Young Woman or Old Hag?

This optical illusion is a classic example of how focused attention requires selection and rejection.  It is also a good example of how attention always implies a degree of “attention blindness,” since you can’t program your brain to focus on the young woman and the old hag at the same time. When you see one, you don’t see the other; your brain will not allow it.


 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

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