Measuring accurate IOPs: Does correction factor help or hurt?

Pinakin Gunvant1, Robert D Newcomb2, Elliot M Kirstein3, Victor E Malinovsky4, Richard J Madonna5, Richard E Meetz 41Southern College of Optometry, Memphis, Tennessee, USA; 2The Ohio State University College of Optometry, Columbus, Ohio, USA; 3The Glaucoma and Diabetes Eye Institute, Cincinnati, Ohi...

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Autores principales:	Pinakin Gunvant, Robert D Newcomb, Elliot M Kirstein, et al
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2010
Materias:	Ophthalmology RE1-994
Acceso en línea:	https://doaj.org/article/979e5b92218e4a668db6f8eb079ad17b
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spelling	oai:doaj.org-article:979e5b92218e4a668db6f8eb079ad17b2021-12-02T01:52:47ZMeasuring accurate IOPs: Does correction factor help or hurt?1177-54671177-5483https://doaj.org/article/979e5b92218e4a668db6f8eb079ad17b2010-06-01T00:00:00Zhttp://www.dovepress.com/measuring-accurate-iops-does-correction-factor-help-or-hurt-a4676https://doaj.org/toc/1177-5467https://doaj.org/toc/1177-5483Pinakin Gunvant1, Robert D Newcomb2, Elliot M Kirstein3, Victor E Malinovsky4, Richard J Madonna5, Richard E Meetz 41Southern College of Optometry, Memphis, Tennessee, USA; 2The Ohio State University College of Optometry, Columbus, Ohio, USA; 3The Glaucoma and Diabetes Eye Institute, Cincinnati, Ohio, USA; 4Indiana University School of Optometry, Bloomington, Indiana, USA; 5State University of New York College of Optometry, New York, USAPurpose: To evaluate if using the Ehlers correction factor on the intraocular pressure (IOP) measured using the Goldmann applanation tonometer (GAT) improves its agreement with the PASCAL dynamic contour tonometer (DCT).Patients and methods: A total of 120 eyes of 120 individuals were examined. Participants underwent IOP measurement with both the DCT and the GAT and central corneal thickness measurement. The Ehlers correction factor was applied on the GAT IOP measurements to calculate Ehlers-corrected GAT IOP. The agreement between the DCT and GAT, and DCT and Ehlers-corrected GAT IOP was analyzed. The analyses were repeated by stratifying the data by race.Results: The mean IOP of the GAT, DCT, and the Ehlers-corrected GAT was 15.30, 16.78, and 14.68 mmHg, respectively. The agreement as assessed by Bland&ndash;Altman plot for the GAT with the DCT and DCT and Ehlers-corrected GAT IOP was +4.1 to &minus;6.9 and +4.15 to &minus;8.25 mmHg, respectively. The results were similar even when stratifying the data by race.Conclusion: Using Ehlers correction factor to account for the effect of corneal parameters on the IOP measured by the GAT worsens the agreement with the DCT. This effect remains even when stratifying the data by race.Keywords: dynamic contour tonometer, Goldmann applanation tonometer, tonometric correction factors, central corneal thickness, intraocular pressure Pinakin GunvantRobert D NewcombElliot M Kirsteinet alDove Medical PressarticleOphthalmologyRE1-994ENClinical Ophthalmology, Vol 2010, Iss default, Pp 611-616 (2010)
institution	DOAJ
collection	DOAJ
language	EN
topic	Ophthalmology RE1-994
spellingShingle	Ophthalmology RE1-994 Pinakin Gunvant Robert D Newcomb Elliot M Kirstein et al Measuring accurate IOPs: Does correction factor help or hurt?
description	Pinakin Gunvant1, Robert D Newcomb2, Elliot M Kirstein3, Victor E Malinovsky4, Richard J Madonna5, Richard E Meetz 41Southern College of Optometry, Memphis, Tennessee, USA; 2The Ohio State University College of Optometry, Columbus, Ohio, USA; 3The Glaucoma and Diabetes Eye Institute, Cincinnati, Ohio, USA; 4Indiana University School of Optometry, Bloomington, Indiana, USA; 5State University of New York College of Optometry, New York, USAPurpose: To evaluate if using the Ehlers correction factor on the intraocular pressure (IOP) measured using the Goldmann applanation tonometer (GAT) improves its agreement with the PASCAL dynamic contour tonometer (DCT).Patients and methods: A total of 120 eyes of 120 individuals were examined. Participants underwent IOP measurement with both the DCT and the GAT and central corneal thickness measurement. The Ehlers correction factor was applied on the GAT IOP measurements to calculate Ehlers-corrected GAT IOP. The agreement between the DCT and GAT, and DCT and Ehlers-corrected GAT IOP was analyzed. The analyses were repeated by stratifying the data by race.Results: The mean IOP of the GAT, DCT, and the Ehlers-corrected GAT was 15.30, 16.78, and 14.68 mmHg, respectively. The agreement as assessed by Bland&ndash;Altman plot for the GAT with the DCT and DCT and Ehlers-corrected GAT IOP was +4.1 to &minus;6.9 and +4.15 to &minus;8.25 mmHg, respectively. The results were similar even when stratifying the data by race.Conclusion: Using Ehlers correction factor to account for the effect of corneal parameters on the IOP measured by the GAT worsens the agreement with the DCT. This effect remains even when stratifying the data by race.Keywords: dynamic contour tonometer, Goldmann applanation tonometer, tonometric correction factors, central corneal thickness, intraocular pressure
format	article
author	Pinakin Gunvant Robert D Newcomb Elliot M Kirstein et al
author_facet	Pinakin Gunvant Robert D Newcomb Elliot M Kirstein et al
author_sort	Pinakin Gunvant
title	Measuring accurate IOPs: Does correction factor help or hurt?
title_short	Measuring accurate IOPs: Does correction factor help or hurt?
title_full	Measuring accurate IOPs: Does correction factor help or hurt?
title_fullStr	Measuring accurate IOPs: Does correction factor help or hurt?
title_full_unstemmed	Measuring accurate IOPs: Does correction factor help or hurt?
title_sort	measuring accurate iops: does correction factor help or hurt?
publisher	Dove Medical Press
publishDate	2010
url	https://doaj.org/article/979e5b92218e4a668db6f8eb079ad17b
work_keys_str_mv	AT pinakingunvant measuringaccurateiopsdoescorrectionfactorhelporhurt AT robertdnewcomb measuringaccurateiopsdoescorrectionfactorhelporhurt AT elliotmkirstein measuringaccurateiopsdoescorrectionfactorhelporhurt AT etal measuringaccurateiopsdoescorrectionfactorhelporhurt
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Measuring accurate IOPs: Does correction factor help or hurt?

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