Posters

Comparison of IOLMaster 500 and Lenstar 900 for IOL power calculation in paediatric cataract surgery

Poster Details

First Author: T. Agarwal INDIA

Co Author(s): P. Bandivadekar   S. Kumar   N. Aron   N. Sharma   S. Khokhar        

Abstract Details

Purpose:

To study biometry in pediatric patients using IOL Master 500 and Lenstar 900 and evaluate refractive outcome following pediatric cataract surgery.

Setting:

Dr. R.P. Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India

Methods:

In this prospective study, 67 eyes of 38 pediatric patients between 4-9 years of age, with non-traumatic cataract underwent non-contact biometry evaluation using IOL Master 500 and Lenstar 900. Axial length (AL) was also measured using applanation ultrasonography (A Scan) and keratometry (K) with automated keratometer. Intraocular lens (IOL) power was calculated using the A Scan and K values. Lens aspiration and IOL implantation with or without capsulorhexis was performed. Refractive error at 6 weeks was noted. Post hoc analysis for predictive error using four IOL power calculation formulae was performed.

Results:

Mean age of patients was 5.9 ± 2.2 years. AL was captured in 46.27% and 31.34% using IOL Master and Lenstar respectively (p=0.11). There was no difference in AL and K between either optical biometers or conventional method. Mean absolute error (MAE) was least for Holladay I (0.70±0.52 D). There was no difference (p>0.05) between the MAE using SRK II, SRK T, Holladay I and Hoffer Q on Lenstar and IOL Master. Holladay I performed better in subset of patients >6 years of age (p=0.001), with 94.4% eyes within 1D of predicted refractive error on IOL Master.

Conclusions:

Non-contact optical biometry can be used effectively in eyes with pediatric cataract. IOL Master 500 and Lenstar 900 provide comparable results.

Financial Disclosure:

None