Eye Dominance

Eye dominance describes how the brain favors input from one eye, called the master eye, when fusing what both eyes see into a single aiming picture. You can find your dominant eye with a simple test: form a small opening with both hands, frame a distant object through it, then close one eye at a time and note which view keeps the object centered. A shooter whose dominant eye matches the shoulder they shoot from will line up behind the optic more naturally.

When dominance does not match the shooting side, the sight picture can feel off and the shooter may struggle to find a clean view through the scope. Cross-dominance is workable with practice, by closing or lightly occluding the dominant eye, or by adjusting head position within the eye relief window. The mismatch shows up just as plainly with iron sights, where the front post can appear to drift off the target.