US football players
Media playback is unsupported on your device
Video

Could eye-tracking tech make American Football safer?

About a quarter of professional American Football players are expected to develop Alzheimer's disease - double the rate of the general population.

But a study at Stanford University is aiming to detect when a player is concussed almost immediately by using eye-tracking technology.

BBC North America Technology Reporter Dave Lee reports for BBC Click.

  • 28 Jan 2016
Go to next video: Could we see 3D printed human organs?