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While eyeball tracking used to be achieved using painstaking manual mapping of direct observations, more recent technologies have made it much easier and more precise. High-tech contact lenses, for example, can now be used to map and record eye movement to provide data that’s used in everything from driver training to sports development to gaming, virtual reality and medical research. Still, the dominant commercial application by far is in advertising and usability – working out how different designs steer the eye towards a final goal most effectively.
But for people with certain motor disabilities, particularly those who don’t have good control over their hands or voices, eye tracking can take on a much more important role, as a hands-free computer interface that can be a fantastic aid to communication, and a much easier alternative than the head wand or mouth stick, which are used to tap on a keyboard.
