The horopter is defined by the criterion with which it is measured; these include the apparent frontoparallel plane, the region of binocular single vision, and identical visual direction. Another criterion is one that “the positions of the points are such that none provides a stimulus for fusional movement of the eyes”. Measuring the horopter using this criterion is the aim of the current paper. Based on previous research investigating corresponding points, we predicted the vergence horopter should trace an arc similar to the empirical horizontal horopter. We further predicted based on the characteristics of vergence eye movements in the periphery, that the range of horizontal disparities that do not elicit a vergence movement would increase with eccentricity. In experiment 1 we conducted the first measurements of the vergence horopter along the horizontal plane of regard and sagittal planes. We found that the vergence horopter consists of a stable range of disparities that do not increase with eccentricity. In experiment 2, we measured Panum’s fusional range for the same eccentricities and elevations to determine the placement of the vergence horopter within the fusional ranges. In the horizontal plane, the vergence horopter sits centrally within Panum’s fusional range. In the vertical plane, the data are suggestive that the vergence horopter is less slanted than the corresponding fusional range.

horopter 由测量它的标准定义；这些包括明显的正面平行平面、双眼单视区域和相同的视觉方向。另一个标准是“点的位置使得没有一个为眼睛的融合运动提供刺激”。使用此标准测量 horopter 是当前论文的目标。根据之前对对应点的研究，我们预测辐散水平仪应该跟踪类似于经验水平水平仪的弧线。我们进一步根据外围辐辏眼球运动的特征预测，不引起辐辏运动的水平视差范围会随着偏心率而增加。在实验 1 中，我们首次测量了沿水平面和矢状面的辐散度视距仪。我们发现辐散度视差由不随偏心率增加的稳定范围组成。在实验 2 中，我们测量了相同偏心率和仰角的 Panum 融合范围，以确定聚散水平仪在融合范围内的位置。在水平面上，辐辏水平仪位于 Panum 融合范围的中心。在垂直平面上，数据表明会聚水平视距仪的倾斜程度低于相应的融合范围。我们测量了相同偏心率和仰角的 Panum 融合范围，以确定聚散度视距仪在融合范围内的位置。在水平面上，辐辏水平仪位于 Panum 融合范围的中心。在垂直平面上，数据表明会聚水平视距仪的倾斜程度低于相应的融合范围。我们测量了相同偏心率和仰角的 Panum 融合范围，以确定聚散度视距仪在融合范围内的位置。在水平面上，辐辏水平仪位于 Panum 融合范围的中心。在垂直平面上，数据表明会聚水平视距仪的倾斜程度低于相应的融合范围。