The I Contact is a prototype contact lens that will act as a mouse for your computer. The design is really quite simple; tiny microchips in the lens will track your eye movement and display the mouse on the screen correspondingly. It is in development for disabled people in particular, but still, who wouldn't want to try it out. I can't really imagine what one would have to do in order to click, but forced blinking would make the most sense. All in all, the concept is really quite amazing. I haven't been able to find an estimated release for this, but I will be on the lookout.
