Comparison of keratometric and pachymetric parameters with Scheimpflug imaging in normal and keratoconic Asian eyes

Hou-Boon Lim,1 Gavin Tan,1 Li Lim,1 Hla Myint Htoon2 1Singapore National Eye Centre, Singapore; 2Singapore Eye Research Institute, Singapore Purpose: To evaluate the keratometric and pachymetric parameters of keratoconic corneas of Asian eyes with the Scheimpflug imaging camera. Patients and meth...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Lim HB, Tan GS, Lim L, Htoon HM
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2014
Materias:	Ophthalmology RE1-994
Acceso en línea:	https://doaj.org/article/06e5b87e457f4cc486e76b6571c83bca
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:06e5b87e457f4cc486e76b6571c83bca
record_format	dspace
spelling	oai:doaj.org-article:06e5b87e457f4cc486e76b6571c83bca2021-12-02T01:25:46ZComparison of keratometric and pachymetric parameters with Scheimpflug imaging in normal and keratoconic Asian eyes1177-5483https://doaj.org/article/06e5b87e457f4cc486e76b6571c83bca2014-11-01T00:00:00Zhttp://www.dovepress.com/comparison-of-keratometric-and-pachymetric-parameters-with-scheimpflug-peer-reviewed-article-OPTHhttps://doaj.org/toc/1177-5483 Hou-Boon Lim,1 Gavin Tan,1 Li Lim,1 Hla Myint Htoon2 1Singapore National Eye Centre, Singapore; 2Singapore Eye Research Institute, Singapore Purpose: To evaluate the keratometric and pachymetric parameters of keratoconic corneas of Asian eyes with the Scheimpflug imaging camera. Patients and methods: This is a cross-sectional study of 22 eyes with Amsler-Krumeich stage 1 keratoconus and 48 eyes from normal subjects conducted in a tertiary eye hospital. A rotating Scheimpflug imaging system, the Pentacam, was used to evaluate all eyes for tomographic parameters, as well as pachymetric progression indices (PPI) and Ambrósio relational thickness (ART). Results: All PPI and ART parameter values were significantly different between study and control groups. Cornea minimum radius of curvature, absolute distance from corneal apex to thinnest location, as well as the distance from corneal apex to thinnest location in Y-axis also demonstrated statistically significant differences. The mean ART values for keratoconus eyes were 241 µm (ART-maximum) and 352 µm (ART-average), falling within previously reported best cutoff values for detecting keratoconus. On receiver operating characteristics curve analysis, the area under the curve values were highest for PPI and ART parameters. Conclusion: There are significant differences in tomographic parameters between stage 1 keratoconic and normal Asian eyes. Pachymetric indices such as the PPI and the ART index can serve as additional tools in differentiating keratoconic from normal eyes. The findings validate the usefulness of the ART in identifying keratoconic eyes in Asians. Keywords: keratoconus, pentacam, corneal tomography, Ambrósio relational thicknessLim HBTan GSLim LHtoon HMDove Medical PressarticleOphthalmologyRE1-994ENClinical Ophthalmology, Vol 2014, Iss default, Pp 2215-2220 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	Ophthalmology RE1-994
spellingShingle	Ophthalmology RE1-994 Lim HB Tan GS Lim L Htoon HM Comparison of keratometric and pachymetric parameters with Scheimpflug imaging in normal and keratoconic Asian eyes
description	Hou-Boon Lim,1 Gavin Tan,1 Li Lim,1 Hla Myint Htoon2 1Singapore National Eye Centre, Singapore; 2Singapore Eye Research Institute, Singapore Purpose: To evaluate the keratometric and pachymetric parameters of keratoconic corneas of Asian eyes with the Scheimpflug imaging camera. Patients and methods: This is a cross-sectional study of 22 eyes with Amsler-Krumeich stage 1 keratoconus and 48 eyes from normal subjects conducted in a tertiary eye hospital. A rotating Scheimpflug imaging system, the Pentacam, was used to evaluate all eyes for tomographic parameters, as well as pachymetric progression indices (PPI) and Ambrósio relational thickness (ART). Results: All PPI and ART parameter values were significantly different between study and control groups. Cornea minimum radius of curvature, absolute distance from corneal apex to thinnest location, as well as the distance from corneal apex to thinnest location in Y-axis also demonstrated statistically significant differences. The mean ART values for keratoconus eyes were 241 µm (ART-maximum) and 352 µm (ART-average), falling within previously reported best cutoff values for detecting keratoconus. On receiver operating characteristics curve analysis, the area under the curve values were highest for PPI and ART parameters. Conclusion: There are significant differences in tomographic parameters between stage 1 keratoconic and normal Asian eyes. Pachymetric indices such as the PPI and the ART index can serve as additional tools in differentiating keratoconic from normal eyes. The findings validate the usefulness of the ART in identifying keratoconic eyes in Asians. Keywords: keratoconus, pentacam, corneal tomography, Ambrósio relational thickness
format	article
author	Lim HB Tan GS Lim L Htoon HM
author_facet	Lim HB Tan GS Lim L Htoon HM
author_sort	Lim HB
title	Comparison of keratometric and pachymetric parameters with Scheimpflug imaging in normal and keratoconic Asian eyes
title_short	Comparison of keratometric and pachymetric parameters with Scheimpflug imaging in normal and keratoconic Asian eyes
title_full	Comparison of keratometric and pachymetric parameters with Scheimpflug imaging in normal and keratoconic Asian eyes
title_fullStr	Comparison of keratometric and pachymetric parameters with Scheimpflug imaging in normal and keratoconic Asian eyes
title_full_unstemmed	Comparison of keratometric and pachymetric parameters with Scheimpflug imaging in normal and keratoconic Asian eyes
title_sort	comparison of keratometric and pachymetric parameters with scheimpflug imaging in normal and keratoconic asian eyes
publisher	Dove Medical Press
publishDate	2014
url	https://doaj.org/article/06e5b87e457f4cc486e76b6571c83bca
work_keys_str_mv	AT limhb comparisonofkeratometricandpachymetricparameterswithscheimpflugimaginginnormalandkeratoconicasianeyes AT tangs comparisonofkeratometricandpachymetricparameterswithscheimpflugimaginginnormalandkeratoconicasianeyes AT liml comparisonofkeratometricandpachymetricparameterswithscheimpflugimaginginnormalandkeratoconicasianeyes AT htoonhm comparisonofkeratometricandpachymetricparameterswithscheimpflugimaginginnormalandkeratoconicasianeyes
_version_	1718403055503802368

Comparison of keratometric and pachymetric parameters with Scheimpflug imaging in normal and keratoconic Asian eyes

Ejemplares similares