I have used the XDSolution the past two seasons and it has worked the best for me to prevent my left eye from becoming the dominate eye when moving to the target. In the past I have tried most options - one eye, a spot on glasses lens, covering the upper portion of glasses lens, stick on blinder at the end of the barrel, etc. I don't consider myself of All-American talent but during the last two seasons I have managed to shoot hundreds in singles events and a hundred in a handicap event (from 22 yds.). If you struggle with cross dominance issues you owe it to yourself to try the XDSolution - it may be the solution that works best for you.