Spatial distortions produced by purely dichoptic-based visual motion.
It is known that local, monocular motion (short-range motion) can produce local distortions of visual space. We wanted to know if local monocular motion was both sufficient and necessary for producing motion-based spatial distortions. We used a previously reported dichoptic motion stimulus in which the directional motion signal is not present in either eye's input but is only present after binocular combination. We show that such a stimulus can also induce perceived changes in spatial position. This suggests that local, monocular motion while being sufficient is not necessary for the production of motion-based illusions. It suggests that one source of motion signals responsible for this illusion is from binocular motion mechanisms.
Hess
Robert F
RF
McGill Vision Research, Department of Ophthalmology, McGill University, 687 Pine Avenue West, Montreal, Québec H3A 1A1, Canada. robert.hess@mcgill.ca
Huang
Pi-Chun
PC
Maehara
Goro
G
D003627:Data Interpretation, Statistical; D005133:Eye Movements / Q000502:physiology; D006801:Humans; D008962:Models, Theoretical; D009039:Motion Perception / Q000502:physiology*; D010775:Photic Stimulation / Q000379:methods*; D013028:Space Perception / Q000502:physiology; D015348:Vision, Binocular / Q000502:physiology*; D015349:Vision, Monocular / Q000502:physiology