Try this out.
iOS 7 Beta 2 has an Accessibility feature that lets you control any iOS 7 device with head movements. This was discovered by 9to5Mac and demoed in the video below.
"We've tested this ourselves and found it to be quite accurate, but it's quite tedious to control your device this way since it cycles through all of the options on the screen and you move your head when it is bordering around the option you want," Scott Buscemi reports for 9to5Mac. "You can also make the left or right head movement act as a home button, start Siri, open Notification Center, open the App Switcher, decrease volume, increase volume, or simply tap."
Have you tried it? What so you think about this new feature?