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Ability of people to see things without being conscious that they are seeing them. (e.g., blinded soldiers were seen to duck bullets even thou they had no ideas they were doing so). Reflex actions do not involve cortical activity (e.g., clutching and reacting to pinpricks). A subsection of the visual cortex (V1) lights up during blindsight. (Carter, Rita, Ed. Mapping the Mind. p 185-187. CA: University of California Press, 1998.)