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Accuracy of intraocular lens power calculation using three optical biometry measurement devices: the OA-2000, Lenstar-LS900 and IOLMaster-500

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Session Details

Session Title: Pseudophakic IOL Power Calculation: Photic Phenomena after IOL Implantation

Session Date/Time: Sunday 08/10/2017 | 16:30-18:00

Paper Time: 17:06

Venue: Room 3.4

First Author: : O.Reitblat ISRAEL

Co Author(s): :    A. Levy   G. Kleinmann   E. Assia              

Abstract Details

Purpose:

To compare ocular measurements and their application in intraocular lens (IOL) power calculation using the new optical biometry device, the OA­2000, with two widely used biometry systems, IOLMaster-500 and Lenstar-LS900.

Setting:

Ein Tal Eye Center, Tel Aviv, Israel

Methods:

Consecutive cases of eyes which had undergone cataract extraction surgery with preoperative optical biometry with OA­2000, IOLMaster-500 and Lenstar-LS900 were enrolled. Biometry measurements and IOL power calculations using the three devices were compared. The deviation of the postoperative refraction from the preoperative refractive target was calculated with different formulas (Barrett universal II, Hoffer Q, Holladay I and SRK/T) for the chosen IOL. Errors in the predicted astigmatism using the Barrett toric calculator were calculated for the implanted toric IOL power and axis.

Results:

High agreement was found between the OA-2000, IOLMaster and lenstar devices for AL, ACD, average K, WTW and LT measurements (inter class correlation confidents: 1.000, 0.964, 0.998, 0.964 and 0.973, respectively, P<0.001), although statistically significant differences were detected. The mean absolute errors were similar using all formulas, ranging from 0.23D to 0.27D, with no statistical significant difference between the three devices per each formula. There was an ATR centroid error in the predicted astigmatism using all three devices with the Barrett toric of: 0.04D±0.53@20.3° (OA-2000), 0.16D±0.49@18.5° (IOLMaster) and 0.15D±0.45@27.1° (Lenstar).

Conclusions:

The OA-2000 biometry measurements show good agreement with those of the IOLMaster and Lenstar. Although minor statistically significant differences in the measurements were found, our results suggest no influence on clinical outcomes using the three devices.

Financial Disclosure:

NONE

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