How do predators use their vision to both navigate through the terrain while tracking prey running for its life? Pursuing prey through a complex environment is a major challenge for the visual system, as not only does the prey constantly change direction, sometimes in the opposite direction to the pursuer, but running after something evokes self-induced motion-blur that degrades vision. How do predators use their vision to both navigate through the terrain while tracking prey running for its life? Pursuing prey through a complex environment is a major challenge for the visual system, as not only does the prey constantly change direction, sometimes in the opposite direction to the pursuer, but running after something evokes self-induced motion-blur that degrades vision. Plants & Animals Ecology Phys.org – latest science and technology news stories