Posters
Comparison of anterior segment measurements obtained by optical low coherence interferometer and corneal topography using combined Scheimpflug-placido disk
Poster Details
First Author: U. Inan TURKEY
Co Author(s): O. Polat Z. Baysal S. Ozcan S. Inan
Abstract Details
Purpose:
To assess the congruity of anterior segment parameters measurements between Aladdin optical biometer using optical low coherence interferometer and Sirius corneal topography using combined Scheimpflug-Placido disk.
Setting:
Kocatepe University Medical School Department of Ophthalmology
Methods:
A retrospective data analysis was made in 110eyes of 59 healthy subjects without any ocular pathology except refractive error. All measurements were undertaken by using the both devices (Aladdin optical biometer and Sirius corneal topography). Evaluation of each patient by both devices was made consecutively at the same time. Readings of anterior chamber depth (ACD), flat (K1) and steep (K2) keratometry, and white-to-white (WTW) distance measured by both the Aladdin and Sirius were recorded and compared.
Results:
The mean age of the patients was 47.31±18.57 years (range, 25 to 79 years). The mean ACD values for optical biometer and corneal topography were 3.35±0.4 mm and 3.42±0.44 mm, respectively. The mean difference in ACD was 0.075 mm and it was higher in Sirius than Aladdin (p<0.001). K1 keratometry measurement obtained by Aladdin was 0.409 D higher (p<0.001). No statistically significant differences were detected between the two devices in respect to K2 and WTW measurements (p=0.18, p=0.85 respectively). Pearson correlation analysis showed high correlation between the 2 devices for all measurements (r=0.985, 0.895, 0.961 and 0.766, p<0.001, respectively).
Conclusions:
Anterior segment parameters obtained by Aladdin optical biometer and Sirius anterior segment analysis system were correlated well with each other and measurement differences between the devices were clinically negligible except K1 keratometry values
Financial Disclosure:
NONE
