Nawrot Mark
Department of Psychology, North Dakota State University, Fargo, North Dakota, USA.
J Vis. 2003 Dec 18;3(11):841-51. doi: 10.1167/3.11.17.
Recent findings suggest that the slow eye movement system, the optokinetic response (OKR) in particular, provides the extra-retinal signal required for the perception of depth from motion parallax (Nawrot, 2003). Considering that both the perception of depth from motion parallax (Ono, Rivest & Ono, 1986; Rivest, Ono & Saida, 1989) and the eye movements made in response to head translations (Schwarz & Miles 1991; Paige, Telford, Seidmen, & Barnes, 1998) appear to scale with viewing distance, changes in perceived depth from motion parallax were studied as a function of viewing distance. If OKR is used in the perception of depth from motion parallax, a change in the OKR signal, caused by a change in viewing distance, should accompany a change in perceived depth from motion parallax. Over a range of viewing distances, binocular stereopsis was used to index perceived depth from motion parallax. At these viewing distances the gain of the OKR portion of the compensatory eye movement was also determined. The results show that the change in OKR gain is mirrored by the change in perceived depth from motion parallax as viewing distance increases. This suggests that the OKR eye movement signal serves an important function in the perception of depth from motion.
最近的研究结果表明，慢眼动系统，尤其是视动反应（OKR），提供了从运动视差感知深度所需的视网膜外信号（纳罗特，2003年）。鉴于从运动视差感知深度（小野、里维斯特和小野，1986年；里维斯特、小野和斋田，1989年）以及响应头部平移而产生的眼动（施瓦茨和迈尔斯，1991年；佩奇、特尔福德、西德门和巴恩斯，1998年）似乎都与观察距离成比例，因此研究了从运动视差感知深度的变化作为观察距离的函数。如果OKR用于从运动视差感知深度，那么由观察距离变化引起的OKR信号变化应该伴随着从运动视差感知深度的变化。在一系列观察距离上，使用双眼立体视觉来索引从运动视差感知的深度。在这些观察距离下，还确定了补偿性眼动中OKR部分的增益。结果表明，随着观察距离的增加，OKR增益的变化与从运动视差感知深度的变化相对应。这表明OKR眼动信号在从运动感知深度中起着重要作用。
