Re: How to train my left eye to stay open?
I keep coming back to this.
About the only way I can naturally manage to keep both eyes open is to actually be using both eyes for what I'm currently doing.
This works with reflex/dot sights just fine. I engage the target with both eyes, then bring the firearm up so the dot/reticle is on my POA.
But when irons or magnification are involved, the other eye has no work to do, so it naturally closes. Trying to change that is simply too much distraction to allow the main task, maintaining a sight picture, to proceed with reasonable success (for me, at least...).
Research shows that you can train our eyes to do just about anything, including reversal of eye dominance.
But the real question is why?
If you can hit the target, you're already where you want to be.
Trying to keep the eye open when it's unnatural, just because "we're supposed to", seems counterproductive to me.
Greg