20+ min read · 2020-02-23 · Click. Click. To Daniel Kish, that’s the sound of sight. He was born with retinoblastoma, and doctors had to remove his eyes to save him. As a child, Kish started clicking his tongue to navigate the world. Many blind people spontaneously start using echolocation – snapping, clapping, clicking their tongues – in childhood, but their parents, doctors and teachers generally put a stop to it because they fear the social stigma its strangeness elicits. Kish wants to change that.