How to Find Your Dominant Eye

The short answer: Your dominant eye is the one your brain trusts to aim. In shotgunning, the gun should be mounted on the same-side shoulder as your dominant eye — because the barrel is really just the line from that eye to the target. Find it with a two-minute test before you worry about anything else.

Shooting is a visual sport — you point the gun, you don't aim it like a rifle. And pointing only works if the right eye is in charge. You're born with a natural dominance, left or right; it lives in the brain, not the trigger hand. So the first thing to know about yourself isn't your stance or your gun — it's which eye leads.

The two-minute test

  1. Both eyes open, stretch your arms out and make a small triangle between your hands.
  2. Frame a distant object (a doorknob, a light switch) inside the triangle.
  3. Keeping both eyes open, draw your hands straight back to your face.
  4. The triangle lands over one eye — that's your dominant eye.

If your dominant eye is on the same side as the hand you'd shoot with, you're lined up the easy way. If it's the opposite side, read on.

What if it's the “wrong” eye? (Cross-dominance)

You're cross-dominant when your shooting hand and your dominant eye are on opposite sides — a right-handed shooter with a dominant left eye, or the reverse. It's the most common eye problem in shooting, and here's why it matters: to point a shotgun correctly, the gun has to sit under your dominant eye. If you mount on your hand's side but your other eye is the boss, the picture is like driving a car from the passenger seat — the line never quite lines up.

The usual “fixes” — closing one eye, switching shoulders, sticking a patch on your glasses — all work by throwing away half your vision. And binocular vision is exactly what lets you judge a target's depth, speed, and angle. Give that up and you've traded one problem for another.

The better fix

Bill Erdőss designed a device — the XD / Erdőss Vision — specifically for this: it stops the non-shooting eye from taking over the aim, while letting you keep both eyes open for full depth perception. You shoot from your natural, handedness side and keep your binocular vision. Take the test above first; if you come out cross-dominant, that's the path worth knowing about.

About the method. These guides come from the coaching system of Bill Erdőss, an Olympic clay shooting coach, built around one idea: diagnose the cause of a miss, not the symptom. The same logic powers ClaysBuddy's shot heatmap, which finds that cause in your own rounds and tracks whether your fix is working.