I have never been able to shoot with both eyes wide open. I always squint my left eye. I have tried both eyes wide open and always gave up because the sights or target would switch back and forth or side to side. Today I have been working with a laser cartridge by Laser Ammo called SureStrike in my LCP. Using it a few minutes at a time several times today, I can now "shoot" a 1" doorknob 15' away consistently with both eyes open. Earlier, I was getting a headache, so I did it in shorter sessions and it is working. I really like this thing, and REALLY like keeping both eyes open, not squinting, and for some reason, feel more relaxed with both eyes open.