During the LPGA Michelob Ultra Open broadcast, Judy Rankin reminded viewers that Suzann Pettersen sometimes putted with her eyes closed last season (Pettersen is apparently no longer using this trick). And Andy North jumped in to say that during one of his PGA Tour seasons, he spent several weeks putting with his left eye closed. "It took the hole out of view and forced me to focus only on the ball," North said.

We talked about Pettersen's eyes-closed trick last year when it was first revealed that she was doing it. Check out the article, "Why pro golfers sometimes putt without looking at the ball."

See also these drills and quick tips:

• Close your eyes for this putting drill
• Another eyes-closed putting routine
• A full-swing "eyes closed" practice techique