Introducing some visual illusions

• What is the Ponzo illusion?

  Misinterpreted depth cue
• How do we perceive the horizontal line in the Ponzo illusion?

  As longer when placed higher up
• What is the Müller-Lyer illusion?

  Misinterpreted depth cue
• How do the two vertical lines appear in the Müller-Lyer illusion?

  They are the same length
• How is the line with outgoing fins perceived in the Müller-Lyer illusion?

  As longer than the other line
• What is Rubin's vase?

  Ambiguous figure
• What can be seen in Rubin's vase?

  Face and vase simultaneously
• How does the brain interpret Rubin's vase?

  It alternates between the two images
• What is the Ames room?

  Misinterpreted depth cue
• What is the shape of the Ames room?

  Trapezoid
• How do people appear in the Ames room?

  As different sizes despite being the same