Apple devices support "Switch Control", which stands for a family of devices that translate some signal that the user is capable of providing (blinking, tongue

Apple devices support "Switch Control", which stands for a family of devices that translate some signal that the user is capable of providing (blinking, tongue clicks, etc) into a button press. This can be used to select from a menu of options that the OS presents: https://support.apple.com/en-us/HT201370 https://support.apple.com/en-us/HT201370 Imagine a high tech version of Hector Salamanca's bell in "Breaking Bad": https://www.youtube.com/watch?v=pWso-qRaIlM https://www.youtube.com/watch?v=pWso-qRaIlM I believe there are various levels of such control, depending on how much mobility the user has.