Visual perception--a hypothesis.
Based on the results of after-image experiments, it can be concluded that the retinal perception of image position is linked to head position information, since this affects after-image positioning. Why actual perception of object position is not affected is hypothesised as a resetting of the retinal horizon, from information received on head position. Tilting of the after-image is thus explained as superimposition of the former image on a reset (tilted) horizon (axis).
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Ahmadu Bello University, Zaria, Nigeria.
D000360:Afterimage / Q000502:physiology; D006801:Humans; D008954:Models, Biological; D011187:Posture; D012160:Retina / Q000502:physiology; D014796:Visual Perception / Q000502:physiology*