There is a little device that non-traditionalists often use on shotguns that accomplishes the same thing. It is a long front sight that has a fluorescence when viewed from directly behind, but not with the "off eye", which is at an angle. They are usually either green or orange. Many people mistakenly put them on their gun for duck hunting in very low light thinking they will "help them see the front sight" better in very low light. This line of thinking is counter-productive to good shooting as it sometimes causes one to look at the front sight rather than at the duck.
It's real value is for those with a dominance shifting issue, like you mentioned, as it causes the proper eye, the one behind the rib, to "gain more traction" as you so deftly put it. They look like death eating a cracker to me, but they work for that purpose. I guess the ducks don't know the diff.
Best, SRH
