Imagine that you’re locked-in, unable to communicate except by blinking a single functional eye. Your only method of communication is to watch (and listen) as a helper reads through a list of all the letters of the alphabet. When you want to select a letter, you blink. Can you imagine this? Can we do more than imagine it? On the modern web, we can! Using React and WebGazer.js (an open-source eye-tracking library for the web), we can approximate this communication technique, the method that Jean-Dominique Bauby used to compose his best-selling memoir The Diving Bell and the Butterfly.