Publication: Precision analysis of posterior corneal topography measured by Visante Omni: Repeatability, reproducibility, and agreement with orbscan II
Issued Date
2012-02-01
Resource Type
ISSN
19382391
1081597X
1081597X
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2-s2.0-84857012530
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Mahidol University
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SCOPUS
Bibliographic Citation
Journal of Refractive Surgery. Vol.28, No.2 (2012), 133-138
Suggested Citation
Sabong Srivannaboon, Suksri Chotikavanich, Chareenun Chirapapaisan, Sirilux Kasemson, Wasin Po-ngam Precision analysis of posterior corneal topography measured by Visante Omni: Repeatability, reproducibility, and agreement with orbscan II. Journal of Refractive Surgery. Vol.28, No.2 (2012), 133-138. doi:10.3928/1081597X-20111122-03 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/14975
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Title
Precision analysis of posterior corneal topography measured by Visante Omni: Repeatability, reproducibility, and agreement with orbscan II
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Abstract
PURPOSE: To evaluate the repeatability and reproducibility of posterior corneal curvature and posterior corneal elevation best-fit sphere (BFS) obtained with the Visante Omni (Carl Zeiss Meditec) and to compare the results with the Orbscan II (Bausch & Lomb). METHODS: Thirty eyes from 30 healthy volunteers were included in this study. All patients were examined 5 times with the Visante Omni and Orbscan II by 2 independent operators. The posterior corneal curvature (3-and 6-mm zone) and posterior corneal elevation BFS (5- and 8-mm zone) were generated for each system. Intraoperator repeatability and interoperator reproducibility and agreement between the systems were evaluated using the intraclass correlation coefficient (ICC) and the Bland-Altman method. RESULTS: The repeatability of posterior corneal curvature and posterior corneal elevation BFS measured by the Visante Omni was high for all analysis zones (ICC, 0.99 to 1.00). The reproducibility also showed similar results (ICC, 0.99 to 1.00). Agreement between the Visante Omni and Orbscan II was high for posterior corneal curvature (ICC, 0.94 to 0.97) and posterior corneal elevation BFS (ICC, 0.96 to 0.98) with 95% limits of agreement at -0.26 to 0.22 diopters for posterior corneal curvature and 0.11 to 0.69 mm for posterior corneal elevation BFS. CONCLUSIONS: The Visante Omni provides good repeatability and reproducibility of posterior corneal topography. Overall agreement with the Orbscan II system was high. Copyright © SLACK Incorporated.