Although unable to report the width of a block in front of her, a woman identified as D. F. could grasp the block with just the right finder-thumb distance. Her experience best illustrates'

blindsight

Explanation:

Blindsight refers to the unconscious ability to respond to visual stimuli while not consciously perceiving it. This suggests/shows that sometimes acting on information may not require conscious awareness of that information. Blindsight occurs as a result of brain damage, specifically I'm the primary visual cortex.