BS
I'm trying to find an article by Mike Yardley for you.
Jack Mitchell is the guy who put me on to this.
Perhaps your guy is simply saying that eye dominance stops being the determining factor as one's eyes age and other vision changes occur such as one eye being more or less correct at a different basis than the other? This is essentially one of the complications with what is commonly called cross-dominance.
Not sure what you mean here but it seems you're saying that other factors can play into target aquisition. You can say the same about losing your right eye.
The author of that article is "Dave McCracken has been shotgunning longer than many shooters have been alive. He regularly posts on TheHighRoad.org and TheFiringLine.com. This article is reprinted here with his permission; reprinting or redistributing this article without his permission is expressly prohibited." No mention of his medical credentials.
The opthamologist who told me this is a board certified eye surgeon, specializing in pediatric opthamology and strabissmuss (double vision), and on the faculty of Albert Einstein school of Medicine in NYC. He tells me dominance doesn't change, until I hear it from a more accredited source, I believe him.
I believe your are correct if you're saying that eyes can age differently, making target aquisition harder. I think that's because, e.g., you are still right eye dominant but your right eye doesn't see as well as your left so target aquisition becomes a problem. Your dominance hasn't changed, it's just fighting harder, and you're shooting suffers.
