Do Babies See The World Upside-Down?


Do Babies See The World Upside-Down?



When a baby is first born, there's all sorts of crazy stuff going on: its lungs wake up and let out a cry (but no actual tears, since baby tear ducts aren't fully formed), it's often covered in fur (called lanugo, which keeps the fetus warm in the womb), and it might even be seeing upside-down.


Which Way Is Up?


Why upside down? Because that's how your eyes actually perceive the world (before your brain crunches the data, anyway). That's due to the process of refraction through a convex lens—that is, the bending of light through a surface that bows outward in the middle, like your eye or a camera lens. In the 17th century, French philosopher and scientist René Descartes proved this by replacing the retina of a dead cow's eye with a screen. The screen showed a flipped version of the scene in front of the eye.


All In Your Head


So why do we see the world right-side up while experts think newborns see it upside-down? Brain development. Our brains have learned to automatically flip the images that hit our retinas so we perceive our reality right side up. Babies' brains haven't quite learned to do that yet, and until they do, it is believed that the babies live in an "upside-down" world.
It's not much of a drawback for them, considering that newborns also can't see color or focus beyond about 12 inches (30 cm) in front of their faces. Still, improvement happens quickly: by the time they're a week old, babies can respond to movement and focus on their parents' faces—which by then appear perfectly upright.

Matthew UrbanComment