These Synthesia Glasses Help Blind People “See” Via Sonar

People who have been blind since a young age can sometimes learn to develop a sort of low-grade echolocation. This technique, used by the likes of Ray Charles, Stevie Wonder, Ronnie Milsap, and Ben Underwood, works much the same way as it does in bats and dolphins. But people who have just recently lost their sight… » 7/12/13 11:30am 7/12/13 11:30am