Posters

Comparison of ocular biometry and prediction of postoperative refractive outcomes using IOLMaster and A-scan in severe cataract

Poster Details

First Author: H.Oh SOUTH KOREA

Co Author(s):    S. Kim   Y. Chung                 

Abstract Details

Purpose:

To compare the ocular biometry and prediction of postoperative refractive outcomes using IOL master 700 and A-scan in severe cataract under visual acuity of 1.7 logMAR.

Setting:

Department of Ophthalmology, Uijeongbu St. Mary’s Hospital, College of Medicine, The Catholic University of Korea.

Methods:

Thirty-seven eyes in thirty-five patients with severe cataract under visual acuity of 1.7 logMAR were scheduled for cataract surgery. Axial length and anterior chamber depth were measured preoperatively with IOL master 700 and A-scan. The SRK-T formula was employed to determine the power of the intraocular lens and postoperative refractive error was obtained with the difference between preoperative predictive refraction and postoperative refraction outcome using autorefraction.

Results:

The absolute predictive refraction error was 0.96±1.02 diopter in IOL master 700 and 0.92±0.92 diopter in A-scan, and the difference was not significant.(p=0.82) The mean axial lengths was 23.66±1.24 mm from IOL Master 700, significantly longer than 23.51±1.17 mm from A-scan(p<0.01) and the IOL master 700 measures 0.16±0.11 mm longer than A-scan. The mean anterior chamber depth was 3.28±0.41 mm, 2.56±0.27 mm for IOL master and A-scan, respectively, with statistically significant difference.(p<0.01). The nonparametric Wilcoxon’s signed rank test was used in comparing the mean results from the two methods.

Conclusions:

There was no significant difference between IOL master 700 and A-scan in prediction of refractive outcomes after surgery of severe cataract under visual acuity of 1.7 logMAR. However, IOL master 700 measured axial length and anterior chamber depth longer than A-scan. If available, IOL master 700 can be considered as reliable method for ocular biometry and prediction of postoperative refractive outcomes in cases of severe cataract.

Financial Disclosure:

None