It's hard to understand how my six-year-old son Jasper experiences the world. He does not have enough language to tell us. He was born too early, too fragile, and as a consequence, he has a complicated medical history, which includes neurological blindness. Some with a similar condition have explained their visual experience as looking through a kaleidoscope or down the cylinder of a paper towel roll. We don't know what Jasper sees, but curiously, he finds pleasure in tilting his head and looking at the world sideways or even upside down.