EyePalA(R) Master Kit aids shooters by focusing their sight on the target picture and nothing else. EyePalA(R) is made from static cling material and sticks to the surface of any shooting glasses, prescription glasses, or other outdoors eyewear. Eyepals work with Red Dots and really shine when helping you sharpen in the target with iron sights. Rifle aperture - Silver print with smaller aperture is in the RIGHT<