LUMINOUS FIGURES: INFLUENCE OF POINT OF FIXATION ON THEIR DISAPPEARANCE.
When a simple luminous figure is viewed in a darkened room, parts of the figure seem to disappear. Usually, the part that fades from view is the part on which the viewer's gaze is centered (fixated). Figure parts which are not fixated seldom disappear independently; they are lost to view only if the entire figure disappears.
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