Plugging right in to that eerie "they're watching me" feeling you're supposed to
get from normal portrait paintings, Opto-Isolator is an artwork that
takes the sensation into the scary, robotic 21st Century. Its
realistic-looking eyeball actually responds to an onlooker's gaze with
a bunch of human-like movements, including coy side-glances and blinks.
Article Link (Gizmodo)