Usually, the optical illusions play tricks on either the sound or the sight. However, the new illusion created by the scientists at the California Institute of Technology will trick both the senses. The illusion involves a cross, flashes of light, and some sound. It is called Rabbit Illusion. It shows how the stimuli which occur later can affect the perception of the stimuli which has already happened. This means that if the senses pick up on one stimulus after the other, the brain will try to create a narrative out of them. This phenomenon is called postdiction.
Noelle Stiles, a visiting postdoctoral scholar-research associate from USC, explained the Rabbit Illusion, “When the final beep-flash pair is later presented, the brain assumes that it must have missed the flash associated with the unpaired beep and quite literally makes up the fact that there must have been a second flash that it missed. This already implies a postdictive mechanism at work. But even more importantly, the only way that you could perceive the shifted illusory flash would be if the information that comes later in time—the final beep-flash combination—is being used to reconstruct the most likely location of the illusory flash as well.”
The human brain is full of all kind of strategies which make sense in normal life but can be tricked easily. There are some other strategies apart from Rabbit Illusion as well; like Troxler fading which makes the things disappear which are not moving.