What’s amazing, of course, is that Smith can steer a pointer with his brain well enough to text with his wife at home and answer our emails. “I leave it for experts to argue about that!”The eye tracker Smith previously used to type required low light and worked only indoors. “I was basically Batman stuck in a dark room,” he explained in a video he posted to X. Researchers have been studying how ALS patients feel about the idea of aids like language assistants. Smith told us he wants to take things a step further.