The cooperative action of different regions of our brains gives us an amazing capacity to perform activities as diverse as playing the piano and hitting a tennis ball. Somehow, without conscious effort, our eyes find the information we need to operate successfully in the world around us. The development of head-mounted eye trackers over recent years has made it possible to record where we look during different active tasks, and so work out what information our eyes supply to the brain systems that control our limbs. We are now in a position to explore the strategies that the eye movement...