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

Abstract

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. 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. 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. 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.