Posters

Comparison of the refractive predictability measured by ultrasound biometry and partial coherence interferometers in combined phacovitrectomy

Poster Details

First Author: H. Kim KOREA, SOUTH

Co Author(s):    S. Lim   B. Cho   J. Park              

Abstract Details

Purpose:

To compare the accuracy of refractive predictability measured by ultrasound biometry and partial coherence interferometers in combined phacovitrectomy.

Setting:

Gyeongju St. Mary's Eye Center, South Korea

Methods:

We performed a retrospective study in 74 eyes of 74 patients who underwent phacovitrectomy. SRK-T formula was used to predict intraocular lens (IOL) power. Three months after phacovitrectomy, the difference between the predicted and postoperative refractive outcomes for the 2 methodologies (ultrasound biometry and partial coherence interferometers) were compared. The predicted refractive outcome was defined as the estimated refractive error when the selected IOL was inserted.

Results:

The axial length measured using IOL Master 500® was statistically longer than when measured using ultrasound biometry (23.85±0.15mm, 23.56±0.15mm, p<0.001). Based on keratometry, statistically significant difference between the 2 groups was not observed. The postoperative refractive error was more accurate when using the IOL Master 500® than ultrasound biometry (0.08±0.74, 0.47±0.69, p<0.001). However, in cases of vitreous hemorrhage, the postoperative refractive error was 0.42±0.49 with the IOL Master 500® and 0.07±0.54 with the ultrasound biometry.

Conclusions:

Generally, IOL Master 500® is a more accurate method for calculating the IOL power prior to phacovitrectomy. However, in cases of vitreous hemorrhage, ultrasound biometry appears superior to IOL Master 500® when calculating the IOL power.

Financial Disclosure:

NONE