Visual twisting is a distortion of a person's field of view, in which regions of one’s visual space appear to be curling or spiraling about a common center. This effect varies in its intensity, ranging from subtle and barely visible, to extreme and all-encompassing. At its stronger levels, visual twisting can render an individual unable to resolve objects or have any sense of depth perception, which in turn completely impairs their sense of sight. Visual twisting is often accompanied by other coinciding effects such as drifting and visual stretching. It is most commonly induced under the influence of heavy dosages of hallucinogenic compounds, such as psychedelics, dissociatives, and deliriants.