Is being able to shoot an iron sighted pistol precisely with both eyes open a useful/necessary skill?
I shoot both eyes open when shooting a pistol with a red dot on it, but never with iron sights.
Occasionally I will see others at the range shooting with both eyes open, and have some curiosity/skepticism about it.
http://blog.beretta.com/Shooting-Tips-Accuracy
"Shooting with both eyes aids survival. Research has found that both eyes will remain open during a shooting. This is instinctive and cannot be controlled. Therefore, it would be advantageous to learn to shoot with both eyes before being faced with a deadly force situation."