Copenhagen 2016 Registration Programme Exhibitor Information Virtual Exhibition Satellite Meetings Glaucoma Day 2016 Hotel Star Alliance

10 - 14 Sept. 2016, Bella Center, Copenhagen, Denmark

This Meeting has been awarded 27 CME credits


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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


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.


Kocatepe University Medical School Department of Ophthalmology


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.


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).


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

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