Alexander Kostov, who has spinal muscular atrophy, can't play video games using a keyboard or controller. Instead, he uses special equipment—voice controls, hand switches, and so forth.
Here's a lovely little story: Lee, a British gamer with spinal muscular atrophy, was able to play and complete Grand Theft Auto V thanks to the British charity Special Effect. His testimony is worth your time—it's interesting and poignant. Video above.
Maybe what drew you here is the chance to watch someone play a video game using technology that tracks eye movement. But make sure you stick around to hear about the people who make that possible.