Comparison of Two Different Scheimpflug Devices in the Detection of Keratoconus, Regular Astigmatism, and Healthy Corneas

Comparison of Two Different Scheimpflug Devices in the Detection of Keratoconus, Regular Astigmatism, and Healthy Corneas

Aim. The aim of this study was to determine the intra- and interobserver variability of two Scheimpflug based camera systems, Pentacam and Sirius. In addition, the comparability of the measurements was tested in healthy subjects, subjects with regular astigmatism, and keratoconus patients. Methods....

Full description

Saved in:
Bibliographic Details
Published in:Journal of Ophthalmology Vol. 2015; no. 2015; pp. 525 - 530
Main Authors: Schrader, Stefan, Borrelli, Maria, Karbe, Maria, Ralla, Bernhard, Finis, David, Geerling, Gerd
Format: Journal Article
Language:English
Published: Cairo, Egypt Hindawi Limiteds 01-01-2015
Hindawi Publishing Corporation
John Wiley & Sons, Inc
Hindawi Limited
Subjects:
Age
Astigmatism
Cameras
Care and treatment
Cornea
Diagnosis
Keratoconus
Statistical analysis
Topography
Ultrasonic imaging
Germany
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Aim. The aim of this study was to determine the intra- and interobserver variability of two Scheimpflug based camera systems, Pentacam and Sirius. In addition, the comparability of the measurements was tested in healthy subjects, subjects with regular astigmatism, and keratoconus patients. Methods. Intra- and interobserver variability were assessed in 20 healthy corneas. Pachymetry values were also compared with ultrasound pachymetry as a reference measurement. To detect possible differences between the two devices, 82 eyes with clinically established keratoconus, 30 eyes with regular astigmatism (>1.5 D), and 60 eyes without corneal pathologies were included in this prospective study. Results. Pachymetry and keratometry showed good intra- and interobserver variability for both devices. Pachymetry values obtained with the Sirius system ( 579 ± 58 μm) were significantly higher compared to the Pentacam system ( 551 ± 40 μm, P < 0.001 ) and to ultrasound pachymetry ( 550 ± 43 μm, P < 0.001 ). Significant interdevice differences were found regarding the majority of the detected keratometry parameters. Conclusions. Both devices show almost perfect reproducibility in healthy subjects. However, pachymetry and keratometry values of the two devices should not be used interchangeably.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Academic Editor: Majid M. Moshirfar
ISSN:2090-004X
2090-0058
DOI:10.1155/2015/315281