DIY EyeSeeCam Tracks Your Eyes' Movement to Film What You See

Popsci writes, "A new German-developed head-mounted camera system tracks your eye movements, pointing a camera wherever you look and allowing you to zoom in on your view.

Four cameras are involved: Two cameras measure your eye positions in 3D at super-fast speeds, up to 600 Hz, watching your eyes via an acrylic reflector. Another camera offers a zoomable view of what you're seeing. The fourth is steered by servo motors to match whichever way your eyes move."