Dead-eye syndrome
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Dead-eye syndrome is a condition in computer generated films where the human characters appear artificial and vaguely frightening because their eyes are not moving in a recognizably "alive" manner. This problem typically arises with computer generated characters made using motion capture technology. Since so much of human expressivity is determined by eye and eyelid movement, and since motion capture is unable to capture such subtle gradations, computer characters' eyes seem fixed and dilated, giving the feeling that the characters, though in motion, are dead.
Though it was not the first film to use motion capture technology, The Polar Express is generally regarded as the first film where the dead-eye syndrome was most noticeable and most distracting.
