Comparison of Goldmann and Pascal tonometry in relation to corneal hysteresis and central corneal thickness in nonglaucomatous eyes

G Mangouritsas, S Mourtzoukos, A Mantzounis, L AlexopoulosGlaucoma Department, Eye Clinic, &ldquo;Hellenic Red Cross&rdquo; General Hospital, Athens, GreeceObjective: To compare measurements obtained by Goldmann applanation tonometry (GAT) and Pascal dynamic contour tonometry (DCT),...

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Autores principales:	Mantzounis A, Mourtzoukos S, Mangouritsas G, Alexopoulos L
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2011
Materias:	Ophthalmology RE1-994
Acceso en línea:	https://doaj.org/article/93513951d7ff4dddbccefc21d8eb90ca
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spelling	oai:doaj.org-article:93513951d7ff4dddbccefc21d8eb90ca2021-12-02T00:29:41ZComparison of Goldmann and Pascal tonometry in relation to corneal hysteresis and central corneal thickness in nonglaucomatous eyes1177-54671177-5483https://doaj.org/article/93513951d7ff4dddbccefc21d8eb90ca2011-08-01T00:00:00Zhttp://www.dovepress.com/comparison-of-goldmann-and-pascal-tonometry-in-relation-to-corneal-hys-a8013https://doaj.org/toc/1177-5467https://doaj.org/toc/1177-5483G Mangouritsas, S Mourtzoukos, A Mantzounis, L AlexopoulosGlaucoma Department, Eye Clinic, &ldquo;Hellenic Red Cross&rdquo; General Hospital, Athens, GreeceObjective: To compare measurements obtained by Goldmann applanation tonometry (GAT) and Pascal dynamic contour tonometry (DCT), and to study their relationship to corneal thickness and biomechanical properties in nonglaucomatous eyes.Methods: This is a prospective and randomized study of 200 eyes from 200 non-glaucomatous subjects who underwent intraocular pressure (IOP) measurements by GAT and DCT. The two methods were compared and assessed for agreement by means of the Bland&ndash;Altman plot. Central corneal thickness (CCT) and corneal hysteresis (CH) were obtained by ultrasound pachymeter and Ocular Response Analyzer, respectively. The effect of CH and CCT was correlated with the DCT/GAT IOP differences.Results: Mean age was 57.4 &plusmn; 14.7 years (range 24&ndash;82 years). Mean IOP measurements obtained were 16.7 &plusmn; 3.2 mmHg by GAT and 19.4 &plusmn; 3.3 mmHg by DCT. DCT showed a statistically significant higher mean IOP (2.7 &plusmn; 1.9 mmHg, P &lt; 0.001) compared with GAT. Mean CCT and CH were 546.5 &plusmn; 40 &micro;m and 10.85 &plusmn; 2.0 mmHg, respectively. The differences in IOP (DCT &ndash; GAT) were significantly correlated with CCT and CH (Pearson&#39;s correlation coefficient r = &ndash;0.517 and &ndash;0.355, P &lt; 0.0001, respectively). The difference between the two correlation coefficients was statistically significant (P &lt; 0.05, Z-statistic). According to the Bland&ndash;Altman plot, the results of the two methods were clinically different.Conclusion: Significantly higher IOP readings were obtained by DCT than by GAT in nonglaucomatous subjects. The IOP differences between the two methods were associated with CCT and CH, suggesting that DCT was less dependent on corneal parameters. Each method provides clinically different IOP values, indicating that DCT and GAT should not be used interchangeably.Keywords: Pascal dynamic contour tonometry, Goldmann applanation tonometry, glaucoma, central corneal thickness, corneal hysteresisMantzounis AMourtzoukos SMangouritsas GAlexopoulos LDove Medical PressarticleOphthalmologyRE1-994ENClinical Ophthalmology, Vol 2011, Iss default, Pp 1071-1077 (2011)
institution	DOAJ
collection	DOAJ
language	EN
topic	Ophthalmology RE1-994
spellingShingle	Ophthalmology RE1-994 Mantzounis A Mourtzoukos S Mangouritsas G Alexopoulos L Comparison of Goldmann and Pascal tonometry in relation to corneal hysteresis and central corneal thickness in nonglaucomatous eyes
description	G Mangouritsas, S Mourtzoukos, A Mantzounis, L AlexopoulosGlaucoma Department, Eye Clinic, &ldquo;Hellenic Red Cross&rdquo; General Hospital, Athens, GreeceObjective: To compare measurements obtained by Goldmann applanation tonometry (GAT) and Pascal dynamic contour tonometry (DCT), and to study their relationship to corneal thickness and biomechanical properties in nonglaucomatous eyes.Methods: This is a prospective and randomized study of 200 eyes from 200 non-glaucomatous subjects who underwent intraocular pressure (IOP) measurements by GAT and DCT. The two methods were compared and assessed for agreement by means of the Bland&ndash;Altman plot. Central corneal thickness (CCT) and corneal hysteresis (CH) were obtained by ultrasound pachymeter and Ocular Response Analyzer, respectively. The effect of CH and CCT was correlated with the DCT/GAT IOP differences.Results: Mean age was 57.4 &plusmn; 14.7 years (range 24&ndash;82 years). Mean IOP measurements obtained were 16.7 &plusmn; 3.2 mmHg by GAT and 19.4 &plusmn; 3.3 mmHg by DCT. DCT showed a statistically significant higher mean IOP (2.7 &plusmn; 1.9 mmHg, P &lt; 0.001) compared with GAT. Mean CCT and CH were 546.5 &plusmn; 40 &micro;m and 10.85 &plusmn; 2.0 mmHg, respectively. The differences in IOP (DCT &ndash; GAT) were significantly correlated with CCT and CH (Pearson&#39;s correlation coefficient r = &ndash;0.517 and &ndash;0.355, P &lt; 0.0001, respectively). The difference between the two correlation coefficients was statistically significant (P &lt; 0.05, Z-statistic). According to the Bland&ndash;Altman plot, the results of the two methods were clinically different.Conclusion: Significantly higher IOP readings were obtained by DCT than by GAT in nonglaucomatous subjects. The IOP differences between the two methods were associated with CCT and CH, suggesting that DCT was less dependent on corneal parameters. Each method provides clinically different IOP values, indicating that DCT and GAT should not be used interchangeably.Keywords: Pascal dynamic contour tonometry, Goldmann applanation tonometry, glaucoma, central corneal thickness, corneal hysteresis
format	article
author	Mantzounis A Mourtzoukos S Mangouritsas G Alexopoulos L
author_facet	Mantzounis A Mourtzoukos S Mangouritsas G Alexopoulos L
author_sort	Mantzounis A
title	Comparison of Goldmann and Pascal tonometry in relation to corneal hysteresis and central corneal thickness in nonglaucomatous eyes
title_short	Comparison of Goldmann and Pascal tonometry in relation to corneal hysteresis and central corneal thickness in nonglaucomatous eyes
title_full	Comparison of Goldmann and Pascal tonometry in relation to corneal hysteresis and central corneal thickness in nonglaucomatous eyes
title_fullStr	Comparison of Goldmann and Pascal tonometry in relation to corneal hysteresis and central corneal thickness in nonglaucomatous eyes
title_full_unstemmed	Comparison of Goldmann and Pascal tonometry in relation to corneal hysteresis and central corneal thickness in nonglaucomatous eyes
title_sort	comparison of goldmann and pascal tonometry in relation to corneal hysteresis and central corneal thickness in nonglaucomatous eyes
publisher	Dove Medical Press
publishDate	2011
url	https://doaj.org/article/93513951d7ff4dddbccefc21d8eb90ca
work_keys_str_mv	AT mantzounisa comparisonofgoldmannandpascaltonometryinrelationtocornealhysteresisandcentralcornealthicknessinnonglaucomatouseyes AT mourtzoukoss comparisonofgoldmannandpascaltonometryinrelationtocornealhysteresisandcentralcornealthicknessinnonglaucomatouseyes AT mangouritsasg comparisonofgoldmannandpascaltonometryinrelationtocornealhysteresisandcentralcornealthicknessinnonglaucomatouseyes AT alexopoulosl comparisonofgoldmannandpascaltonometryinrelationtocornealhysteresisandcentralcornealthicknessinnonglaucomatouseyes
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Comparison of Goldmann and Pascal tonometry in relation to corneal hysteresis and central corneal thickness in nonglaucomatous eyes

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