Training your eyes to see a "straight line" can provide a huge boost to your putting, especially if you feel uncomfortable over the ball. More specifically, it can greatly improve your start line and allow you to make a flowing stroke without manipulation. Ultimately, golfers may need to re-calibrate their eyes several times over the course of a season, depending on any bad habits they pick-up. Thankfully, to do this, all you need is an alignment stick and the diligence to run through (5) visual calibration tests.