High Dk piggyback contact lens system for contact lens-intolerant keratoconus patients

Tomris Sengor, Sevda Aydin Kurna, Suat Aki, Yelda &Ouml;zkurtFatih Sultan Mehmet Training and Research Hospital, Istanbul, TurkeyBackground: The aim of the study was to examine the clinical success of high Dk (oxygen permeability) piggyback contact lens (PBCL) systems for the correction of c...

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Autores principales:	Tomris Sengor, Sevda Aydin Kurna, Suat Aki, et al
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2011
Materias:	Ophthalmology RE1-994
Acceso en línea:	https://doaj.org/article/49a99e6e9ab64d08ae5d759df0d3b2ec
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spelling	oai:doaj.org-article:49a99e6e9ab64d08ae5d759df0d3b2ec2021-12-02T00:34:53ZHigh Dk piggyback contact lens system for contact lens-intolerant keratoconus patients1177-54671177-5483https://doaj.org/article/49a99e6e9ab64d08ae5d759df0d3b2ec2011-03-01T00:00:00Zhttp://www.dovepress.com/high-dk-piggyback-contact-lens-system-for-contact-lens-intolerant-kera-a6553https://doaj.org/toc/1177-5467https://doaj.org/toc/1177-5483Tomris Sengor, Sevda Aydin Kurna, Suat Aki, Yelda &Ouml;zkurtFatih Sultan Mehmet Training and Research Hospital, Istanbul, TurkeyBackground: The aim of the study was to examine the clinical success of high Dk (oxygen permeability) piggyback contact lens (PBCL) systems for the correction of contact lens intolerant keratoconus patients.Methods: Sixteen patients (29 eyes) who were not able to wear gas-permeable rigid lenses were included in this study. Hyper Dk silicone hydrogel (oxygen transmissibility or Dk/t = 150 units) and fluorosilicone methacrylate copolymer (Dk/t = 100 units) lenses were chosen as the PBCL systems. The clinical examinations included visual acuity and corneal observation by biomicroscopy, keratometer reading, and fluorescein staining before and after fitting the PBCL system.Results: Indications for using PBCL system were: lens stabilization and comfort, improving comfort, and adding protection to the cone. Visual acuities increased significantly in all of the patients compared with spectacles (P = 0). Improvement in visual acuity compared with rigid lenses alone was recorded in 89.7% of eyes and no alteration of the visual acuity was observed in 10.3% of the eyes. Wearing time of PBCL systems for most of the patients was limited time (mean 6 months, range 3&ndash;12 months); thereafter they tolerated rigid lenses alone except for 2 patients.Conclusion: The PBCL system is a safe and effective method to provide centering and corneal protection against mechanical trauma by the rigid lenses for keratoconus patients and may increase contact lens tolerance.Keywords: piggyback contact lens, keratoconus, irregular astigmatism Tomris SengorSevda Aydin KurnaSuat Akiet alDove Medical PressarticleOphthalmologyRE1-994ENClinical Ophthalmology, Vol 2011, Iss default, Pp 331-335 (2011)
institution	DOAJ
collection	DOAJ
language	EN
topic	Ophthalmology RE1-994
spellingShingle	Ophthalmology RE1-994 Tomris Sengor Sevda Aydin Kurna Suat Aki et al High Dk piggyback contact lens system for contact lens-intolerant keratoconus patients
description	Tomris Sengor, Sevda Aydin Kurna, Suat Aki, Yelda &Ouml;zkurtFatih Sultan Mehmet Training and Research Hospital, Istanbul, TurkeyBackground: The aim of the study was to examine the clinical success of high Dk (oxygen permeability) piggyback contact lens (PBCL) systems for the correction of contact lens intolerant keratoconus patients.Methods: Sixteen patients (29 eyes) who were not able to wear gas-permeable rigid lenses were included in this study. Hyper Dk silicone hydrogel (oxygen transmissibility or Dk/t = 150 units) and fluorosilicone methacrylate copolymer (Dk/t = 100 units) lenses were chosen as the PBCL systems. The clinical examinations included visual acuity and corneal observation by biomicroscopy, keratometer reading, and fluorescein staining before and after fitting the PBCL system.Results: Indications for using PBCL system were: lens stabilization and comfort, improving comfort, and adding protection to the cone. Visual acuities increased significantly in all of the patients compared with spectacles (P = 0). Improvement in visual acuity compared with rigid lenses alone was recorded in 89.7% of eyes and no alteration of the visual acuity was observed in 10.3% of the eyes. Wearing time of PBCL systems for most of the patients was limited time (mean 6 months, range 3&ndash;12 months); thereafter they tolerated rigid lenses alone except for 2 patients.Conclusion: The PBCL system is a safe and effective method to provide centering and corneal protection against mechanical trauma by the rigid lenses for keratoconus patients and may increase contact lens tolerance.Keywords: piggyback contact lens, keratoconus, irregular astigmatism
format	article
author	Tomris Sengor Sevda Aydin Kurna Suat Aki et al
author_facet	Tomris Sengor Sevda Aydin Kurna Suat Aki et al
author_sort	Tomris Sengor
title	High Dk piggyback contact lens system for contact lens-intolerant keratoconus patients
title_short	High Dk piggyback contact lens system for contact lens-intolerant keratoconus patients
title_full	High Dk piggyback contact lens system for contact lens-intolerant keratoconus patients
title_fullStr	High Dk piggyback contact lens system for contact lens-intolerant keratoconus patients
title_full_unstemmed	High Dk piggyback contact lens system for contact lens-intolerant keratoconus patients
title_sort	high dk piggyback contact lens system for contact lens-intolerant keratoconus patients
publisher	Dove Medical Press
publishDate	2011
url	https://doaj.org/article/49a99e6e9ab64d08ae5d759df0d3b2ec
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High Dk piggyback contact lens system for contact lens-intolerant keratoconus patients

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