Rutstein R P, Eskridge J B
Am J Optom Physiol Opt. 1986 Aug;63(8):639-44. doi: 10.1097/00006324-198608000-00007.
We studied vertical fixation disparity (VFD) with the purpose of assisting the clinician in the evaluation of patients having vertical heterophoria and/or vertical anisometropia and in the prescription of an appropriate vertical prismatic correction. Our research shows that VFD represents a relatively stable and reliable measurement of the vertical deviation; provides the clinician with a mechanism to study a patient's ability to adapt to an induced vertical fusional demand; and provides a process to determine the amount of the vertical prismatic correction.
我们研究了垂直注视差异（VFD），目的是协助临床医生评估患有垂直隐斜和/或垂直屈光参差的患者，并开具适当的垂直棱镜矫正处方。我们的研究表明，VFD是垂直偏差的一种相对稳定且可靠的测量方法；为临床医生提供了一种机制，用以研究患者适应诱导性垂直融合需求的能力；并提供了一个确定垂直棱镜矫正量的过程。
