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Comparison of Two Optical Biometry Systems on Intraocular Lens Power Calculation

Poster Details

First Author: W.Ghobashy EGYPT

Co Author(s):    A. A. Latif   M. A. Latif           

Abstract Details

Purpose:

To study the refractive outcome of cataract surgery, comparing both IOLMaster and Lenstar LS 900 biometry data in a prospective study of 140 eyes that underwent phacoemulsification with intraocular lens implantation.

Setting:

Egyptian Eye Academy, Cairo, Egypt, AlGawhara Eye Center, Ismailia, Egypt

Methods:

One Hundred and forty eyes had uneventful cataract surgery with in the bag implantation of single piece hydrophobic IOL. Preoperatively, eyes were randomly assigned into one of two groups; Group I: with calculation of the desired IOL power using IOL master. Group II with calculation made using Lenstar LS 900. Holladay II formula was adopted for prediction of implanted IOL in both groups after optimization of the surgeon factor. After one month, the refractive outcome was determined by retinoscopy for all patients.

Results:

The study included 140 eyes of 80 patients with mean age of 74.32 ± 8.32 years underwent uneventful phacoemulsification with hydrophobic single piece IOL implantation. The mean postoperative spherical equivalent was -0.53 D for group I and 0.09 for group II. 77.88% of eyes in group II reached within -/+ one diopter of target refraction in comparison to 91.2% of eyes in group I. The mean absolute prediction error was 0.14 and 0.21 for group I and group II respectively. Miscalculation beyond two diopters were reported in four eyes (6%) in patients of group II.

Conclusions:

Both IOL Master and Lenstar LS 900 optical biometry show satisfactory and repeatable accurate results of IOL calculation. However, IOL Master gave almost no miscalculation outside one diopter of intended refraction compared to few with Lenstar LS 900; giving IOL Master advantage with Holladay II formula adopted in this work.

Financial Disclosure:

NONE

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