Face blindness, recognition and emotion recognition problems are common yet largely unrecognised problems. They lead to difficulties with mimicry, friendship and emotional problems and often cause great fear of situations in which there are a number of people eg school classrooms. In most cases we can help.
typical face distortions found in prosopagnosia (the first one is not distorted - I really lok like this!)
to quote a parent
"the smiling is a huge thing - she now can do it, she's stopped being covered in bruises and my time has been freed up dramtically! Thank goodness I didn't have to read yet another Harry Potter to my 15 year old"