This is frightening! It works exactly
like it says, and is one major reason people in cars
can look right at you (when you're on a motorcycle or
bicycle)---AND NOT SEE YOU.
From a former Naval Aviator:
This is a great illustration of what we were taught about scanning outside
the cockpit when I went through training back in the '50s. We were told
to scan the horizon for a short distance, stop momentarily, and repeat
the process. I can remember being told why this was the most effective
technique to locate other aircraft. It wasemphasized (repeatedly) to NOT fix
your gaze for more than a couple of seconds on any single object.
The instructors, some of whom were WWII veterans with years of experience,
instructed us to continually "keep our eyes moving andour head
on a swivel" because this was the best way to survive, not only in combat, but from
peacetime hazards (like a midair collision) as well.
We basically had to take the advice on faith (until we could experience for
ourselves) because the technology to demonstrate it didn't exist at that time.
Click onthe link for a demonstration.