Hoffmann Joachim, Sebald Albrecht
Department of Psychology, University of Würzburg, Röntgenring 11, D 97070 Würzburg, Germany.
Perception. 2007;36(3):461-70. doi: 10.1068/p5549.
When an observer looks at a hollow mask of a face, a normal convex face is often perceived [the hollow-face illusion--Gregory 1973, in Illusion in Nature and Art (London: Duckworth) pp 49-96]. We show that in exploring an illusory face, the eyes converge at the illusory and not at the real distances of fixated targets like the tip of the nose. The 'vergence error' appears even though the resulting disparities of the two retinal images of the target provide feedback that would allow an immediate correction. It is presumably the success of recognising a familiar object (a face) which overrides the correction of convergence. This suggests that the brain strives for a congruency of eye vergence and distance perception.
当观察者注视一张脸部的中空面具时，常常会感知到一张正常的凸脸[中空脸错觉——格雷戈里，1973年，载于《自然与艺术中的错觉》（伦敦：达克沃思出版社），第49 - 96页]。我们发现，在探索一张错觉脸时，眼睛会在错觉距离处汇聚，而不是在像鼻尖这样的注视目标的实际距离处汇聚。即使目标的两个视网膜图像所产生的视差提供了能够立即进行校正的反馈，“汇聚误差”仍然会出现。大概是识别出熟悉物体（一张脸）的成功压倒了对视轴汇聚的校正。这表明大脑力求使眼睛的视轴汇聚与距离感知相一致。
