Paediatric's Ophthalmology Department, Ophthalmology Clinic Vista Sánchez Trancón, Badajoz, Spain.
Centre of Physics, University of Minho, Braga, Portugal.
Clin Exp Optom. 2023 Sep;106(7):783-792. doi: 10.1080/08164622.2022.2152312. Epub 2022 Dec 12.
Biometric measurements in the context of myopia are fundamental to detect eyes at risk of developing myopia and during the follow-up of patients with myopia control treatment. Thus, the accuracy of biometers has high clinical relevance.
The Myopia Master is a new biometer based on partial coherence interferometry especially dedicated to the follow-up of myopic patients. This study aims to assess the repeatability of the Myopia Master and evaluate its agreement with a swept-source optical coherence interferometry biometer (IOL Master 700).
This cross-sectional prospective study assessed the biometric parameters of two groups of myopes (age range: 8-16 years old), spectacle corrected (n = 60) and orthokeratology contact lens wearers (n = 60). One senior optometrist performed two consecutive measurements per instrument, which included axial length, mean keratometry and horizontal visible iris diameter (HVID). The repeatability of each device and the agreement between devices were assessed by the dispersion of the measurement differences, for AL, mean keratometry, corneal astigmatism and HVID.
The two biometers measured approximately the same value in both measurements. Test-retest repeatability tended to be lower than clinical significant thresholds, in particular, for AL and mean keratometry. Corneal-related parameters tended to have lower repeatability in the orthokeratology group, especially mean keratometry. The agreement between instruments revealed statistically significant differences between devices with the SS-OCT measuring longer eyes, steeper corneas and larger HVID.
In a paediatric population, the Myopia Master showed clinically acceptable repeatability levels, but the IOL Master 700 demonstrated superior repeatability. Eyes treated with orthokeratology may compromise the repeatability of the corneal-related parameters. The Myopia Master and the IOL Master 700 are repeatable devices appropriate for monitoring myopia progression, but the differences observed do not allow their use interchangeably.
近视相关的生物测量对于发现有发展成近视风险的眼睛以及在近视控制治疗的患者随访中至关重要。因此，生物测量仪的准确性具有重要的临床意义。
Myopia Master 是一种新型的基于部分相干干涉测量技术的生物测量仪，专门用于近视患者的随访。本研究旨在评估 Myopia Master 的重复性，并评估其与扫频源光相干干涉生物测量仪（IOL Master 700）的一致性。
这是一项横断面前瞻性研究，评估了两组近视患者（年龄范围：8-16 岁）的生物测量参数，分别为框架眼镜矫正（n=60）和角膜塑形镜佩戴者（n=60）。一位资深验光师对每台仪器进行两次连续测量，包括眼轴长度、平均角膜曲率和水平可见虹膜直径（HVID）。通过测量差异的离散度评估每个设备的重复性和设备之间的一致性，用于 AL、平均角膜曲率、角膜散光和 HVID。
两台生物测量仪在两次测量中测量的数值大致相同。测试-重测重复性倾向于低于临床显著阈值，特别是在 AL 和平均角膜曲率方面。角膜相关参数在角膜塑形镜组中的重复性较低，尤其是平均角膜曲率。仪器之间的一致性显示，SS-OCT 测量的眼轴更长、角膜更陡、HVID 更大，这两种仪器之间存在统计学上的显著差异。
在儿童人群中，Myopia Master 显示出可接受的临床重复性水平，但 IOL Master 700 显示出更高的重复性。接受角膜塑形术治疗的眼睛可能会影响角膜相关参数的重复性。Myopia Master 和 IOL Master 700 是可重复使用的设备，适用于监测近视进展，但观察到的差异不允许它们互换使用。
