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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Predictive value of various IOL power calculation formulae used in paediatric cataract surgery

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Session Details

Session Title: Paediatric Cataract Surgery

Session Date/Time: Tuesday 13/09/2016 | 08:00-10:30

Paper Time: 09:32

Venue: Hall C1

First Author: : R.Deshpande INDIA

Co Author(s): :    K. Dole   M. Deshpande                 

Abstract Details


To evaluate the predictive value and accuracy of various formulae used for IOL power calculation in pediatric patients undergoing cataract surgery.


A tertiary eye care centre in western India.


This Prospective, non-randomized, observational study was conducted at a tertiary eye care centre. All patients from age 1 to 18 years undergoing cataract surgery with in the bag implantation of IOL were included. Biometry was done and IOL power was calculated using SRK-T, SRKII, Hoffer-Q, and Holladay-I formulae. IOL implantation was done according to the SRK-T after undercorrection using guidelines of Enyedi et al. Post operatively spherical equivalent was calculated at 5 weeks and mean absolute prediction error (APE) of each formula was calculated.


63 eyes of 41 patients. 76% males, 53.70% had bilateral cataract and 36.5% less than 5 years old. Mean age at surgery was 7.17 ±4.27 years. Mean APE lowest with SRKT formula was 1.04 D, HofferQ 1.91 D, 1.06 D with SRKII and 1.91 D with HolladayI. Deviation of greater than ±1 D from the expected refraction seen in 29.78% patients with SRKT, 61.70 % patients with HofferQ, 31.91% with SRKII and 42.55% with HolladayI. Age, Keratometry, ACD and corneal astigmatism affected the accuracy of formulas whereas axial length and lens thickness had no influence on accuracy of any formula.


There was no significant difference in the predictive accuracy between SRK-T, SRK II and Holladay-I but Hoffer-Q yielded significantly high error. The variables included in the study showed inconsistent effect on accuracy of various formulae. The SRK-T formula had the least overall Mean APE and thus we recommend SRK-T formula for IOL power calculation in pediatric cataract patients. However, further studies are needed to determine the most accurate formula in pediatric patients.

Financial Disclosure:


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