$Accuracy, speed and repeatability of the voice assisted subjective refractor (VASR)$
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Accuracy, speed and repeatability of the voice assisted subjective refractor (VASR)

Alan G Kabat,1 Christopher W Lievens,2 Christina M Newman,2 Jacob Weber2 1Pennsylvania College of Optometry, Salus University, Elkins Park, PA, USA; 2Southern College of Optometry, Memphis, TN, USACorrespondence: Alan G KabatPennsylvania College of Optometry, Salus University, 8360 Old York Road, El...

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Autores principales:	Kabat AG, Lievens CW, Newman CM, Weber J
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2019
Materias:	autorefractor subjective refraction wavefront aberrometry point-spread function VASR Ophthalmology RE1-994
Acceso en línea:	https://doaj.org/article/4c6831ec9ae841c680793d10ac694fca
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spelling	oai:doaj.org-article:4c6831ec9ae841c680793d10ac694fca2021-12-02T07:38:36ZAccuracy, speed and repeatability of the voice assisted subjective refractor (VASR)1177-5483https://doaj.org/article/4c6831ec9ae841c680793d10ac694fca2019-09-01T00:00:00Zhttps://www.dovepress.com/accuracy-speed-and-repeatability-of-the-voice-assisted-subjective-refr-peer-reviewed-article-OPTHhttps://doaj.org/toc/1177-5483Alan G Kabat,1 Christopher W Lievens,2 Christina M Newman,2 Jacob Weber2 1Pennsylvania College of Optometry, Salus University, Elkins Park, PA, USA; 2Southern College of Optometry, Memphis, TN, USACorrespondence: Alan G KabatPennsylvania College of Optometry, Salus University, 8360 Old York Road, Elkins Park, PA 19027, USATel +1 954 553 1061Fax +1 856 433 8439Email alan.kabat@alankabat.comPurpose: To compare the accuracy, speed and repeatability of the voice assisted subjective refractor (VASR) to traditional refractive methods.Methods: Fifty healthy adult subjects were examined by autorefractor, followed by subjective phoropter refinement. Subjects were then evaluated using the VASR (Vmax Vision) to obtain an objective and subjective result. Three total assessments were performed for each subject using each of the methods described. Corrected visual acuity was recorded for each eye after each procedure. The total time was measured for both the traditional and VASR refraction.Results: A comparison of the results obtained by traditional refraction and VASR revealed no statistically significant difference from the mean in equivalent sphere measurements (P=0.1383), and the datasets were highly correlated (r=0.993). The data comparisons for cylinder power and axis were similar (cylinder: P=0.6377, r=0.864) (axis: P=0.6991, r=0.738). VASR, on average, required 71 additional seconds to complete when compared to traditional phoropter refraction. In terms of repeatability, the average difference noted upon repeat of equivalent sphere power was 0.01 D for the phoropter (P=0.98) and 0.10 D for the VASR (P=0.23). For sphere power, the average difference was 0.02 D for the phoropter (P=0.55) and 0.07 D for the VASR (P=0.58). For cylinder power, the average difference was 0.02 D for the phoropter (P=0.11) and 0.03 D for the VASR (P=0.39). For all refractive methods, the differences between measurements amounted to ≤0.10 diopters, which is neither clinically nor statistically significant.Conclusion: Refractive error results obtained with the VASR were not statistically different from those achieved using traditional phoropter methods. Time elapsed for the VASR was slightly longer than a more traditional refractive sequence. The VASR demonstrated clinically and statistically significant repeatability of measurement, consistent with traditional refraction.Keywords: autorefractor, subjective refraction, wavefront aberrometry, point-spread function, VASRKabat AGLievens CWNewman CMWeber JDove Medical Pressarticleautorefractorsubjective refractionwavefront aberrometrypoint-spread functionVASROphthalmologyRE1-994ENClinical Ophthalmology, Vol Volume 13, Pp 1807-1813 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	autorefractor subjective refraction wavefront aberrometry point-spread function VASR Ophthalmology RE1-994
spellingShingle	autorefractor subjective refraction wavefront aberrometry point-spread function VASR Ophthalmology RE1-994 Kabat AG Lievens CW Newman CM Weber J Accuracy, speed and repeatability of the voice assisted subjective refractor (VASR)
description	Alan G Kabat,1 Christopher W Lievens,2 Christina M Newman,2 Jacob Weber2 1Pennsylvania College of Optometry, Salus University, Elkins Park, PA, USA; 2Southern College of Optometry, Memphis, TN, USACorrespondence: Alan G KabatPennsylvania College of Optometry, Salus University, 8360 Old York Road, Elkins Park, PA 19027, USATel +1 954 553 1061Fax +1 856 433 8439Email alan.kabat@alankabat.comPurpose: To compare the accuracy, speed and repeatability of the voice assisted subjective refractor (VASR) to traditional refractive methods.Methods: Fifty healthy adult subjects were examined by autorefractor, followed by subjective phoropter refinement. Subjects were then evaluated using the VASR (Vmax Vision) to obtain an objective and subjective result. Three total assessments were performed for each subject using each of the methods described. Corrected visual acuity was recorded for each eye after each procedure. The total time was measured for both the traditional and VASR refraction.Results: A comparison of the results obtained by traditional refraction and VASR revealed no statistically significant difference from the mean in equivalent sphere measurements (P=0.1383), and the datasets were highly correlated (r=0.993). The data comparisons for cylinder power and axis were similar (cylinder: P=0.6377, r=0.864) (axis: P=0.6991, r=0.738). VASR, on average, required 71 additional seconds to complete when compared to traditional phoropter refraction. In terms of repeatability, the average difference noted upon repeat of equivalent sphere power was 0.01 D for the phoropter (P=0.98) and 0.10 D for the VASR (P=0.23). For sphere power, the average difference was 0.02 D for the phoropter (P=0.55) and 0.07 D for the VASR (P=0.58). For cylinder power, the average difference was 0.02 D for the phoropter (P=0.11) and 0.03 D for the VASR (P=0.39). For all refractive methods, the differences between measurements amounted to ≤0.10 diopters, which is neither clinically nor statistically significant.Conclusion: Refractive error results obtained with the VASR were not statistically different from those achieved using traditional phoropter methods. Time elapsed for the VASR was slightly longer than a more traditional refractive sequence. The VASR demonstrated clinically and statistically significant repeatability of measurement, consistent with traditional refraction.Keywords: autorefractor, subjective refraction, wavefront aberrometry, point-spread function, VASR
format	article
author	Kabat AG Lievens CW Newman CM Weber J
author_facet	Kabat AG Lievens CW Newman CM Weber J
author_sort	Kabat AG
title	Accuracy, speed and repeatability of the voice assisted subjective refractor (VASR)
title_short	Accuracy, speed and repeatability of the voice assisted subjective refractor (VASR)
title_full	Accuracy, speed and repeatability of the voice assisted subjective refractor (VASR)
title_fullStr	Accuracy, speed and repeatability of the voice assisted subjective refractor (VASR)
title_full_unstemmed	Accuracy, speed and repeatability of the voice assisted subjective refractor (VASR)
title_sort	accuracy, speed and repeatability of the voice assisted subjective refractor (vasr)
publisher	Dove Medical Press
publishDate	2019
url	https://doaj.org/article/4c6831ec9ae841c680793d10ac694fca
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Accuracy, speed and repeatability of the voice assisted subjective refractor (VASR)

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