Abstract Holzer MP et al.

Accuracy of a new partial coherence interferometry analyser for biometricmeasurements.

Holzer MP, Mamusa M, Auffarth GU.
Br J Ophthalmol. 2009 Jun;93(6):807-10. Epub 2009 Mar 15.

AIMS:
Precise biometry is an essential preoperative measurement for refractivesurgery as well as cataract surgery. A new device based on partial coherenceinterferometry technology was tested and evaluated for accuracy of measurements.

METHODS:
In a prospective study 200 eyes of 100 healthy phakic volunteers wereexamined with a functional prototype of the new ALLEGRO BioGraph (WavelightAG)/LENSTAR LS 900 (Haag Streit AG) biometer and with the IOLMaster V.5 (CarlZeiss Meditec AG). As recommended by the manufacturers, repeated measurementswere performed with both devices and the results compared using Spearmancorrelation calculations (WinSTAT). 

RESULTS:
Spearman correlation showed highcorrelations for axial length and keratometry measurements between the twodevices tested. Anterior chamber depth, however, had a lower correlation between the two biometry devices. In addition, the mean values of the anterior chamberdepth differed (IOLMaster 3.48 (SD 0.42) mm versus BioGraph/LENSTAR 3.64 (SD0.26) mm); however, this difference was not statistically different (p>0.05, ttest).

CONCLUSION:
The new biometer provided results that correlated very wellwith those of the IOLMaster. The ALLEGRO BioGraph/LENSTAR LS 900 is a precisedevice containing additional features that will be helpful tools for any cataractor refractive surgeon.