The latest entry of the AtMac blog highlights three individuals who control their iPad with their nose. The second of the three is visually impaired and, as far as I know, has no issues with her hands. I'd like to see someone encourage her to give Zoom or VoiceOver a try.
http://atmac.org/nose-control-ipad-mac -- Feel free to visit my Web site http://www.davidgoldfield.info David Goldfield, Assistive Technology Specialist