|No mere fashion statement|
In Small Miracles, I put computer-interface eyeglasses on the main character. Those glasses tracked where Brent was looking -- within the software-displayed image projected by the lenses -- by monitoring IR beams reflecting off the back of the eye. Input was entered via (trained) blinks made looking at menu items and virtual-keyboard keys. All any friend, relative, or colleague saw was his mirrored lenses. Eerily silent and quite antisocial -- but that was the point. Brent was no longer himself, exactly, and I wanted to show him losing touch with humanity.
That people may really go around online like this? I find that scary! And that Android will be the underlying software is all too ironic.