The earliest example I've come across, which I included in the brief, is at three years. There isn't a vast amount of information out there on this technology at this point, but three years old was the earliest. There are other types of diseases, dystonia would be another example, where it could be used.
Of course, there are some conditions that it would not be used for. There are types of muscular dystrophy that affect the use of eyelids, and a person's eyes are not able to be open or be gazing in that way, so it would not be effective there. Especially with neurological conditions, some of them.... This is interesting, because it's starting from children. The interesting thing is that when someone develops a disease, an example could be Parkinson's or Alzheimer's, something they develop later in life, we already have an understanding of that person's likes and dislikes, their intellect level, all of that sort of thing. We already have that; that person's sense of autonomy has already been carved out. So when they develop a disease, a caregiver or health care provider, if they're taking the right amount of input and interest in the person, is able to continue care in that way. This eye-gaze technology, especially starting at three years of age, sets the person up to be able to start saying what their likes and dislikes are, and as I said, get that autonomy.
It's important that there be a lot more work done, a lot more studies out there about this information, and to be using it as early as possible.