What other things do you worry about first? As an umpire I observe what I observe. I don't stare at a player's feet to figure out if he steps out of the box. I don't go out of my way to look for any infraction. On the other hand, I don't ignore what I do see. If my peripheral vision allows me to see the infraction, fine. If not, I can honestly say to the opposing coach that I did not see the infraction. What I won't do is see the infraction, and then ignore it. That was my point.