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Comparison of Aladdin and IOLMaster ocular biometers in patients undergoing cataract surgery

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Session Details

Session Title: Cataract Surgery Equipment. Cataract Surgery Outcomes

Session Date/Time: Monday 07/09/2015 | 16:30-18:30

Paper Time: 16:30

Venue: Main Auditorium

First Author: : I.Barequet ISRAEL

Co Author(s): :    N. Sorkin   A. Rosenblatt                 

Abstract Details


To compare measurements of axial length (AL), anterior chamber depth (ACD), keratometry (K), and the refractive predictability of the Aladdin and IOLMaster biometry devices in cataract surgery patients.


Cataract clinic affiliated with the Goldschleger Eye Institute, Sheba Medical Center, Israel.


A retrospective observational study of 206 eyes undergoing cataract surgery. Data were retrieved on AL, ACD, and K measurements obtained by 2 biometers: IOLMaster (Carl Zeiss Meditec, Berlin, Germany) and Aladdin (Topcon, Tokyo, Japan). Postoperative refractive prediction errors were calculated for each device and compared.


AL measurement was 24.14±1.74mm with Aladdin and 24.13±1.74mm with IOLMaster (p=0.288). K measurement was 43.83±1.53D with Aladdin and 43.94±1.57D with IOLMaster (p<0.001). There was an excellent correlation of AL and K measurements (r2=0.9994 and r2=0.9830, respectively) between the devices. Eighty six of 206 eyes underwent cataract surgery with a monodical intraocular lens, and the prediction of postoperative refraction showed a mean absolute error (MAE) of 0.51±0.39D with IOLMaster and 0.56±0.40D with Aladdin (p=0.001). Following adjustment of Aladdin measurements for the systematic difference found in K measurement, the difference in MAE was no longer significant (p=0.526). ACD measurements did not differ significantly (p=0.277). ACD measurement success was significantly higher with the Aladdin (p<0.001).


A very good correlation was found in AL, K and ACD measurements between the Aladdin biometer and the IOLMaster. Minimal adjustment of Aladdin K measurements matches the IOLMaster refractive predictability.

Financial Interest:


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