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Interference biometry through hard cataracts with the Aladdin optical biometer

Poster Details

First Author: J.Mendoza PERU

Co Author(s):    A. Orozco   L. Izquierdo                 

Abstract Details

Purpose:

To compare measurements obtained by three different biometers through dense cataracts and to test the repetibility of this instruments.

Setting:

Instituto de Ojos Oftalmosalud,Lima,Perú

Methods:

45 eyes. 20 Male, 25 Female. Age range 52 - 91. (71.6 SD 10.38). 23 right eyes, 22 left eyes. The cataracts were ranging from NO3 NC3, C3, P3 and up. (LOCS III). Every patient acquired 3 times by the same trained operator. All measurements obtained were calculated following the British Standard Institution, 1979.We measured and compared 3 Different Biometers for axial length (AL), anterior chamber depth (ACD) and also one corneal topographer for keratometry (K) readings: IOL Master V 5.4 (Carl Zeiss Meditec). IOL Master 500 (Carl Zeiss Meditec). Aladdin (Topcon Medical Systems) and Pentacam (Oculus Optikgeräte GmbH).

Results:

IOL Master V 5.4 couldn't measure AL in 37.7%, IOL Master 500 in 11.1% and Aladdin in 6.6%. IOL Master V 5.4 could measure ACD in 66.6%. IOL Master 500 in 100%. and Aladdin in 100%. IOL Master V 5.4 could measure K readings in 66.6%. IOL Master 500 in 100%. Aladdin in 100%. IOL Master V 5.4 could measure axis of steepest meridian in 66.6%. IOL Master 500 measure axis in 100%. Aladdin measure axis of steepest meridian in 100%. Comparison results showed a P value of <0.01 for Aladdin AL measure and IOL Master 500, <0.01 for Aladdin AL measure and IOL Master V 5.4 and <0.01 for K readings versus Pentacam and IOL Master 500.

Conclusions:

Aladdin Performs as good as the IOL Master 500 in AL measurements and better than IOL Master V 5.4. (no statistical significance). Aladdin performs as Good as IOL Master 500 and Pentacam in measuring K readings (no statistical Significance). All 3 biometer machines perform different in obtaining the axis for the corneal steepest meridian. Further Studies are needed as this new technology advance to get a new gold standard in Biometry through dense cataracts. We continue working and collecting data of more patients to get better statistical analysis.

Financial Disclosure:

One or more of the authors receives consulting fees, retainer, or contract payments from a company producing, developing or supplying the product or procedure presented, One or more of the authors travel has been funded, fully or partially, by a company producing, developing or supplying the product or procedure presented

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