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 IOL power calculation formulas using Lenstar in patients with different axial lengths

Poster Details

First Author: S. Aslan-Bayhan TURKEY

Co Author(s):    H. Bayhan                    

Abstract Details


To evaluate and compare accuracy of different intraocular lens (IOL) power calculation formulas using Lenstar in eyes with various axial length (AXL).


Bozok University Faculty of Medicine, Ophthalmology Department, Yozgat, Turkey.


165 eyes of 165 patients having uncomplicated phacoemulsification and IOL implantation were included to this prospective study. Biometric measurements were performed with the optical low-coherence reflectometry (Lenstar). The patients were divided into short (<22 mm), average (22-25 mm) and long (>25 mm) AXL groups according to their preoperative AXL measurements. Postoperative refraction results compared with the predicted refractions calculated using Olsen, SRK/T, Holladay II, Hoffer Q and Haigis for each AXL group. The mean and median absolute errors (MAE, MedAE) and percentage of eyes within, ±0.50 D of predicted refraction and deviating over ±1.00 D of predicted refraction were calculated.


In average AXL group, there was no statistically significant difference in MAE and MedAE among the formulas. The MAE was 0.34±0.37 D in Haigis, 0.38±0.36 D in Olsen, 0.35±0.32 D in Holladay II and 0.37±0.39 D in SRK/T, respectively. In the long AXL group, the Haigis achieved the lowest value of MAE (0.32±0.36 D) followed by the SRK-T (p<0.05 for Haigis versus Hoffer-Q). In the short AXL group, the percentage of eyes within ±0.50 D of predicted refraction was higher with the Haigis (77%) than the other formulas including the Hoffer-Q (64%).


When choosing the IOL power, selecting the appropriate formulas would optimize the refractive results.

Financial Disclosure:


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