Figure 8.25: Efficient and inefficient reaching for an object People with damage to the “what” pathway reach for an object in the efficient manner depicted in (a), even though they can’t consciously see the object’s shape. In contrast, people with damage to the “where-and-how” pathway reach in the inefficient, groping manner depicted in (b), even though they can consciously see the object’s shape.
Sight Unseen: An Exploration of Conscious and Unconscious Vision (2003) by Goodale, M. A. & Milner, A. D. “By permission of Oxford University Press”.