I was taught that (if looking down the plane of the rib) the bottom of the Iris of your eye should be even with the rib. Newer shooters now have the Iris a couple of inches above the rib. What is correct?
I’ve also noticed that you can see the bird more clearly the higher your eye is above the rib.
Thanks Andrei Erdoss for your comment!
Bottom of Iris should be right on top of the front bead as viewed in a mirror for 50/50 POI