Yippee Brands Eye It Up Visual Putting Alignment Tool;

Eye It Up is an easy way to mark your ball to improve putting setup and make more putts. Featuring the Patent Pending, Eye Alignment Ring you simply draw the 3 guidelines on your ball with the marker. When you stand over the ball, if you see only the front ring, your eyes are too far forward. If you only see the back ring, your eyes are too far back. When you see both rings you are in the perfect putting position. Once in proper position, use the straight directional line to aim your putt to toward the hole, make a smooth stroke and sink the putt.