I'm a lefty, and all the tests I do show me as left eye dominant.
But when I focus on the front sight, everything behind it doubles, and nothing in my non-dominant eye fades away. Actually the "brighter" thing usually wins. Since most backgrounds to targets are darker than the targets themselves, this means I see two fuzzy targets behind the front sight post. I've just learned to target the left object with the front sight and ignore the right one.
When I am shooting a 3x5 card it looks like a 3x10 card until it gets far enough away that the two images split. It will be a 'stronger' white (against the brown backer) in the middle, but not enough to work with.
This is a real bitch on dot torture as the dots cross-stack on me and I'm seeing an array of 5 dots sometimes.
Squinting my right eye helps, but seeing as how I've just become able to shoot with both eyes open, I don't want to move back in the other direction.
Any thoughts? Or is it just something that should hopefully get better with time as I get more used to shooting with both eyes open? (which is really only the last year)