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Intraocular lens power calculation by measuring axial length with partial optical coherence and ultrasonic biometry in Middle East children

Poster Details

First Author: M.Kamel EGYPT

Co Author(s):    M. Ramadan   A. Swalium   M. Omar              

Abstract Details


: To compare the achieved refractive outcomes of patients undergoing cataract surgery with intraocular lens (IOL) power calculation performed by conventional immersion ultrasound (US) or partial coherence interferometry (PCI).


Faculty of medicine Ain Shams University Cairo Egypt


Prospective, comparative case series. Include 120 eyes Patients undergoing cataract surgery were randomly divided in two groups with regard to the IOL power calculation method. Group 1 had calculations performed by PCI (IOL Master; Carl Zeiss Meditec), while US was used in Group 2 (Ultrascan; Alcon), using the Holladay 1 formula. Differences between target and achieved refractions were then compared.


Our study comprised 120eyes from79patients. Biometry with PCI was used in 50 eyes. US was used in 70eyes. Mean age of patients in the PCI Group was 69.8�Â�±13.1 years and 70.0�Â�±9.3in the US Group (P=0.7165). Mean axial length measured by PCI was 23.22�Â�±1.00 mm and that by US was 23.22�Â�±1.06 mm (P=0.9110). Mean absolute error in the PCI group was 0.15�Â�±0.33 D and that in the US group was 0.26�Â�±0.48 D (-1.05 - 1.76).All eyes in the PCI group and 94.3% of those in the US group were within 1.0 D of the planned refraction


Although both PCI and US yielded good prediction in IOL power calculation, the PCI group tended to show better more accuracy and improved refractive and visual outcome

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