TY - JOUR T1 - Validity and repeatability of the Aladdin ocular biometer JF - British Journal of Ophthalmology JO - Br J Ophthalmol SP - 256 LP - 258 DO - 10.1136/bjophthalmol-2013-304002 VL - 98 IS - 2 AU - Priyanka Mandal AU - Emma J Berrow AU - Shehzad A Naroo AU - James S Wolffsohn AU - Detlef Uthoff AU - Detlef Holland AU - Sunil Shah Y1 - 2014/02/01 UR - http://bjo.bmj.com/content/98/2/256.abstract N2 - Aim To assess the accuracy and reproducibility of biometry undertaken with the Aladdin (Topcon, Tokyo, Japan) in comparison with the current gold standard device, the IOLMaster 500 (Zeiss, Jena, Germany). Setting University Eye Clinic, Birmingham, UK and Refractive Surgery Centre, Kiel, Germany. Methods The right eye of 75 patients with cataracts and 22 healthy participants were assessed using the two devices. Measurements of axial length (AL), anterior chamber depth (ACD) and keratometry (K) were undertaken with the Aladdin and IOLMaster 500 in random order by an experienced practitioner. A second practitioner then obtained measurements for each participant using the Aladdin biometer in order to assess interobserver variability. Results No statistically significant differences (p>0.05) between the two biometers were found for average difference (AL)±95% CI=0.01±0.06 mm), ACD (0.00±0.11 mm) or mean K values (0.08±0.51 D). Furthermore, interobserver variability was very good for each parameter (weighted κ≥0.85). One patient's IOL powers could not be calculated with either biometer measurements, whereas a further three could not be analysed by the IOLMaster 500. The IOL power calculated from the valid measurements was not statistically significantly different between the biometers (p=0.842), with 91% of predictions within±0.25 D. Conclusions The Aladdin is a quick, easy-to-use biometer that produces valid and reproducible results that are comparable with those obtained with the IOLMaster 500. ER -