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Comparing the accuracy of optical low coherence reflectometry versus partial coherence interferometry

Poster Details

First Author: H.Helaly EGYPT

Co Author(s):    A. El-Massry              

Abstract Details



Purpose:

To compare biometric measurements obtained with the IOLMaster partial coherence interferometry biometer and the Lenstar optical low coherence reflectometry biometer.

Setting:

Ophthalmology Department, Faculty of Medicine, Alexandria University, Egypt.

Methods:

This prospective study included 50 eyes of 50 patients scheduled for cataract surgery. One eye of each patient was evaluated using both IOLMaster (Software version 5.4) and Lenstar LS 900 (Software version 2.20) biometers. Axial length, ACD, and K readings were measured and recorded. The IOL prediction error was calculated.

Results:

The mean axial length measured by the Lenstar LS 900 was longer than that of IOLMaster by 0.0142 mm (P = 0.086). The mean K readings measured by the Lenstar LS 900 was flatter than that of IOLMaster by 0.085 D (P = 0.012). The mean ACD measured by the Lenstar LS 900 was deeper than that of IOLMaster by 0.057 mm (P < 0.0001). Using the SRK/T formula, the mean absolute error with Lenstar LS 900 was lower than that of IOLMaster by 0.044 D (P = 0.024). While using the Haigis formula, the mean absolute error with Lenstar LS 900 was lower than that of IOLMaster by 0.026 D but was not statistically significant (P = 0.278). For both formulas, the IOL prediction error of all cases was within + 2 D.

Conclusions:

Both Lenstar LS 900 and IOLMaster yielded accurate results for IOL power calculation. Lenstar LS 900 provides additional data e.g. lens thickness that can be used in other IOL power calculation formulas as Holladay II.

Financial Disclosure:

NONE

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