Comparison of the biometric measurements obtained using IOL Master and ALADDIN systems

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Abstract

Purpose

To compare anterior segment measurements of two optical systems of patients with clear lens and cataract

Methods

34 cataractous eyes and 32 eyes with clear lens were examined using the Zeiss IOL-Master and Topcon Aladdin system. In all eyes we measured Axial Length (AL), Keratometry (K1, K2) and Anterior chamber depth (ACD). The results were compared and analysed using Bland-Altman plots

Results

Comparison of the eye lengths, as well as of the keratometric and ACD measurements showed good correlation and agreement between the measurements obtained by both methods. Standard Deviation (SD) for Axial Length difference is about 0,034 for clear lens eyes and 0,028 for cataractous eyes. SD for K1 and K2 difference is for clear lens eyes 0,23/0,29 and 0,17/0,18 for cataractous eyes. ACD differences are respectively 0,11 and 0,15

Conclusion

The comparisons between IOL Master and the ALADDIN show a very good alignment for Axial Length for both groups of patients. There was also acceptable alignment for K1, K2 and ACD measurement. Both the analyzed instruments show a good correlation and precision

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