Visual evoked potential repeatability using the Diopsys NOVA LX fixed protocol in normal older adults

Richard C Trevino,1 Carolyn E Majcher,1 Adreain M Henry,1 Melinda Rodriguez,1 William E Sponsel1–3 1Rosenberg School of Optometry, University of the Incarnate Word, San Antonio, TX, USA; 2WESMDPA Baptist Medical Center Glaucoma Service, San Antonio, TX, USA; 3Department of Biomedical Engi...

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Autores principales:	Trevino RC, Majcher CE, Henry AM, Rodriguez M, Sponsel WE
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2018
Materias:	Electrophysiology Visual evoked potential Glaucoma Repeatability Ophthalmology RE1-994
Acceso en línea:	https://doaj.org/article/91ba503922924e3a8a76160f08dbaca7
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spelling	oai:doaj.org-article:91ba503922924e3a8a76160f08dbaca72021-12-02T08:34:48ZVisual evoked potential repeatability using the Diopsys NOVA LX fixed protocol in normal older adults1177-5483https://doaj.org/article/91ba503922924e3a8a76160f08dbaca72018-09-01T00:00:00Zhttps://www.dovepress.com/visual-evoked-potential-repeatability-using-the-diopsys-nova-lx-fixed--peer-reviewed-article-OPTHhttps://doaj.org/toc/1177-5483Richard C Trevino,1 Carolyn E Majcher,1 Adreain M Henry,1 Melinda Rodriguez,1 William E Sponsel1–3 1Rosenberg School of Optometry, University of the Incarnate Word, San Antonio, TX, USA; 2WESMDPA Baptist Medical Center Glaucoma Service, San Antonio, TX, USA; 3Department of Biomedical Engineering, University of Texas San Antonio, San Antonio, TX, USA Purpose: The purpose of this study was to evaluate the intrasession and intersession repeatability of visual evoked potentials in normal adults over 40 years of age as recorded using the Diopsys NOVA LX fixed protocol.Methods: Inclusion criteria were adults aged over 40 years with best corrected distance acuity of 20/40 or better in each eye. Subjects underwent three consecutive visual evoked potential examinations using the Diopsys NOVA LX fixed protocol. All examination procedures were carried out in accordance with the manufacturer recommendations. To assess intersession repeatability, nine subjects returned in 2–6 weeks for repeat examination.Results: A total of 46 subjects were recruited. Mean ± SD age: 53±9 years (range: 40–84 years); 69% of subjects were female and 80% were non-white. Coefficients of variation (CVs) and intraclass correlation coefficients (ICCs) revealed greater repeatability for P100 latency (CV: 3%–7%; ICC: 0.39–0.76) than for P100 amplitude (CV: 21%–33%; ICC: 0.34–0.69) and greater repeatability for recordings made with high contrast stimuli (amplitude CV: 21%–23%; latency CV: 3%–7%) than low contrast stimuli (amplitude CV: 24%–33%; latency CV: 6%–7%). Minimum detectable change values ranged between 4.50 and 9.95 µv for amplitude and 8.16–15.26 ms for latency. Repeatability was not influenced by age, sex, or race.Conclusion: The Diopsys NOVA LX fixed protocol demonstrated clinically acceptable intrasession and intersession repeatability in these healthy older adults, with latency being more repeatable than amplitude and examinations employing high contrast stimuli being more repeatable than those using low contrast stimuli. Keywords: electrophysiology, visual evoked potential, glaucoma, repeatabilityTrevino RCMajcher CEHenry AMRodriguez MSponsel WEDove Medical PressarticleElectrophysiologyVisual evoked potentialGlaucomaRepeatabilityOphthalmologyRE1-994ENClinical Ophthalmology, Vol Volume 12, Pp 1713-1729 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Electrophysiology Visual evoked potential Glaucoma Repeatability Ophthalmology RE1-994
spellingShingle	Electrophysiology Visual evoked potential Glaucoma Repeatability Ophthalmology RE1-994 Trevino RC Majcher CE Henry AM Rodriguez M Sponsel WE Visual evoked potential repeatability using the Diopsys NOVA LX fixed protocol in normal older adults
description	Richard C Trevino,1 Carolyn E Majcher,1 Adreain M Henry,1 Melinda Rodriguez,1 William E Sponsel1–3 1Rosenberg School of Optometry, University of the Incarnate Word, San Antonio, TX, USA; 2WESMDPA Baptist Medical Center Glaucoma Service, San Antonio, TX, USA; 3Department of Biomedical Engineering, University of Texas San Antonio, San Antonio, TX, USA Purpose: The purpose of this study was to evaluate the intrasession and intersession repeatability of visual evoked potentials in normal adults over 40 years of age as recorded using the Diopsys NOVA LX fixed protocol.Methods: Inclusion criteria were adults aged over 40 years with best corrected distance acuity of 20/40 or better in each eye. Subjects underwent three consecutive visual evoked potential examinations using the Diopsys NOVA LX fixed protocol. All examination procedures were carried out in accordance with the manufacturer recommendations. To assess intersession repeatability, nine subjects returned in 2–6 weeks for repeat examination.Results: A total of 46 subjects were recruited. Mean ± SD age: 53±9 years (range: 40–84 years); 69% of subjects were female and 80% were non-white. Coefficients of variation (CVs) and intraclass correlation coefficients (ICCs) revealed greater repeatability for P100 latency (CV: 3%–7%; ICC: 0.39–0.76) than for P100 amplitude (CV: 21%–33%; ICC: 0.34–0.69) and greater repeatability for recordings made with high contrast stimuli (amplitude CV: 21%–23%; latency CV: 3%–7%) than low contrast stimuli (amplitude CV: 24%–33%; latency CV: 6%–7%). Minimum detectable change values ranged between 4.50 and 9.95 µv for amplitude and 8.16–15.26 ms for latency. Repeatability was not influenced by age, sex, or race.Conclusion: The Diopsys NOVA LX fixed protocol demonstrated clinically acceptable intrasession and intersession repeatability in these healthy older adults, with latency being more repeatable than amplitude and examinations employing high contrast stimuli being more repeatable than those using low contrast stimuli. Keywords: electrophysiology, visual evoked potential, glaucoma, repeatability
format	article
author	Trevino RC Majcher CE Henry AM Rodriguez M Sponsel WE
author_facet	Trevino RC Majcher CE Henry AM Rodriguez M Sponsel WE
author_sort	Trevino RC
title	Visual evoked potential repeatability using the Diopsys NOVA LX fixed protocol in normal older adults
title_short	Visual evoked potential repeatability using the Diopsys NOVA LX fixed protocol in normal older adults
title_full	Visual evoked potential repeatability using the Diopsys NOVA LX fixed protocol in normal older adults
title_fullStr	Visual evoked potential repeatability using the Diopsys NOVA LX fixed protocol in normal older adults
title_full_unstemmed	Visual evoked potential repeatability using the Diopsys NOVA LX fixed protocol in normal older adults
title_sort	visual evoked potential repeatability using the diopsys nova lx fixed protocol in normal older adults
publisher	Dove Medical Press
publishDate	2018
url	https://doaj.org/article/91ba503922924e3a8a76160f08dbaca7
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Visual evoked potential repeatability using the Diopsys NOVA LX fixed protocol in normal older adults

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