1
In fact, his travelogues spend amazingly little time discussing his blindness. Only one passage stands out for its frank discussion of his handicap and how it changed his worldview. In it, Holman was reminiscing about a few rendezvous from his past. Disarmingly, he admitted that he had no idea what his paramours looked like, or even whether they were homely. Moreover, he didn't care: by abandoning the standards of the sighted world, he argues, he could tap into a more divine and more authentic beauty. Hearing a woman's voice and feeling her caresses -- and then filling in what was missing with his own fancy -- gave him more pleasure than the mere sight of a women ever had, he said, a pleasure beyond reality. "Are there any who imagine, " Holman asked, "that my loss of eyesight must necessarily deny me the enjoyment of such contemplation? How much more do I pity the mental darkness which could give rise to such an error. .Sam Kean
2
This hinted at something that no one had ever suspected -- that the brain tracks moving things more easily that still things. We have a built-in bias toward detecting action. Why? Because it's probably more critical for animals to spot moving things (predators, prey, falling trees) than static things, which can wait. In fact, our vision is so biased toward movement that we don't technically see stationary objects at all. To see something stationary, our brains have to scribble our eyes subtly over its surface. Experiments have even proven that if you artificially stabilize an image on the retina with a combination of special contact lenses and microelectronics, the image will vanish.Sam Kean
3
In these days before antiseptics, doctors themselves also suffered high mortality rates. Florence Nightingale, a nurse during the Crimean War (1853-1856), watched one particularly inept surgeon cut both himself and, somehow, a bystander while blundering about during an amputation. Both men contracted an infection and died, as did the patient. Nightingale commented that it was the only surgery she'd ever seen with 300 percent mortality. .Sam Kean