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.

Do you keep both eyes open when sniping?

Hunters often learn from a young age to shoot with one eye closed. ... Elite snipers shoot with both eyes open. In addition, ample evidence shows that both-eyes-open shooting is simply more effective.

Should you close one eye when playing pool?

You should nip the one eye thing in the bud early. It will eventually hinder consistency in your ball making. It effects your depth perception.