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Comparison of two different optical biometers with conventional methods in calculating lens power in paediatric cataract patients

Poster Details

First Author: T.Agarwal INDIA

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

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:

Tertiary Eye Hospital (With Subspeciality Clinics)

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:

The mean age of patients was 5.9 ± 2.2 years. AL could be captured in 46.27% and 31.34% using IOL Master and Lenstar respectively (p=0.11). There was no statistically significant 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 statistically significant 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 patients >6 years of age (p=0.001), with 94.4% eyes within 1D of predicted refractive error.

Conclusions:

Non-contact optical biometry can be used effectively in eyes with pediatric cataract. IOL Master and Lenstar provide comparable results. FINANCIAL DISCLOUSRE: NONE

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