I knwo from Racing Bikes and Cars (Road Course) that you can divert attention to the four quadrants without maving your eyes off of POA.
Here is a lil drill to try while dry firing. While looking down the sights, place your attention to the Upper right hand of your visional plane while still maintaining sight picture. Now move your attention to the Upper Left of your visional plane.
Where you still able to have some semblance of sight picture??? If so I gather this will help you with your reloads as you can divery your attention to the lower Left or Right hand Quadrants and still maintain your attention on sight picture. I have practiced this and have become pretty profficient with it.
I shoot strong Right hand and am capable of maintaining a decent sight picture for when the reload has been completed. I drop my left (weakhand) to my spare mag and can trace it via attention and not eye movement to my mag well. Initially I was tracing it with my actual eyes and not my attention and would lose time as it did not feel as fluid and reacquiring sight picture/alignment also added time.
I hope it works for you all.
~Andy