Título

COMPARISON OF HORIZONTAL CORNEAL DIAMETER BY THE ATLAS CORNEAL TOPOGRAPHY AND IOL MASTER

Objetivo

To compare white-to-white horizontal corneal diameter (WTW) measurements using Zeiss Atlas Corneal Topography and Zeiss IOL master 500 model in general patients.

Método

WTW distance were measured with the Atlas Topography and IOLMaster 500 in 361 eyes of 181 patients. Statistical evaluation was performed using the paired t test, Pearson correlation, and Bland-Altman analysis for comparison of measurement techniques.

Resultado

The mean WTW distance measurements with the Atlas topography and IOL Master 500 were 12.26 ± 0.55 mm and 12.09 ± 0.44 mm, respectively (t=6.93; P < 0.0001). The mean WTW difference between the two devices was 0.17mm (95% confidence interval of mean difference: 0.12 – 0.22mm). The Pearson correlation coefficient between the two devices was 0.61.

Conclusão

There was a statistically significant difference between the mean values of WTW measured with the Atlas Topography and IOL Master 500. These devices should not be used interchangeably regarding WTW measurement.