toric and spherical soft contact lens fitting.Methods: 30 patients with soft toric lenses having more than 1.25 D of corneal astigmatism (25 eyes; Group A) or having 0.75&ndash;1.25 D of corneal astigmatism (22 eyes; Group B ) and 30 patients with soft spheric lenses having 0.75&ndash;1.25 D of corneal astigmatism (28 eyes; Group C) or less than 0.75 D of corneal astigmatism (23 eyes; Group D ) were included in the study. Corrected and uncorrected monocular visual acuity measurement with logMAR, biomicroscopic properties, autorefractometry and corneal topography were performed for all patients immediately before and at least 20 minutes after the application of contact lenses. &shy;Success of contact lens fitting was evaluated by three parameters: astigmatic neutralization, visual success, and retinal deviation.Results: After soft toric lens application, spheric dioptres, cylindric and keratometric astigmatism, and retinal deviation decreased significantly in Groups A and B (P &lt; 0.05). In Group C, spheric dioptres and retinal deviation decreased (P &lt; 0.05), while cylindric and keratometric astigmatism did not change significantly (P &gt; 0.05). In Group D, spheric dioptres, retinal deviation, and cylindric astigmatism decreased (P &lt; 0.05). Keratometric astigmatism did not change significantly (P &gt; 0.05) and astigmatic neutralization even increased.Conclusions: Visual acuity and residual spherical equivalent refraction remained between tolerable limits with the use of toric and spheric contact lenses. Spherical lenses failed to mask corneal toricity during topography, while toric lenses caused central neutralization and decrease in corneal cylinder in low and moderate astigmatic eyes.Keywords: astigmatism, soft toric lenses, soft spheric lenses, spherical equivalent refraction, surface topography Sevda Aydin KurnaTomris Şeng&ouml;rMurat &Uuml;net alDove Medical PressarticleOphthalmologyRE1-994ENClinical Ophthalmology, Vol 2010, Iss default, Pp 959-966 (2010)
institution	DOAJ
collection	DOAJ
language	EN
topic	Ophthalmology RE1-994
spellingShingle	Ophthalmology RE1-994 Sevda Aydin Kurna Tomris Şeng&ouml;r Murat &Uuml;n et al Success rates in the correction of astigmatism with toric and spherical soft contact lens fittings
description	Sevda Aydin Kurna, Tomris Şeng&ouml;r, Murat &Uuml;n, Suat AkiFatih Sultan Mehmet Education and Research Hospital, Ophthalmology Clinics, lstanbul, TurkeyObjectives: To evaluate success rates in the correction of astigmatism with toric and spherical soft contact lens fitting.Methods: 30 patients with soft toric lenses having more than 1.25 D of corneal astigmatism (25 eyes; Group A) or having 0.75&ndash;1.25 D of corneal astigmatism (22 eyes; Group B ) and 30 patients with soft spheric lenses having 0.75&ndash;1.25 D of corneal astigmatism (28 eyes; Group C) or less than 0.75 D of corneal astigmatism (23 eyes; Group D ) were included in the study. Corrected and uncorrected monocular visual acuity measurement with logMAR, biomicroscopic properties, autorefractometry and corneal topography were performed for all patients immediately before and at least 20 minutes after the application of contact lenses. &shy;Success of contact lens fitting was evaluated by three parameters: astigmatic neutralization, visual success, and retinal deviation.Results: After soft toric lens application, spheric dioptres, cylindric and keratometric astigmatism, and retinal deviation decreased significantly in Groups A and B (P &lt; 0.05). In Group C, spheric dioptres and retinal deviation decreased (P &lt; 0.05), while cylindric and keratometric astigmatism did not change significantly (P &gt; 0.05). In Group D, spheric dioptres, retinal deviation, and cylindric astigmatism decreased (P &lt; 0.05). Keratometric astigmatism did not change significantly (P &gt; 0.05) and astigmatic neutralization even increased.Conclusions: Visual acuity and residual spherical equivalent refraction remained between tolerable limits with the use of toric and spheric contact lenses. Spherical lenses failed to mask corneal toricity during topography, while toric lenses caused central neutralization and decrease in corneal cylinder in low and moderate astigmatic eyes.Keywords: astigmatism, soft toric lenses, soft spheric lenses, spherical equivalent refraction, surface topography
format	article
author	Sevda Aydin Kurna Tomris Şeng&ouml;r Murat &Uuml;n et al
author_facet	Sevda Aydin Kurna Tomris Şeng&ouml;r Murat &Uuml;n et al
author_sort	Sevda Aydin Kurna
title	Success rates in the correction of astigmatism with toric and spherical soft contact lens fittings
title_short	Success rates in the correction of astigmatism with toric and spherical soft contact lens fittings
title_full	Success rates in the correction of astigmatism with toric and spherical soft contact lens fittings
title_fullStr	Success rates in the correction of astigmatism with toric and spherical soft contact lens fittings
title_full_unstemmed	Success rates in the correction of astigmatism with toric and spherical soft contact lens fittings
title_sort	success rates in the correction of astigmatism with toric and spherical soft contact lens fittings
publisher	Dove Medical Press
publishDate	2010
url	https://doaj.org/article/ba64bbd057494859a3d583541662d327
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Success rates in the correction of astigmatism with toric and spherical soft contact lens fittings

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