The Eye Tracker is a new and promising method to diagnose neurological problems after concussion like injuries. To me it looks like a fast and inexpensive way to diagnose PCS.
The technology looks relatively simple giving hope that it will actually be used by medical personnel to diagnose lingering brain injury.
Watch more in this video (1½ min long):
http://edition.cnn.com/video/#/video...ye.tracker.cnn
-Glasshead