 A second neuropsychological phenomenon also highlighting putative unconscious vision is blindsight which results from lesions in primary visual cortex (V1) typically leading to blindness over the part of visual space contralateral to the sight of the lesion (Weiskrantz 1986). For example, left hemisphere V1 deals with right visual space, so lesions in left V1 lead to deficits in seeing the right side of space. Subjects then report that they cannot see a visual stimulus in the affected visual space. Strikingly, these clinically blind subjects can draw on information from the “unseen” stimulus to visually inform behavior regarding it, often in striking ways. For example, a blindsight patient with bilateral damage to V1 (i.e., in both hemispheres) who is blind across the visual field can walk down a hallway around obstacles he reports being unable to see (Gelder et al. 2008). Blindsight patients see in the sense of visually discriminating the stimulus to act on it yet deny that they see it. The contrast between behavior and report leads to the paradoxical term, “blindsight”. Like DF, blindsighters show a dissociation between certain actions and report, but unlike DF, they do not spontaneously respond to relevant features but must be encouraged to generate behaviors towards  them.[11]