There is a word that describes someone who is unaware that they are different or disabled.For example, someone who can't smell but is unaware of what smelling is so they think they are the same as everyone else. What is this word?
Anosognosia: a condition in which a person who suffers disability seems unaware of the existence of his or her disability.
or as previously suggested:
Oblivious: not aware of or not concerned about what is happening around oneself