The brain needs to remember faces in 3-dimensions

In our dynamic 3D world, we can encounter a familiar face from any angle and still recognise that face with ease, even if the person has, for example, changed his hair style. This is because our brain has used the 2D snapshots perceived by our eyes (like a camera) to build and store a 3D mental representation of the face, which is resilient to such changes. This is an automatic process that most of us are not consciously aware of, and which appears to be a challenge for people with a particular type of face-blindness, as reported in the September 2010 issue of Elsevier's Cortex (http://www.elsevier.com/locate/cortex)...

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