Inter-changeability Between Anterior Segment Optical Coherence Tomography and Scheimpflug Imaging in the Evaluation of Corneal Opacity

Amr Mounir1, *, Marwa Mahmoud Abdellah1, Omar Fawzy Zidan2, Engy Mohamed Mostafa1
1 Department of Ophthalmology, Faculty of Medicine, Sohag University, Sohag, Egypt
2 Sohag Ophthalmology Hospital, Sohag, Egypt

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© 2022 Mounir et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Department of Sohag, Faculty of Medicine Ophthalmology, Almohafza Street, Sohag City, Mailbox: 82511 Egypt; Tel: 00201005026170; E-mail:



To compare the results of corneal evaluation, either the total corneal thickness and corneal opacity depth by both technologies AS- OCT and Scheimpflug imaging by Sirius Scheimpflug placido topography.


sixty-eight eyes of sixty- eight consecutive patients with corneal opacities were examined by both AS-OCT and Sirius Scheimpflug imaging. Corneal thickness and corneal opacity depth were measured and compared determining the interchangeability using Bland–Altman plotting.


Total corneal thickness was (470.32±62.10) and (463.47±56.47) by AS. OCT and Sirius Scheimpflug imaging, respectively (P value = 0.8).

While the actual measurement of corneal opacity, corneal opacity depth was (135.39±119) and (85.45±128) by AS-OCT and Siris Scheimpflug imaging respectively with P value (0.004).


AS-OCT and Scheimpflug imaging Sirius may be used interchangeably for measuring both total corneal thickness, while in the determination of corneal opacity depth. the AS-OCT is superior to Scheimpflug imaging in the accuracy of determination of actual boundaries of the corneal opacity.

Keywords: Scheimpflug tomography, Anterior segment optical, Coherence tomography, Corneal opacity, Corneal imaging, Cornea.