What a good post-snap read really looks like
Lots of quarterbacks swivel their heads to seemingly survey the field. Some are probably even making meaningful reads when they do so. Many are not, either going through the motions or just looking for a wide open target. To me though the measure of a quarterback’s read is how quickly they balance two major considerations: how open the target and how valuable the target.
It’s often not necessary to “see the whole field” as is often stressed. The design of the play and pre-snap read should reduce the need to look at every route.