Evaluation of the Lenstar LS 900 non-contact biometer
Evaluation of the Lenstar LS 900 non-contact biometer
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DOI：
10.1136/bjo.2009.161729
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发表时间：
2010-01-01
影响因子：
4.1
通讯作者：
Nuijts, R. M. M. A.
中科院分区：
文献类型：
--
作者：
Cruysberg, L. P. J.;Doors, M.;Nuijts, R. M. M. A.
背景/目的：评价Lenstar LS 900非接触式生物测量仪的再现性，并与Visante前节光学相干断层扫描（AS-OCT）和IOLMaster进行比较。方法：中央角膜厚度（CCT）、前房深度（ACD）、透镜厚度（LT）、角膜曲率（K）值，测量38名健康志愿者（76只眼）的角膜直径（CD）和眼轴长度（AL），以确定Lenstar的可重复性。将使用Lenstar测量的CCT、ACD、CD、K值和AL测量值与AS-OCT和IOLMaster进行比较。结果：Lenstar对CCT、ACD、LT、K值和AL测量的重复性优于0.9%。尽管所有相关性均高度显著（p < 0.001），但除使用Lenstar和IOLMaster的CD测量值比较（p = 0.175）外，所有比较均显示出显著差异。对于20、25和30 mm的AL，Lenstar和IOLMaster AL测量值之间的平均差异为0.03 mm，IOL屈光度计算值的差异分别为0.13 D、0.10 D和0.08 D。Lenstar、Visante OCT和IOLMaster之间存在微小但显著的差异。因此，Lenstar、AS-OCT和IOLMaster的测量值不可互换。尽管AL测量值之间存在显著差异，但IOL屈光度计算结果无临床显著差异。
Background/aims: Evaluation of the reproducibility of the Lenstar LS 900 non-contact biometer, and a comparison with the Visante anterior-segment optical coherence tomography (AS-OCT) and the IOLMaster.Methods: Central corneal thickness (CCT), anterior chamber depth (ACD), lens thickness (LT), keratometry (K) values, corneal diameter (CD) and axial length (AL) were obtained in 38 healthy volunteers (76 eyes) to determine the reproducibility of the Lenstar. CCT, ACD, CD, K values and AL measurements measured with the Lenstar were compared with the AS-OCT and IOLMaster. Intraocular lens (IOL) power calculations were 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 highly significant (p < 0.001), all comparisons showed a significant difference, except for 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 mm with 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 the Lenstar, 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 IOL power calculation results.