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Predictability and accuracy of IOL formulas in high myopia

Poster Details

First Author: A.saif EGYPT

Co Author(s):    P. Saif              

Abstract Details


To study the Predictability and accuracy of different intraocular lens calculation formulas in high myopia patients with axial length(AL) ≥26.0 mm or spherical equivalent (SE) refraction more than 6 diopter undergoing phacoemulsification.


Multicenter study in Beni Suef University hospital, Fayoum university hospital and MUST hospital in Egypt


the study comprised 215 eyes of patients presented with cataract divided into group A : with AL ≥ 26 mm and group B: with AL more than 26 mm. All eyes had SE refraction more than 6 diopter. Immersion ultrasound A-scan technique and auto-keratometry. The IOL power calculated using the Haigis, SRK-T, Holladay, Hoffer-Q, Binkhorst and SRK-II formulas.. Analyzing the differences between actual postoperative refraction and target refraction by different formulas. P value < 0.05 considered statistically significant.


The Mean age was 54.0 ±8.0 years and 54.0±11.0 years for group A& B . The mean AL was 27.69 ±2.42 mm. The average k reading was 44.82 ±1.82 and 43.63±2.74 . the pre SE -9.78±3.24 D & -12.5±4.21 D (from -5.5 – 22.38 D). the mean error were Haigis -0.46 ±0.58 D&+0.12±0.73D, Holladay -0.34 ±0.83 D &0.66±0.77D , SRK/T -0.23 ±0.60 D & 0.24±0.80 D , Hoffer-Q 0.01 ±0.76 D & 0.69±0.74D, Binkhorst 0.07 ±0.78 D & 0.69±0.73 and SRK-II -0.45±0.74D & - 0.46 ±1.56 D.


Haigis formula showed the best result in myopic eyes with axial length more than 26 mm while SRK-II shows the best in axial length less than 26 mm. FINANCIAL DISCLOUSRE: NONE

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