近齿畸变评估技术的有效性

Jaime Bernal Escalante, M. Rosenfield, Elizabeth Casillas Casillas, Luis Fernando Barba Gallardo, Sergio Ramírez González
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摘要

背景:虽然以前的许多研究都对测量异相的技术的可重复性进行了调查,但对其有效性的研究却很少。因此,本研究考察了三种标准技术的能力:冯-格拉夫(VG)、马多克斯棒(MR)和改良索林顿(MT)测试,以量化已知的异视变化。方法:该研究对 30 名年轻受试者分别使用上述 3 种方法进行了测试。对近距离(40 厘米)异视力进行量化,包括不使用和使用额外的基底棱镜。有五个可能的值,即 2、4、6、8 和 9Δ。24 小时后,使用同样的技术,在屈光校正时添加其中一个棱镜,重复异视测量。结果:使用 VG 方法测量的引入棱镜前的平均异视力值明显高于使用其他两种方法测量的结果(p = 0.035)。在 VG 和 MT 方法中,引入棱镜后异视的测量值和预测值的变化没有明显差异,但在 MR 方法中发现了明显差异(p0.001)。结论:与 VG 和 MT 方法相比,MR 方法测量已知眼球运动偏差变化的能力明显较差。鉴于使用 VG 程序时棱镜前测量结果的平均值明显偏高,我们建议在临床环境中采用 MT 作为主观测量眼球运动偏差的首选技术。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Validity of Techniques to Evaluate Near Phoria
Background: While a number of previous studies have investigated the repeatability of techniques designed to measure heterophoria, there have been few studies of their validity. Accordingly, the present study examined the ability of 3 standard techniques; Von Graefe (VG), Maddox Rod (MR) and Modified Thorington (MT) tests to quantify a known change in heterophoria. Methods:The study was performed on 30 young subjects using each of the 3 procedures listed above. Near (40 cm) heterophoria was quantified both without and with an additional base-out prism. Five possible values were available, namely 2, 4, 6, 8 and 9Δ. After a period of 24 hours, the heterophoria measurement was repeated using the same technique with one of these prisms added to the refractive correction. Results:The mean heterophoria value measured before the introduction of prism using the VG procedure was significantly more exophoric than the findings obtained using the other 2 techniques (p = 0.035). No significant difference was observed between the measured and predicted change in heterophoria following the introduction of the prism for the VG and MT procedures, but a significant difference was found with the MR technique (p0.001). Conclusions:The ability to measure a known change in oculomotor deviation was significantly poorer with the MR technique, when compared with the VG and MT procedures. Given that the mean pre-prism measurement was significantly more exophoric when using the VG procedure, we recommend that MT be adopted as the technique of choice for the subjective measurement of oculomotor deviations in the clinical setting
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