Eyes

Similarity is boring, but differences are exciting. This hypersensitivity to difference is built into our being, all the way down to our retinas. You and I can see the visible world because our eyes wobble back and forth ever so slightly and uncontrollably, jerking this way and that in what are known as “saccades.” These eye wobble allow your retina to detect differences, changes in texture and contour and lighting, and it is this ability to detect changes in visual input that enables sight. Paralyze your eyes with anesthetic to keep them from wobbling, and everything goes dark. Place a contact lens with an image tattooed on it on your retina, and the design will slowly become invisible as the lens begin to wobble in sync with your eye. ~ Page 127