Posters

Comparison of horizontal corneal diameter by the Atlas corneal topography system and IOLMaster

Poster Details

First Author: A.Gonçalves BRAZIL

Co Author(s):    B. Gomes   T. Valadao                 

Abstract Details

Purpose:

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

Setting:

Ophtalmology Group at Corneal Department of the Federal Hospital of Bonsucesso situated in Rio de Janeiro – Brazil.

Methods:

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.

Results:

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.

Conclusions:

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.

Financial Disclosure:

None