The Rich Afterimage Illusions under Head-Image Tilting and the Internal Visual Space Model. A New Theoretical Comprehending | Chapter 10 | Current Aspects in Pharmaceutical Research and Development Vol. 1

 Some features of the illusions arising from the movement of the observer’s eyes and/or head under the background of the positive afterimage of the entire visual scene (rich afterimage-rAI) when the head and/or afterimage are tilted are described. There are impairments of visual direction constancy and stability not just in the visual field but also in the near extrapersonal area under these situations. This can also happen when the eyes are in a fixed location in the orbits and the fixation point is changed by head movements. On the background of an inclined rAI, the illusion of a violation of the visual vertical is also described. It turns found that throughout a wide variety of ocular vergence states, the synthesis of the field of rAI is unaffected. The characteristics of the so-called "residual illusion" are detailed. After the rAI has been entirely attenuated, all phenomena that have developed against the background of rAI persist in total darkness for tens of seconds. This also pertains to skewed optical vertical perception. It is offered to explore the theory, implying full nonparticipation of the efferent oculomotor subsystem signals in the mechanisms of visual field constancy and gaze direction, based on the examination of the rAI illusions and special qualities of the rich afterimage itself. constancy. According to the hypothesis, the visually rich picture allows the visual system to create a stable visual field and calculate the observer's gaze direction only based on the signals in the visual flow. The hypothesis enables a logical interpretation of the key events seen in the experiments. When the head is tilted to the shoulder, an oblique 3-D rAI is observed, indicating that the internal visual space (IVS) model, not the images on the retinas, is the object of vision.

Author (S) Details

Gary M. Zenkin
Institute for Information Transmission Problems, (Kharkevich Institute) of Russian Academy of Sciences, Moscow, Russian Federation.

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