Topography-guided hyperopic and hyperopic astigmatism femtosecond laser-assisted LASIK: long-term experience with the 400 Hz eye-Q excimer platform

Anastasios John KanellopoulosDepartment of Ophthalmology, New York University Medical School, New York, NY, and LaserVision.gr Eye Institute, Athens, GreeceBackground: The purpose of this study was to evaluate the safety and efficacy of topography-guided ablation using the WaveLight 400 Hz excimer l...

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Autor principal:	Kanellopoulos AJ
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2012
Materias:	Ophthalmology RE1-994
Acceso en línea:	https://doaj.org/article/08957f547580418a91851c67928435e6
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spelling	oai:doaj.org-article:08957f547580418a91851c67928435e62021-12-02T04:19:45ZTopography-guided hyperopic and hyperopic astigmatism femtosecond laser-assisted LASIK: long-term experience with the 400 Hz eye-Q excimer platform1177-54671177-5483https://doaj.org/article/08957f547580418a91851c67928435e62012-06-01T00:00:00Zhttp://www.dovepress.com/topography-guided-hyperopic-and-hyperopic-astigmatism-femtosecond-lase-a10088https://doaj.org/toc/1177-5467https://doaj.org/toc/1177-5483Anastasios John KanellopoulosDepartment of Ophthalmology, New York University Medical School, New York, NY, and LaserVision.gr Eye Institute, Athens, GreeceBackground: The purpose of this study was to evaluate the safety and efficacy of topography-guided ablation using the WaveLight 400 Hz excimer laser in laser-assisted in situ keratomileusis (LASIK) for hyperopia and/or hyperopic astigmatism.Methods: We prospectively evaluated 208 consecutive LASIK cases for hyperopia with or without astigmatism using the topography-guided platform of the 400 Hz Eye-Q excimer system. The mean preoperative sphere value was +3.04 &plusmn; 1.75 (range 0.75&ndash;7.25) diopters (D) and the mean cylinder value was &ndash;1.24 &plusmn; 1.41 (&ndash;4.75&ndash;0) D. Flaps were created either with Intralase FS60 (AMO, Irvine, CA) or FS200 (Alcon, Fort Worth, TX) femtosecond lasers. Parameters evaluated included age, preoperative and postoperative refractive error, uncorrected distance visual acuity, corrected distance visual acuity, flap diameter and thickness, topographic changes, higher order aberration changes, and low contrast sensitivity. These measurements were repeated postoperatively at regular intervals for at least 24 months.Results: Two hundred and two eyes were available for follow-up at 24 months. Uncorrected distance visual acuity improved from 5.5/10 to 9.2/10. At 24 (8&ndash;37) months, 75.5% of the eyes were in the &plusmn;0.50 D range and 94.4% were in the &plusmn;1.00 D range of the refractive goal. Postoperatively, the mean sphere value was &ndash;0.39 &plusmn; 0.3 and the cylinder value was &ndash;0.35 &plusmn; 0.25. Topographic evidence showed that ablation was made in the visual axis and not in the center of the cornea, thus correlating with the angle kappa. No significant complications were encountered in this small group of patients.Conclusion: Hyperopic LASIK utilizing the topography-guided platform of the 400 Hz Eye-Q Allegretto excimer and a femtosecond laser flap appears to be safe and effective for correction of hyperopia and/or hyperopic astigmatism. The results are impressive for refractive error correction and stability and for improvement of both uncorrected and corrected distance visual acuity.Keywords: topography-guided, LASIK, hyperopia, hyperopic astigmatism, mixed astigmatism, angle kappaKanellopoulos AJDove Medical PressarticleOphthalmologyRE1-994ENClinical Ophthalmology, Vol 2012, Iss default, Pp 895-901 (2012)
institution	DOAJ
collection	DOAJ
language	EN
topic	Ophthalmology RE1-994
spellingShingle	Ophthalmology RE1-994 Kanellopoulos AJ Topography-guided hyperopic and hyperopic astigmatism femtosecond laser-assisted LASIK: long-term experience with the 400 Hz eye-Q excimer platform
description	Anastasios John KanellopoulosDepartment of Ophthalmology, New York University Medical School, New York, NY, and LaserVision.gr Eye Institute, Athens, GreeceBackground: The purpose of this study was to evaluate the safety and efficacy of topography-guided ablation using the WaveLight 400 Hz excimer laser in laser-assisted in situ keratomileusis (LASIK) for hyperopia and/or hyperopic astigmatism.Methods: We prospectively evaluated 208 consecutive LASIK cases for hyperopia with or without astigmatism using the topography-guided platform of the 400 Hz Eye-Q excimer system. The mean preoperative sphere value was +3.04 &plusmn; 1.75 (range 0.75&ndash;7.25) diopters (D) and the mean cylinder value was &ndash;1.24 &plusmn; 1.41 (&ndash;4.75&ndash;0) D. Flaps were created either with Intralase FS60 (AMO, Irvine, CA) or FS200 (Alcon, Fort Worth, TX) femtosecond lasers. Parameters evaluated included age, preoperative and postoperative refractive error, uncorrected distance visual acuity, corrected distance visual acuity, flap diameter and thickness, topographic changes, higher order aberration changes, and low contrast sensitivity. These measurements were repeated postoperatively at regular intervals for at least 24 months.Results: Two hundred and two eyes were available for follow-up at 24 months. Uncorrected distance visual acuity improved from 5.5/10 to 9.2/10. At 24 (8&ndash;37) months, 75.5% of the eyes were in the &plusmn;0.50 D range and 94.4% were in the &plusmn;1.00 D range of the refractive goal. Postoperatively, the mean sphere value was &ndash;0.39 &plusmn; 0.3 and the cylinder value was &ndash;0.35 &plusmn; 0.25. Topographic evidence showed that ablation was made in the visual axis and not in the center of the cornea, thus correlating with the angle kappa. No significant complications were encountered in this small group of patients.Conclusion: Hyperopic LASIK utilizing the topography-guided platform of the 400 Hz Eye-Q Allegretto excimer and a femtosecond laser flap appears to be safe and effective for correction of hyperopia and/or hyperopic astigmatism. The results are impressive for refractive error correction and stability and for improvement of both uncorrected and corrected distance visual acuity.Keywords: topography-guided, LASIK, hyperopia, hyperopic astigmatism, mixed astigmatism, angle kappa
format	article
author	Kanellopoulos AJ
author_facet	Kanellopoulos AJ
author_sort	Kanellopoulos AJ
title	Topography-guided hyperopic and hyperopic astigmatism femtosecond laser-assisted LASIK: long-term experience with the 400 Hz eye-Q excimer platform
title_short	Topography-guided hyperopic and hyperopic astigmatism femtosecond laser-assisted LASIK: long-term experience with the 400 Hz eye-Q excimer platform
title_full	Topography-guided hyperopic and hyperopic astigmatism femtosecond laser-assisted LASIK: long-term experience with the 400 Hz eye-Q excimer platform
title_fullStr	Topography-guided hyperopic and hyperopic astigmatism femtosecond laser-assisted LASIK: long-term experience with the 400 Hz eye-Q excimer platform
title_full_unstemmed	Topography-guided hyperopic and hyperopic astigmatism femtosecond laser-assisted LASIK: long-term experience with the 400 Hz eye-Q excimer platform
title_sort	topography-guided hyperopic and hyperopic astigmatism femtosecond laser-assisted lasik: long-term experience with the 400 hz eye-q excimer platform
publisher	Dove Medical Press
publishDate	2012
url	https://doaj.org/article/08957f547580418a91851c67928435e6
work_keys_str_mv	AT kanellopoulosaj topographyguidedhyperopicandhyperopicastigmatismfemtosecondlaserassistedlasiklongtermexperiencewiththe400hzeyeqexcimerplatform
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Topography-guided hyperopic and hyperopic astigmatism femtosecond laser-assisted LASIK: long-term experience with the 400 Hz eye-Q excimer platform

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