The human body and brain are amazing.
I shot A LOT during my career. I was always right handed, right eye dominant. As part of our training we did our best to be ambidextrous with weapons and one hand disabled for possible injury etc.
I always shot those handgun drills with my right eye though, no problem.
Fast forward to another chapter of "What is gonna fail with age today?"
Over the last couple years, my right eye has developed some issues. The worst is that my retina developed some unwanted tissue which wrinkled it and distorts the image. Add a dose of cataract starting and it's not a good view.
The amazing part is that as this happened I didn't really alter the schedule of my shooting. I fairly regularly went out to punch holes and ring steel.
Going back to the first line, the amazing part is that somewhere along the way my brain switched me to left eye dominant without me even consciously choosing to do so. I had just shifted my head a bit and continued shooting at my usual level.
The wake up call was when I had not shot rifle for a while and the right eye had worsened.
I took a scoped AR out and when I brought it up, I could not see the target or reticle just blur.
I wondered how I could shoot so well with a handgun with that much of a problem.
So I cased the rifle and picked up a pistol and looked at the target.
I usually shoot both eyes open, so imagine my surprise when I closed my left eye.
It happen without my thinking about it and feels just as natural from a draw or benchrest with no noticeable change in accuracy.
My brain even seems to ignore the glary blur that has become my right vision.
I don't know if the right eye will ever be acceptable again.
With one surgery to remove the tissue done, the view has not changed, so I don't know if it will be good after cataract surgery either.
Meantime I have added lefty rifle training to my regimen.
I could always shoot it well that way but I have to get the other skills down, reloads, malfunctions etc.