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Rotating Scheimpflug Imaging Indices in Different Grades of Keratoconus
Joint Authors
Wahba, Sherine S.
Roshdy, Maged M.
Elkitkat, Rania S.
Naguib, Karim M.
Source
Issue
Vol. 2016, Issue 2016 (31 Dec. 2016), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2016-08-08
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
Purpose.
To evaluate accuracy of various Keratoconus (KC) screening indices, in relation to Topographic Keratoconus (TKC) grading.
Setting.
Al Watany Eye Hospital, Cairo, Egypt.
Methods.
Data of 103 normal (group 1) and 73 KC eyes (group 2), imaged by Pentacam (branded as Allegro Oculyzer), were analysed.
Group 2 was divided into 2a: 14 eyes (TKC = 1, early KC), 2b: 25 eyes (TKC = 1 to 2 or 2, moderate KC), and 2c: 34 eyes (TKC = 2 to 3 up to 4, severe KC).
Participants were followed up for six years to confirm diagnosis.
Area under the receiver operating characteristic curve (AUROC) was calculated for evaluated curvature, elevation, and pachymetry indices with various reference shapes at different diameters.
Results.
When comparing normal to KC eyes, ten indices had significantly higher AUROC.
Only five of them had significantly higher AUROC in early KC compared to normal corneas: Pachymetry Progression Index- (PPI-) Maximum (Max), Ambrósio’s Relational Thickness- (ART-) Max, PPI-Max minus PPI-Minimum (Min), central corneal thickness (CCT), and diagonal decentration of thinnest point from the apex (AUROC = 0.690, 0.690, 0.687, 0.683, and 0.674, resp.).
Conclusion.
Generally, ten pachymetry and elevation-based indices had significantly higher AUROC.
Five indices had statistically significant high AUROC when comparing early KC to normal corneas.
American Psychological Association (APA)
Wahba, Sherine S.& Roshdy, Maged M.& Elkitkat, Rania S.& Naguib, Karim M.. 2016. Rotating Scheimpflug Imaging Indices in Different Grades of Keratoconus. Journal of Ophthalmology،Vol. 2016, no. 2016, pp.1-9.
https://search.emarefa.net/detail/BIM-1110025
Modern Language Association (MLA)
Wahba, Sherine S.…[et al.]. Rotating Scheimpflug Imaging Indices in Different Grades of Keratoconus. Journal of Ophthalmology No. 2016 (2016), pp.1-9.
https://search.emarefa.net/detail/BIM-1110025
American Medical Association (AMA)
Wahba, Sherine S.& Roshdy, Maged M.& Elkitkat, Rania S.& Naguib, Karim M.. Rotating Scheimpflug Imaging Indices in Different Grades of Keratoconus. Journal of Ophthalmology. 2016. Vol. 2016, no. 2016, pp.1-9.
https://search.emarefa.net/detail/BIM-1110025
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1110025