Liu L, Tyler C W, Schor C M
University of California, School of Optometry, Berkeley 94720.
Vision Res. 1992 Aug;32(8):1471-9. doi: 10.1016/0042-6989(92)90203-u.
Presentation of different images to the two eyes normally results in a time-varying alternation between the two images (binocular rivalry). However, we find that when orthogonal gratings are viewed dichoptically at low contrast, a stable summation between the two images is perceived in the form of a dichoptic plaid. The range of perception of the dichoptic plaid depends on spatial frequency, contrast and luminance of the gratings. This phenomenon differs from the "false fusion", a fleeting summation of different images perceived only under very brief presentation of the stimuli. The observations suggest that there exists a neural process that performs a summation of dissimilar images, and that is distinct from the competitive process of suppression and binocular rivalry.
通常情况下，向双眼呈现不同图像会导致这两个图像之间出现随时间变化的交替（双眼竞争）。然而，我们发现，当以低对比度双眼分别观看正交光栅时，会以双眼视差格子图案的形式感知到两个图像之间稳定的叠加。双眼视差格子图案的感知范围取决于光栅的空间频率、对比度和亮度。这种现象不同于“错误融合”，“错误融合”是指仅在刺激的非常短暂呈现下才会感知到的不同图像的短暂叠加。这些观察结果表明，存在一种对不同图像进行叠加的神经过程，并且该过程不同于抑制和双眼竞争的竞争过程。
