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ShootingStar wrote:If you're eye dominance is close to the same between both eyes, then you will have to train your brain to recognize which of the two images is the correct one to use.

Whether iron sights or scoped, rifle or handgun, I shoot with both eyes open. If the sight picture is correct, it doesn't matter which image you use. Pool and billiard players have related aiming issues, and quite a number of them, e.g., shoot right handed but use their left eye (or both) for aiming. When shooting right handed or a handgun with both hands, I use the right eye image, because that's how my body aligns comfortably. When shooting left handed, I use the left image for the same reason.