2008 Volume 29 Issue 3 Pages 103-106
Purpose: We evaluated the clinical reproducibility of interobserver and intraobserver data obtained using the newly developed anterior segment optical coherence tomography (OCT) VisanteTM (Carl Zeiss Meditec). We also considered the differences between the two measurement modes.
Methods: Observed in this study were 21 eyes of 11 subjects (mean age: 31.2±8.2 years) with no ocular disease other than refractive error. The central corneal thickness (CCT) and the anterior chamber depth (ACD) of each subject was measured by two examiners, five times each. The data from CCT measurements taken by automated and manual modes, the pachymetry scan and the anterior segment scan using a caliper were also compared.
Results: The average CCT was 535.6±2.0μm (observer A) and 533.7±2.4μm (observer B) in automated mode, and 556.1±0.3μm (observer A) and 549.5±0.2μm (observer B) in manual mode. The average ACD was 3.728±0.017mm (observer A) and 3.729±0.022mm (observer B). The maximum difference between interobserver data in automated mode was 8.8μm; that in manual mode was 50.0μm (CCT) and 70μm (ACD). There was no significant difference in interobserver data between automated and manual modes.
Conclusions: The reproducibility of VisanteTM is highly appreciated; it is a useful tool for various anterior segment analyses.
