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LENSTAR versus immersion A-scan biometry: comparing predicted target refractive outcome to postoperative refraction in cataract surgery with intraocular lens implantation

Poster Details

First Author: A.Wan Ab Kadir MALAYSIA

Co Author(s):    S. Sundralingam   M. Peyman   V. Subrayan        

Abstract Details



Purpose:

To determine the accuracy of Intraocular lens (IOL) calculations performed and compared using Optical Low – Coherence Reflectometry (OLCR) (Lenstar LS900) and immersion A-scan biometry.

Setting:

University Malaya Medical Centre, Kuala Lumpur, Malaysia

Methods:

A prospective study was done where data from preoperative and 2 months postoperative refraction of recruited patients was analyzed for adult eyes that had underwent phacoemulsification with intraocular lens implantation into the capsular bag. This study had Lenstar and immersion A-scan biometry techniques performed to each eye that is planned for operation, and was compared.

Results:

The mean age at surgery of the 200 patients (200 eyes) was 66.86 + 6.95 years, with 87(43.5%) males and 113(56.5%) females. The paired t-test result showed no significant difference between the target value given by Lenstar (p-value = 0.632) or USG (P-value = 0.438) devices and the spherical equivalent value. Independent t-test shows that these magnitudes of difference between the 2 biometric devices are the same (p-value = 0.868). Results also showed that majority of the predicted errors and the absolute predicted errors based on the measurements using Lenstar and Immersion USG biometry fell in the range of + 0.5D from the center of 0.0D

Conclusions:

The result of this study shows the immersion ultrasound biometry is reliable and can be recommended for patients undergoing cataract IOL power calculation to provide the required target post-operative outcome.

Financial Disclosure:

NONE

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