High-functioning autism (HFA) and Asperger Syndrome (AS) are autism spectrum conditions (ASC) characterised by difficulties in social and communication functioning alongside repetitive behaviour and restricted interests. Among the main features of these conditions are deficits in understanding others, particularly inferring mental and emotional states. Atypical gaze is common in people with ASC, and lack of gaze following is one of the earliest observable behaviours in ASC. People with ASC show deficits in gaze following, joint attention, mutual gaze, and they make less eye contact in social situations. While typical controls show expertise for detecting the gaze direction of others using a heuristic involving a dark pupil/iris within a white sclera, people with ASC show reduced expertise for the perception of gaze direction, particularly in conditions when eye information is more ambiguous