This chapter discusses a selected set of neuropsychological disorders and enquires whether analysis of eye movements can help explain the nature of the disorder. It argues that the study of such patients can in turn inform theories of vision and visual cognition. The chapter starts with a discussion of blindsight, visuo-spatial neglect, Balint's syndrome, and disorders that result from damage to the frontal lobe. The second half of the chapter concentrates on a single case, AI, who is not able to generate eye movements and so instead generates saccade-like movements of her head. The case is discussed as an example of peripheral neuropsychology, and the implications for the active vision framework are emphasized.
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