I was taught to shoot with both eyes open and never saw a need to change.

When I used to work in Smart Weapons technology Research and Development at the Air Force Armaments Laboratory, all optical issues were explored.

Assuming both eyes work equally well, your brain makes the decision of which eye to read for what purpose.

The stereoscopic information received when you first acquire the target with both eyes open gives a good estimate of the range.

From this point on, it doesn't matter if both eyes are open.

Eye dominance likewise makes no difference.

Unless you have a Bad Eye.

The dominant eye will, at this point, track the target unless you close it.

You can keep both eyes open at this point and kid yourself about seeing with both eyes open, but it just ain't happening.

Man makes machines in his own image.

These issues have been explored in the Weapons Community for centuries.

Those imaging sensors are the result of multi-million dollar efforts that lasted for decades.

There is no weapon that uses stereo vision for the end game.

I was your Laser Sensor Team Chief, and I developed Compact Solid-State Laser Radar from concept to captive- flight testing.

It was a 3-D ranging sensor, but it had only one optical aperture.

Anything I don't know about optics and imaging for target acquisition hasn't been invented yet.

two eyes

Shotguns, scoped rifles, and handguns when fired natural point in combat all with both eyes open. With shotgunning both eyes are needed for depth perception (range). A scoped rifle will come up on target faster when both eyes are used. No fighter, including gunfighter, goes into battle with one eye closed.

Both open unless I am shooting thru a scope.

Sometimes the way I shoot, I think I have both eyes closed.

I used to shoot with one eye open, now I shoot with one eye closed...

i shoot with both open. thats what i was taught. never tried to shoot with one eye closed.

Both eyes open unless I'm shooting a slug farther than about 50 yds

A shotgun is fired more accurately with both eyes open given the dominate eye is the eye over the barrel, and becomes the back sight. Both eyes open then provide you a bigger field of vision, and a more accurate depth/distance vision as well as determining how fast the object is flying based on the field of view, and how fast it is moving against the backdrop.