This will prove I'm a Boomer, and possibly annoy all the smart kids here, but I was taught as far back as 1977 by a guy named Cooper that you focus on the front sight for every dry fire and every round fired in practice and training. That way, when the stinky brown stuff hits the air circulation device your hands, arms and shoulders know how to align the handgun with where your eyes are looking, no matter if you can see the sights or not.
My experience over the years proved that to be true, but I suspect it's all out-dated now. OK, I'm going to take my meds and go lay down for a while. (smile)
Dave