The Magnetic Target Shooting Aperture brings the front sight, rear sight and target into focus when shooting with iron sights. This will give a much better sight picture. A better sight picture will allow you to improve your accuracy. The Magnetic Target Shooting Aperture slides on the lens of your shooting glasses so you can position it in just the right place. Cost is $24.95 plus shipping. See more details and purchasing information at http://www.SeeBetterShootBetter.com.