Corneal And Epithelial Thickness Measurements Agreement Of Two Different Oct
Published 2023 - 41st Congress of the ESCRS
Reference: PP12.07 | DOI: 10.82333/6m1h-px16
Authors: Suphi Taneri* 1 , Burcu Yücekul 2 , Anika Förster 3 , H. Burkhard Dick 4
1Eye Department at St. Franzis Hospital,Center for Refractive Surgery,Münster,Germany;Ruhr-University Bochum,Bochum,Germany, 2Department of Ophthalmology,Haseki Training and Research Hospital,Istanbul,-, 3Eye Department at St. Franzis Hospital,Center for Refractive Surgery,Münster,Germany, 4Ruhr-University Bochum,Bochum,Germany
To compare the epithelial and pachymetric thickness-based parameters of two different Fourier-domain optical coherence tomography (OCT) devices and to find out whether they can be used interchangeably.
Tertiary care refractive surgery center
Retrospective comparative study. This study comprises 24 normal consecutive eyes and 32 consecutive post-SMILE eyes that had corneal thickness and epithelial thickness maps obtained with two different OCT devices (Cirrus5000, Carl Zeiss Meditec, Germany and AvantiRTVue100, OptoVue Inc, USA). The mutual parameters of both OCTs were examined: minimum (Pachy min) corneal thickness (CT), minimum CT minus median CT (Pachy min-med), average CT of the superonasal octant minus the average CT of the inferotemporal octant (Pachy SN-IT), average CT of the superior octant minus average CT of the inferior octant (Pachy S-I), minimum epithelial thickness (Epi min) and maximum epithelial thickness (Epi max).
Pachy min and Epi max measurements were in good agreement between the two devices (ICC was 0.906 and 0.839, respectively). In the normal eyes group, there was a significant correlation in Pachy min (p=0.040), Pachy min-med (p=0.033), and Epi max (p<0.001). In the post-SMILE group, only Pachy min and Epi max measurements (p<0.001 for both) had a significant correlation between the two devices.
Anterior segment OCT is a valuable method to evaluate the quantitative corneal and epithelial thickness measurements. However, the measurements may differ between devices, and they may not be used interchangeably.