Subaru models equipped with EyeSight have a rather large pair of cameras hanging from the top of the windscreen. Makes it look a little bit like you have WALL-E along for the ride.
That's kind of appropriate. Pixar's fictional WALL-E robot acquired human characteristics; EyeSight's twin cameras attempt to emulate human vision by seeing in three dimensions. It recognises and assesses potential problems, providing seven active safety functions.
By monitoring the traffic ahead and recognising the position and speed of other vehicles on the road, EyeSight can help avoid a potential collision by assisting the driver to brake when needed, or take over braking automatically if it perceives the driver has not acted to avoid impending high-speed impact.
Eyesight also provides pre-collision throttle management around town. Imagine the classic scenario: the car in front at an intersection moves away but suddenly stops. A nose-to-tail tap ensues, because you're busy looking for approaching cars from the side rather than the vehicle in front. EyeSight will watch that car for you and retard the throttle to prevent impact.
EyeSight provides adaptive cruise control up to 145km/h, automatically keeping your car the right distance from the vehicle in front. It can "lock on" to that vehicle and take you to a standstill in heavy traffic. When things start moving again, it will give you an audible prompt to re-engage the cruise control and keep driving.