That old chestnut... and it's bugging me - one eye or both? Everyone keeps saying both eyes open for better speed/depth perception. But I've been trying a bit of both and it seems that some targets are just better for me with one eye shut.
I'm right eyed and left handed - and I shoot from the right shoulder so my dominant eye is looking down the rib (I've shot this way for years before picking up a shotgun, so it comes naturally anyway)
Does it really matter? Or just go with what works for you?
Tough one to answer as eyes are not my specialist subject and without seeing a person shoot / gun mount / gun fit and testing dominance in real life offering a reply or solution over the internet is practically impossible.
Couple of points though.....
1). Some targets will seem better with one eye shut as you will see clearer definition of lead in cases like this
2). I believe as a woman you are more prone to eye dominance changes at various points in time - you sure this is not happening?
Now i can only relate my own experiences. I am right handed but left eye dominant (very) to the point in everyday life i am aware of hardly using my right eye. So i shoot off my left shoulder - always have done.
Here is the kicker though - even though my right eye is much weaker it is still officially 20/20 vision it is just that my left eye can easily read the bottom line of an eye test chart and is more peripheral vision reactive. BUT...... if i get tired or stressed my right eye can take over especially if the target is from the right.
For years to combat this i used to close my right eye, then i progressed to keeping open to acquire the target and then close to firm the lead picture and make the shot.
It was not until 2015 when i had a proper gun fitting session with Todd Nelson of Country Gentleman in the USA. He spotted something in my gun mount / fit which was hindering my eyes. Big decision time - i opted to totally rebuild my mount based upon getting the gun to fit this new mount style. He also recommended i try something else once i was comfortable with the new mount and fit.
Go to a patch on my right eye - patch is 1" x 3/4" and black tape - it pretty much blocks my right eye from seeing the barrel but allows me to shoot both eyes open all the time. Lot of people find it odd when they find out i am left handed / left master eye but partially tape my right eye still, but until you know my personal circumstances and how my eyes work it is nearly impossible to judge.
My point is the only way to be certain is to get your eyes, gun fit and gun mount looked at by someone who knows their stuff.