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Movie star Brad Pitt has facial blindness. This is a
disorder that makes it
to recognize people's
. Sufferers can forget the face of a family
or their own face. The
is called prosopagnosia. It affects about 1 in 40 people. It causes
in social situations. Sufferers avoid
in which they will meet people. They may become
. In extreme
, they may not leave their
.
