OK, yes you still can. But check this link out. It's crazy how it works.
"In a motor accident, wherein a speeding car hits a slower moving vehicle coming from the side, the speeding car drivers often swear that they just didn’t see the vehicle coming from the left or right.
Well, they aren’t lying. They really don’t see the vehicle coming from the side, in spite of broad daylight.
This phenomenon on the car drivers’ part is known as “Motion Induced Blindness”. It is definitely frightening.
Once airborne, pilots are taught to alternate their gaze between scanning the horizon and scanning their instrument panel, and never to fix their gaze for more than a couple of seconds on any single object. They are taught to continually keep their heads on a swivel and their eyes always moving. Because, if you fix your gaze on one object long enough while you yourself are in motion, your peripheral vision goes blind.
Till about three decades ago, this “heads on swivel & eyes moving” technique was the only way to spot other aircraft in the skies around. Now-a-days they have on-board radars, but the old technique still holds good."