For years, military sharpshooting instructors taught their students to close their non-dominant eye as a fundamental of shooting. The idea behind this practice is to lower the activity of the half of the brain that isn’t technically being used, freeing it from distractions.
Over the years, well-practiced shooters have determined that closing one eye helps you line up your target more easily. So, why keep both eyes open?
Former Army Green Beret Karl Erickson will break down for you.
Green Beret Karl Erickson spent 25 years proudly serving in the military.
When a hectic situation arises, and you need to draw your weapon, you’re going to experience physical and physiological changes. Most noticeably, the gun operator’s adrenaline will kick up, prompting the “fight or flight” response.
During this response, the body’s sympathetic nervous system releases norepinephrine and adrenaline from the adrenal glands, which are located right above your kidneys, as shown in the picture below.
Once these naturally produced chemicals surge through your bloodstream, your heart rate increases and your eyes dilate and widen.