Abstract Cruysberg LP et al.

Evaluation of the Lenstar LS 900 non-contact biometer.

Cruysberg LP, Doors M, Verbakel F, Berendschot TT, De Brabander J, Nuijts RM.
Br J Ophthalmol. 2010 Jan;94(1):106-10. Epub 2009 Aug 18.

BACKGROUND/AIMS:
Evaluation of the reproducibility of the Lenstar LS 900non-contact biometer, and a comparison with the Visante anterior-segment optical coherence tomography (AS-OCT) and the IOLMaster.

METHODS:
Central cornealthickness (CCT), anterior chamber depth (ACD), lens thickness (LT), keratometry(K) values, corneal diameter (CD) and axial length (AL) were obtained in 38healthy volunteers (76 eyes) to determine the reproducibility of the Lenstar.CCT, ACD, CD, K values and AL measurements measured with the Lenstar werecompared with the AS-OCT and IOLMaster. Intraocular lens (IOL) power calculationswere done to study the significance of the difference between AL measurements. 

RESULTS:
The reproducibility of the Lenstar was better than 0.9% for CCT, ACD,LT, K values and AL measurements. Although all correlations were highlysignificant (p<0.001), all comparisons showed a significant difference, exceptfor the comparison of CD measurements using the Lenstar and IOLMaster (p =0.175). The differences in IOL power calculations for an AL of 20, 25 and 30 mmwith a mean difference between Lenstar and IOLMaster AL measurements of 0.03 mm, were 0.13 D, 0.10 D and 0.08 D, respectively.

CONCLUSION:
The reproducibility of the Lenstar was excellent. Small but significant differences exist between theLenstar, Visante OCT and the IOLMaster. Therefore, measurements of the Lenstar,AS-OCT and IOLMaster are not interchangeable. Despite the significant difference between AL measurements, there is no clinically significant difference in the IOLpower calculation results.