Clinical and Experimental Eye Research Group, Faculty of Optics and Optometry, Universidad Complutense de Madrid, Madrid, Spain.
Department of Optometry and Vision, Faculty of Optics and Optometry, Universidad Complutense de Madrid, Madrid, Spain.
Sci Rep. 2024 Sep 27;14(1):22151. doi: 10.1038/s41598-024-73206-0.
The repeatability of two biometers (Lenstar-LS900 and Eyestar-900) to measure ocular parameters and intraocular lens (IOL) power calculation, and their agreement were evaluated. 134 eyes of 134 participants were measured thrice with each biometer. Axial length (AL), anterior chamber depth (ACD), lens thickness (LT) and keratometry (K) were evaluated. The IOL power was calculated using different formulas. The repeatability limit (RLimit), the mean differences (MD) and the limits of agreement (LoA) were calculated. The RLimits for all parameters were higher with Lenstar compared to Eyestar. RLimits were lower than 0.50 D except for Barrett Universal II (0.54 D) and Haigis (0.51 D) formulas with the Lenstar. Mean differences were lower than 0.01 mm for AL, ACD and LT, and lower than 0.03 D for K. MD ranged from 0 to 0.02 D for all formulas except for Barrett and Hill. When dividing the sample into subgroups (short, normal and long eyes), the MDs were similar for the IOL power and were lower than 0.03 D, except for the Barrett and Hill formulas. Both biometers provide repeatable biometry and IOL power calculations. The LoA interval for the IOL power calculation was between 0.75 and 1.50D, which was similar among the subgroups.
本研究旨在评估两款生物测量仪（Lenstar-LS900 和 Eyestar-900）在测量眼轴长度（AL）、前房深度（ACD）、晶状体厚度（LT）和角膜曲率（K）等眼部参数以及计算人工晶状体（IOL）屈光度方面的重复性和一致性。共有 134 名参与者的 134 只眼接受了这两种生物测量仪的三次测量。采用不同公式计算了 IOL 屈光度。计算了重复性限（RLimit）、平均差异（MD）和一致性界限（LoA）。与 Eyestar 相比，Lenstar 的所有参数的 RLimit 更高。除了 Barrett Universal II（0.54 D）和 Haigis（0.51 D）公式外，Lenstar 的 RLimit 均低于 0.50 D。AL、ACD 和 LT 的 MD 均低于 0.01mm，K 的 MD 均低于 0.03 D。除了 Barrett 和 Hill 公式外，所有公式的 MD 均低于 0.02 D。当将样本分为短眼、正常眼和长眼亚组时，IOL 屈光度的 MD 相似，均低于 0.03 D，除了 Barrett 和 Hill 公式。这两款生物测量仪均可提供重复性良好的生物测量和 IOL 屈光度计算结果。IOL 屈光度计算的 LoA 间隔在 0.75 至 1.50 D 之间，在亚组间相似。
