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A comparison between surgically induced astigmatism measured by different devices

Poster Details

First Author: S.Ofir ISRAEL

Co Author(s):    A. Abulafia   A. Levi   O. Reitblat   A. Michaeli   G. Kleinmann   E. Assia

Abstract Details



Purpose:

To compare surgically induced astigmatism (SIA) measured by dual-zone automated keratometry (Lenstar LS900), automated keratometry (IOL-Master 500) and corneal topography (ATLAS) using vector analysis

Setting:

Ein-Tal Eye Center, Tel Aviv, Israel

Methods:

A retrospective, comparative case series of patient records who underwent an intraocular lens (IOL) implantation and had preoperative and more than 1 month postoperative corneal Keratometry measurements using the Lenstar LS 900, IOL Master 500 and the ATLAS corneal topographer devices. Vector analysis was used to calculate the SIA. Mean SIA and standard deviations (SD) obtained by the different devices were than compared

Results:

Data for 70 eyes was available for analysis. Mean SIA was 0.50ḟ0.28D (Lenstar), 0.52ḟ0.38D (IOL Master), 0.56ḟ0.39D (ATLAS Sim K’s) and 0.66ḟ0.46D (ATLAS Mean K’s). A statistically significant difference of the mean SIA was noticed between the Lenstar and the IOL-Master in comparison with the ATLAS Mean K’s (P=0.005, 0.025 respectively)

Conclusions:

Mean SIA found to be similar using the Lenstar, IOL-Master and the ATLAS topographers Sim K’s. Dual-zone automated keratometry showed the smallest standard deviation

Financial Disclosure:

NONE

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