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....
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | Journal of Ophthalmology |
| Online Access: | http://dx.doi.org/10.1155/2015/315281 |
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| author | David Finis Bernhard Ralla Maria Karbe Maria Borrelli Stefan Schrader Gerd Geerling |
| author_facet | David Finis Bernhard Ralla Maria Karbe Maria Borrelli Stefan Schrader Gerd Geerling |
| author_sort | David Finis |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-e396c5b4bb9c43689eff043cbac593f1 |
| institution | Kabale University |
| issn | 2090-004X 2090-0058 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Ophthalmology |
| spelling | doaj-art-e396c5b4bb9c43689eff043cbac593f12025-02-03T05:58:14ZengWileyJournal of Ophthalmology2090-004X2090-00582015-01-01201510.1155/2015/315281315281Comparison of Two Different Scheimpflug Devices in the Detection of Keratoconus, Regular Astigmatism, and Healthy CorneasDavid Finis0Bernhard Ralla1Maria Karbe2Maria Borrelli3Stefan Schrader4Gerd Geerling5Department of Ophthalmology, Heinrich-Heine-University Düsseldorf, Moorenstraße 5, 40225 Düsseldorf, GermanyDepartment of Ophthalmology, Heinrich-Heine-University Düsseldorf, Moorenstraße 5, 40225 Düsseldorf, GermanyDepartment of Ophthalmology, Heinrich-Heine-University Düsseldorf, Moorenstraße 5, 40225 Düsseldorf, GermanyDepartment of Ophthalmology, Heinrich-Heine-University Düsseldorf, Moorenstraße 5, 40225 Düsseldorf, GermanyDepartment of Ophthalmology, Heinrich-Heine-University Düsseldorf, Moorenstraße 5, 40225 Düsseldorf, GermanyDepartment of Ophthalmology, Heinrich-Heine-University Düsseldorf, Moorenstraße 5, 40225 Düsseldorf, GermanyAim. 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.http://dx.doi.org/10.1155/2015/315281 |
| spellingShingle | David Finis Bernhard Ralla Maria Karbe Maria Borrelli Stefan Schrader Gerd Geerling Comparison of Two Different Scheimpflug Devices in the Detection of Keratoconus, Regular Astigmatism, and Healthy Corneas Journal of Ophthalmology |
| title | Comparison of Two Different Scheimpflug Devices in the Detection of Keratoconus, Regular Astigmatism, and Healthy Corneas |
| title_full | Comparison of Two Different Scheimpflug Devices in the Detection of Keratoconus, Regular Astigmatism, and Healthy Corneas |
| title_fullStr | Comparison of Two Different Scheimpflug Devices in the Detection of Keratoconus, Regular Astigmatism, and Healthy Corneas |
| title_full_unstemmed | Comparison of Two Different Scheimpflug Devices in the Detection of Keratoconus, Regular Astigmatism, and Healthy Corneas |
| title_short | Comparison of Two Different Scheimpflug Devices in the Detection of Keratoconus, Regular Astigmatism, and Healthy Corneas |
| title_sort | comparison of two different scheimpflug devices in the detection of keratoconus regular astigmatism and healthy corneas |
| url | http://dx.doi.org/10.1155/2015/315281 |
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