Effect Of Segmented Optical Axial Length On The Performance Of A New-Generation Intraocular Lens Power Calculation Formula
Published 2026 - 44th Congress of the ESCRS
Reference: POCAT629 | Type: Free paper | DOI: 10.82333/y6hs-z561
Authors: Dr Vaishali Abhay A Vasavada* 1 , Dr Jash Bavishi 2 , Dr Lajja Shastri 2 , Dr Shail Vasavada 2 , Dr Vandana Nath 2 , Dr Abhay Vasavada 2
1Raghudeep Eye Hospital,Jaipur,India, 2Raghudeep Eye Hospital,Ahmedabad,India
Purpose
To evaluate the performance of the Barrett Universal formula with segmented axial length (AL) compared to traditional composite AL
Setting
Iladevi Cataract & IOL Reserach Centre
Methods
Consecutive patients who underwent uncomplicated cataract surgery. The composite axial length (AL) was measured with a swept-source optical coherence tomography (SS-OCT) biometer using a mean refractive index. The segmented AL was calculated by summing the geometric lengths of the ocular segments (cornea, aqueous, lens, and vitreous) using multiple specific refractive indices based on the data obtained by the SS-OCT-based biometer. Manifest refraction was measured at three months postoperatively, and the prediction error of refraction was calculated with two ALs for each formula. Eyes were classified based
Results
The study included 50 eyes of 50 patients. The segmented AL was shorter than the composite AL. The study is ongoing and final results will be updated at the time of presentation.
Conclusions
Based on preliminary results, it appears that the TAL enhances the accuracy of the Barrett formula.