People are faced with some crazy stuff everyday. If it wasn't for our super intelligent thing in our heads (well more for some than others) we would not be able to survive half as well as we do today. Well known artists such as M.C. Escher have been using illusions for a long time to mess with our brains. Their abilities allow them to perceive us when viewing certain pieces of art. This heightens our illusions and messes with our perception.
Perception is when our senses meet our brain. But this doesn't come first! Sensation does and this is how we can first come to all of these amazing things. They are transducers for our central nervous system. In this illusion the artists use the perception topic of perceptual hypothesis: perceptual sets. In a perceptual set our expectations influence our perception. What do you see in the picture? How many horses do you actually see? There should actually be 7! These hypotheses come from just guessing what's out there. Our brains rely so much on our knowledge and experiences that we can sometimes get away with what we are actually taking in from our senses. But not this time. When do you think artists started to use illusions in their artwork and why? Also, can you think of any other perception topics in this illusion or in others that you've seen in your daily life?