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blindsightA clinical condition caused by occipital lobe injury, in which a person is functionally blind in part of their visual field, yet are capable of responding in part to visual stimuli.
Type 1—subjects are completely unaware of any visual stimulus, but capture some features of the visual stimulus—e.g., location, or type of movement.
Type 2—subjects have some awareness (e.g., movement within the blind area), but no visual perception.
The ability to see that occurs in persons who are blind because of a brain lesion rather than damage to the eye. It is manifested by their being able to reach for and track an object. These individuals apparently do not know they can see.
See also: sight