Accuracy of Alcon WaveLight® EX500 optical pachymetry during LASIK

Accuracy of Alcon WaveLight® EX500 optical pachymetry during LASIK

Mark D Mifflin,1 Xavier M Mortensen,1 Brent S Betts,1 Cole Gross,2 Brian Zaugg1 1Department of Ophthalmology and Visual Sciences, John A Moran Eye Center, University of Utah, Salt Lake City, UT, 2University of Nevada School of Medicine, Reno, NV, USA Purpose: To study the accuracy and reliability...

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Autores principales: Mifflin MD, Mortensen XM, Betts BS, Gross C, Zaugg B
Formato: article
Lenguaje:EN
Publicado: Dove Medical Press 2017
Materias:
flap thickness
optical coherence tomography
femtosecond laser
Ophthalmology
RE1-994
Acceso en línea:https://doaj.org/article/5222b91dfce1486ba69b057d5a758647
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spelling oai:doaj.org-article:5222b91dfce1486ba69b057d5a7586472021-12-02T02:39:49ZAccuracy of Alcon WaveLight® EX500 optical pachymetry during LASIK1177-5483https://doaj.org/article/5222b91dfce1486ba69b057d5a7586472017-08-01T00:00:00Zhttps://www.dovepress.com/accuracy-of-alcon-wavelightreg-ex500-optical-pachymetry-during-lasik-peer-reviewed-article-OPTHhttps://doaj.org/toc/1177-5483Mark D Mifflin,1 Xavier M Mortensen,1 Brent S Betts,1 Cole Gross,2 Brian Zaugg1 1Department of Ophthalmology and Visual Sciences, John A Moran Eye Center, University of Utah, Salt Lake City, UT, 2University of Nevada School of Medicine, Reno, NV, USA Purpose: To study the accuracy and reliability of optical pachymetry using the Alcon WaveLight EX500 during laser-assisted in situ keratomileusis (LASIK). Materials and methods: This was a retrospective chart review of 90 eyes from 45 patients who had undergone LASIK (mean age 35.2±8.2 years; 19 males, 26 females). The WaveLight FS200 femtosecond laser was programmed to cut LASIK flaps at a desired depth of 120 µm. Optical low-coherence reflectometry (WaveLight EX500) was used to measure central corneal thickness prior to lifting the flap, and the residual stromal bed immediately after excimer ablation. Flap thickness (FT) was calculated using simple subtraction. Optical coherence tomography (OCT) was used to measure central corneal thickness, flap thickness, and residual stromal bed in the postoperative period and the results compared to intraoperative measurements. Results: Mean programmed FS200 FT was 119 µm. Mean FT using EX500 optical pachymetry was 109 µm. The difference between FS200- programmed and EX500-measured FT was 9 µm (P<0.001). There was also a significant difference between the EX500 and OCT FT (109 µm vs 119 µm, respectively; P<0.001). Conclusion: FT values calculated using intraoperative EX500 optical pachymetry were significantly lower than programmed FS200 values or OCT measurements. Keywords: flap thickness, optical coherence tomography, femtosecond laserMifflin MDMortensen XMBetts BSGross CZaugg BDove Medical Pressarticleflap thicknessoptical coherence tomographyfemtosecond laserOphthalmologyRE1-994ENClinical Ophthalmology, Vol Volume 11, Pp 1513-1517 (2017)
institution DOAJ
collection DOAJ
language EN
topic flap thickness
optical coherence tomography
femtosecond laser
Ophthalmology
RE1-994
spellingShingle flap thickness
optical coherence tomography
femtosecond laser
Ophthalmology
RE1-994
Mifflin MD
Mortensen XM
Betts BS
Gross C
Zaugg B
Accuracy of Alcon WaveLight® EX500 optical pachymetry during LASIK
description Mark D Mifflin,1 Xavier M Mortensen,1 Brent S Betts,1 Cole Gross,2 Brian Zaugg1 1Department of Ophthalmology and Visual Sciences, John A Moran Eye Center, University of Utah, Salt Lake City, UT, 2University of Nevada School of Medicine, Reno, NV, USA Purpose: To study the accuracy and reliability of optical pachymetry using the Alcon WaveLight EX500 during laser-assisted in situ keratomileusis (LASIK). Materials and methods: This was a retrospective chart review of 90 eyes from 45 patients who had undergone LASIK (mean age 35.2±8.2 years; 19 males, 26 females). The WaveLight FS200 femtosecond laser was programmed to cut LASIK flaps at a desired depth of 120 µm. Optical low-coherence reflectometry (WaveLight EX500) was used to measure central corneal thickness prior to lifting the flap, and the residual stromal bed immediately after excimer ablation. Flap thickness (FT) was calculated using simple subtraction. Optical coherence tomography (OCT) was used to measure central corneal thickness, flap thickness, and residual stromal bed in the postoperative period and the results compared to intraoperative measurements. Results: Mean programmed FS200 FT was 119 µm. Mean FT using EX500 optical pachymetry was 109 µm. The difference between FS200- programmed and EX500-measured FT was 9 µm (P<0.001). There was also a significant difference between the EX500 and OCT FT (109 µm vs 119 µm, respectively; P<0.001). Conclusion: FT values calculated using intraoperative EX500 optical pachymetry were significantly lower than programmed FS200 values or OCT measurements. Keywords: flap thickness, optical coherence tomography, femtosecond laser
format article
author Mifflin MD
Mortensen XM
Betts BS
Gross C
Zaugg B
author_facet Mifflin MD
Mortensen XM
Betts BS
Gross C
Zaugg B
author_sort Mifflin MD
title Accuracy of Alcon WaveLight® EX500 optical pachymetry during LASIK
title_short Accuracy of Alcon WaveLight® EX500 optical pachymetry during LASIK
title_full Accuracy of Alcon WaveLight® EX500 optical pachymetry during LASIK
title_fullStr Accuracy of Alcon WaveLight® EX500 optical pachymetry during LASIK
title_full_unstemmed Accuracy of Alcon WaveLight® EX500 optical pachymetry during LASIK
title_sort accuracy of alcon wavelight® ex500 optical pachymetry during lasik
publisher Dove Medical Press
publishDate 2017
url https://doaj.org/article/5222b91dfce1486ba69b057d5a758647
work_keys_str_mv AT mifflinmd accuracyofalconwavelightregex500opticalpachymetryduringlasik
AT mortensenxm accuracyofalconwavelightregex500opticalpachymetryduringlasik
AT bettsbs accuracyofalconwavelightregex500opticalpachymetryduringlasik
AT grossc accuracyofalconwavelightregex500opticalpachymetryduringlasik
AT zauggb accuracyofalconwavelightregex500opticalpachymetryduringlasik
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