Validity and repeatability of the Aladdin ocular biometer

Priyanka Mandal, Emma J. Berrow, Shehzad A. Naroo, James S. Wolffsohn, Detlef Uthoff, Detlef Holland, Sunil Shah

Research output: Contribution to journalArticle

Abstract

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.

LanguageEnglish
Pages256-258
Number of pages3
JournalBritish Journal of Ophthalmology
Volume98
Issue number2
Early online date13 Nov 2013
DOIs
Publication statusPublished - 31 Dec 2014

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Observer Variation
Anterior Chamber
Germany
Biometry
Refractive Surgical Procedures
Equipment and Supplies
Tokyo
Cataract
Healthy Volunteers
Japan

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Mandal, Priyanka ; Berrow, Emma J. ; Naroo, Shehzad A. ; Wolffsohn, James S. ; Uthoff, Detlef ; Holland, Detlef ; Shah, Sunil. / Validity and repeatability of the Aladdin ocular biometer. In: British Journal of Ophthalmology. 2014 ; Vol. 98, No. 2. pp. 256-258.
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abstract = "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.",
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Validity and repeatability of the Aladdin ocular biometer. / Mandal, Priyanka; Berrow, Emma J.; Naroo, Shehzad A.; Wolffsohn, James S.; Uthoff, Detlef; Holland, Detlef; Shah, Sunil.

In: British Journal of Ophthalmology, Vol. 98, No. 2, 31.12.2014, p. 256-258.

Research output: Contribution to journalArticle

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AU - Naroo, Shehzad A.

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AU - Holland, Detlef

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