[kraigwy]

It is well known that one should ALWAYS use eye protection while shooting.

One needs to shoot with both eyes open to prevent fatigue and balance. Closing one eye affects your equilibrium.

Knowing those two givens, we have the tools to learn to shoot with both eyes open.

Take some tape or paper and blot out or cover the lens of your shooting glasses of the non-shooting eye.

That way you can keep both eyes open and not be distracted by your non-shooting eye.

This also works for those who are cross eye dominant, or lets say you shoot right handed but left eye dominant. Cover the lens of your dominant eye and use your non-dominant eye.

With a bit of practice you'll be shooting with both eyes open with no distraction.