Visual Illusions

• Ponzo

  Converging parallel lines similar to railway tracks,with two separate identical lines across. - the upper line appears bigger

  
• Mullerlyer

  two identical lines with arrow shapes either pointing in or out. The line lengths with arrows pointing in appears to be larger than with arrowd pointing out.

  
• Rubin’s vase

  image that can be viewed either as two faces looking at each other or as a vase- the brain often switches between the two perspectives

  
• Ames room

  3 dimensional room structure that appears to be a normal room but is distorted so it appears people moving within the room grow and shrink

  
• kanizsa triangle

  circles missing a section and lines , cause the illusion of perceiving a non-existent triangle in the centre is lighter than the background

  
• necker cube

  a wire frame drawing of a 3D cube that can be interpeted as having either of the two sides facing out

  
• Ambiguity: having more than one possible meaning or interpretation

  Fiction: the perception of an object or movement that is not present in the stimulus

  Misinterpreted depth cues: when a depth cue is used inappropriately

  Size constancy: the way we keep our original perception of the size of an object, even when the information received by the eyes changes

  Visual illusion: a visual perception which is wrong or misinterprets what is actually there in reality