ylatayaeray:The mask depicted above is hollow. One side is concave the other, convex. However despit
ylatayaeray:The mask depicted above is hollow. One side is concave the other, convex. However despite how hard we try we can only see two concave faces. This is an optical illusion. So why does this happen? The brain is said to have specific regions dedicated to processing faces. We know that faces are convex from our experience and knowledge so our brain processes it in a way that makes sense to us and matches our expectations. This is so strong that it entirely over rides reality even when we are aware that what we are seeing is wrong, it is impossible to stop ourselves from perceiving it as a convex protruding face!However this optical illusion actually fails to work on those with schizophrenia. This is to do with their unique way of processing information. -- source link
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