As far as baseball hitting aids go, the HyperFocus Helmet is perhaps the simplest and easiest to use.
The patented design helps hitters improve automatically by limiting their peripheral vision - deceptively simple and very effective. With reduced peripheral vision, hitters are forced to move their heads as they track the baseball to the contact point.
With the HyperFocus Helmet on, you have no choice but to keep your eye on the ball.
With consistent use during batting practice, hitting drills and tee work, the HyperFocus Helmet helps players develop the muscle memory and mechanics to perform consistently in games.
Below is an older video produced when we were going through the patent process. It show the older version of the helmet, but the explanation is still good.