Cover legend: When viewing a natural scene, the image on our retinas is in constant motion due to fixational eye movements. The nature of these eye movements is revealed by this illusion, which was first described by Hering in the 19th century. The reader is asked to fixate on one of the dots for ∼10 s, then switch the gaze to the other. The after-image on the retina appears to move due to fixational eye movements that jitter the "fresh" image on the retina. Under normal circumstances, we are unaware of this self-induced image motion, yet our visual system readily and robustly identifies object movement that is an order of magnitude smaller. This segregation of object and background motion is performed in the retina. For more information, see the article by Baccus et al. in this issue (pages 6807–6817).