Comparison of central corneal thickness measurements using ultrasound pachymetry, ultrasound biomicroscopy, and the Artemis-2 VHF scanner in normal eyes

Haya M Al-Farhan, Wafa&rsquo;a Majed Al-OtaibiDepartment of Optometry and Vision Sciences, College of Applied Medicine Science, King Saud University, Riyadh, Kingdom of Saudia ArabiaPurpose: To compare the precision of central corneal thickness (CCT) measurements taken with the handheld ultr...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Al-Farhan HM, Al-Otaibi WM
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2012
Materias:	Ophthalmology RE1-994
Acceso en línea:	https://doaj.org/article/6495440041a444818acd3a03e05b61ab
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:6495440041a444818acd3a03e05b61ab
record_format	dspace
spelling	oai:doaj.org-article:6495440041a444818acd3a03e05b61ab2021-12-02T02:30:54ZComparison of central corneal thickness measurements using ultrasound pachymetry, ultrasound biomicroscopy, and the Artemis-2 VHF scanner in normal eyes1177-54671177-5483https://doaj.org/article/6495440041a444818acd3a03e05b61ab2012-07-01T00:00:00Zhttp://www.dovepress.com/comparison-of-central-corneal-thickness-measurements-using-ultrasound--a10327https://doaj.org/toc/1177-5467https://doaj.org/toc/1177-5483Haya M Al-Farhan, Wafa&rsquo;a Majed Al-OtaibiDepartment of Optometry and Vision Sciences, College of Applied Medicine Science, King Saud University, Riyadh, Kingdom of Saudia ArabiaPurpose: To compare the precision of central corneal thickness (CCT) measurements taken with the handheld ultrasound pachymeter (USP), ultrasound biomicroscopy (UBM), and the Artemis-2 very high frequency ultrasound scanner (VHFUS) on normal subjects.Design: Prospective study.Methods: One eye from each of 61 normal subjects was randomly selected for this study. The measurements of the CCT were taken with the USP, VHFUS, and UBM. Results were compared statistically using repeated-measures analysis of variance (ANOVA), Pearson&rsquo;s correlation coefficient, and limits of agreement.Results: The average CCT (&plusmn; standard deviation) was 530.1 &plusmn; 30.5 &micro;m, 554.9 &plusmn; 31.7 &micro;m, and 559.5 &plusmn; 30.7 &micro;m for UBM, VHFUS, and USP respectively. The intraobserver repeatability analyses of variance are not significant for USP, UBM, and VHFUS. P-values were 0.17, 0.19, and 0.37 respectively. Repeated-measures ANOVA showed a significant difference between the three different methods of measuring CCT (P = 0.0001). The ANOVA test revealed no statistically significant difference between USP and VHFUS (P &gt; 0.05), yet statistical significant differences with UBM versus USP and UBM versus VHFUS (P &lt; 0.001). There were high correlations between the three instruments (P &lt; 0.0001). The mean differences (and upper/lower limits of agreement) for CCT measurements were 29.4 &plusmn; 14.3 (2.7/56), 4.6 &plusmn; 8.6 (-14.7/23.8), and -24.8 &plusmn; 13.1 (-50.4/0.8) for USP versus UBM, USP versus VHFUS, and UBM versus VHFUS, respectively.Conclusion: The UBM produces CCT measurements that vary significantly from those returned by the USP and the VHFUS, suggesting that the UBM may not be used interchangeably with either equipment for monitoring the CCT in the clinical setting.Keywords: central corneal thickness, ultrasound pachymetry, ultrasound biomicroscopy, Artemis-2 VHFUS, Artemis, normal eyesAl-Farhan HMAl-Otaibi WMDove Medical PressarticleOphthalmologyRE1-994ENClinical Ophthalmology, Vol 2012, Iss default, Pp 1037-1043 (2012)
institution	DOAJ
collection	DOAJ
language	EN
topic	Ophthalmology RE1-994
spellingShingle	Ophthalmology RE1-994 Al-Farhan HM Al-Otaibi WM Comparison of central corneal thickness measurements using ultrasound pachymetry, ultrasound biomicroscopy, and the Artemis-2 VHF scanner in normal eyes
description	Haya M Al-Farhan, Wafa&rsquo;a Majed Al-OtaibiDepartment of Optometry and Vision Sciences, College of Applied Medicine Science, King Saud University, Riyadh, Kingdom of Saudia ArabiaPurpose: To compare the precision of central corneal thickness (CCT) measurements taken with the handheld ultrasound pachymeter (USP), ultrasound biomicroscopy (UBM), and the Artemis-2 very high frequency ultrasound scanner (VHFUS) on normal subjects.Design: Prospective study.Methods: One eye from each of 61 normal subjects was randomly selected for this study. The measurements of the CCT were taken with the USP, VHFUS, and UBM. Results were compared statistically using repeated-measures analysis of variance (ANOVA), Pearson&rsquo;s correlation coefficient, and limits of agreement.Results: The average CCT (&plusmn; standard deviation) was 530.1 &plusmn; 30.5 &micro;m, 554.9 &plusmn; 31.7 &micro;m, and 559.5 &plusmn; 30.7 &micro;m for UBM, VHFUS, and USP respectively. The intraobserver repeatability analyses of variance are not significant for USP, UBM, and VHFUS. P-values were 0.17, 0.19, and 0.37 respectively. Repeated-measures ANOVA showed a significant difference between the three different methods of measuring CCT (P = 0.0001). The ANOVA test revealed no statistically significant difference between USP and VHFUS (P &gt; 0.05), yet statistical significant differences with UBM versus USP and UBM versus VHFUS (P &lt; 0.001). There were high correlations between the three instruments (P &lt; 0.0001). The mean differences (and upper/lower limits of agreement) for CCT measurements were 29.4 &plusmn; 14.3 (2.7/56), 4.6 &plusmn; 8.6 (-14.7/23.8), and -24.8 &plusmn; 13.1 (-50.4/0.8) for USP versus UBM, USP versus VHFUS, and UBM versus VHFUS, respectively.Conclusion: The UBM produces CCT measurements that vary significantly from those returned by the USP and the VHFUS, suggesting that the UBM may not be used interchangeably with either equipment for monitoring the CCT in the clinical setting.Keywords: central corneal thickness, ultrasound pachymetry, ultrasound biomicroscopy, Artemis-2 VHFUS, Artemis, normal eyes
format	article
author	Al-Farhan HM Al-Otaibi WM
author_facet	Al-Farhan HM Al-Otaibi WM
author_sort	Al-Farhan HM
title	Comparison of central corneal thickness measurements using ultrasound pachymetry, ultrasound biomicroscopy, and the Artemis-2 VHF scanner in normal eyes
title_short	Comparison of central corneal thickness measurements using ultrasound pachymetry, ultrasound biomicroscopy, and the Artemis-2 VHF scanner in normal eyes
title_full	Comparison of central corneal thickness measurements using ultrasound pachymetry, ultrasound biomicroscopy, and the Artemis-2 VHF scanner in normal eyes
title_fullStr	Comparison of central corneal thickness measurements using ultrasound pachymetry, ultrasound biomicroscopy, and the Artemis-2 VHF scanner in normal eyes
title_full_unstemmed	Comparison of central corneal thickness measurements using ultrasound pachymetry, ultrasound biomicroscopy, and the Artemis-2 VHF scanner in normal eyes
title_sort	comparison of central corneal thickness measurements using ultrasound pachymetry, ultrasound biomicroscopy, and the artemis-2 vhf scanner in normal eyes
publisher	Dove Medical Press
publishDate	2012
url	https://doaj.org/article/6495440041a444818acd3a03e05b61ab
work_keys_str_mv	AT alfarhanhm comparisonofcentralcornealthicknessmeasurementsusingultrasoundpachymetryultrasoundbiomicroscopyandtheartemis2vhfscannerinnormaleyes AT alotaibiwm comparisonofcentralcornealthicknessmeasurementsusingultrasoundpachymetryultrasoundbiomicroscopyandtheartemis2vhfscannerinnormaleyes
_version_	1718402412699451392

Comparison of central corneal thickness measurements using ultrasound pachymetry, ultrasound biomicroscopy, and the Artemis-2 VHF scanner in normal eyes

Ejemplares similares