People with red-green color-blindness can suddenly
discriminate between colors they couldn’t see before.
By Ryan Cross, MIT Technology Review
June 27, 2016 -- Two colorblind brothers, Jimmy and Jace Papenhausen, were in for a surprise when their parents bought them a new pair of glasses. Jimmy’s dad was holding a handful of balloons, asking his son to name the colors. “Orange?” Jimmy answered. “It’s green,” his father replied.