Form a triangle with the index finger and thumb of both hands in front of you and look through it at an object. Close one eye, then repeat with the other.
One eye will seem to cause the object to shift , the other eye will retain the object within the triangle......this is your dominant eye.
I'm left eyed

You should always aim with your dominant eye.........maybe even use that dominant eye to see while viewing AH in a highly drunken state.