If money were no object, Kish believes that blind people could essentially mimic bats within five years. A next generation of K-Sonar, using the input from a global consortium of scientists that Kish has been corresponding with, should have a nearly limitless range. Our hearing, Kish says, can be increased tenfold through surgical augmentation — basically, inner-ear microphone implants. Combine the two and it’s possible that the blind will be able to take up tennis. Kish figures it would require $15 million to prove whether or not his idea is feasible.

Men’s Journal » The Blind Man Who Taught Himself To See