Comparison of central corneal thickness measurements obtained by OrbscanIIz® and ultrasound pachymetry: A concordance study in the usual clinical practice

José L Romero-Trevejo; Andrés Sánchez-Pérez; Erika Muñoz-García; Lourdes Fernández-Romero; Manuel F Jiménez-Navarro

doi:10.4103/sjopt.Sjopt_82_21

Comparison of central corneal thickness measurements obtained by OrbscanIIz^® and ultrasound pachymetry: A concordance study in the usual clinical practice

Saudi J Ophthalmol. 2023 Mar 9;37(1):10-14. doi: 10.4103/sjopt.Sjopt_82_21. eCollection 2023 Jan-Mar.

Authors

José L Romero-Trevejo^{1

2}, Andrés Sánchez-Pérez³, Erika Muñoz-García³, Lourdes Fernández-Romero⁴, Manuel F Jiménez-Navarro^{2

3

4

5}

Affiliations

¹ Department of Ophthalmology. Virgen de la Victoria University Hospital, Malaga, Spain.
² Department of Medicine and Dermatology, School of Medicine, University of Malaga, Malaga, Spain.
³ Department of Heart and Cardiovascular Pathology, Virgen de la Victoria University Hospital, Malaga, Spain.
⁴ Malaga Biomedical Research Institute-IBIMA, Virgen de la Victoria University Hospital, Malaga, Spain.
⁵ CIBERCV Cardiovascular Diseases, Carlos III Health Institute, Madrid, Spain.

Abstract

Purpose: The objective of this study was to assess the concordance between the values obtained in measuring central corneal thickness using the OrbscanIIz^® and the contact ultrasonic pachymeter available in our public ophthalmology service.

Methods: Measurements were taken from 88 eyes of 44 patients using the two instruments. The data obtained were statistically analyzed using version 22 of the IBM SPSS^® program.

Results: The mean of central corneal thickness measurements obtained from OrbscanIIz^® was significantly higher than that obtained from ultrasound pachymetry. However, the mean of differences between both instruments was only 7.22 μ, which could be considered a clinically insignificant result when considering the good concordance obtained between both systems.

Conclusion: OrbscanIIz^® and ultrasound pachymetry can be interchangeable in the usual public clinical practice when measuring central corneal thickness. This is the first research found in the literature that uses a concordance study to compare the data resulting from central corneal thickness measurements obtained by an OrbscanIIz^® and an OcuScan^® pachymeter in our environment.

Keywords: Bland–Altman plot; central corneal thickness; concordance; corneal topography; ultrasound pachymetry.