Lance Jensen
FBI
Your eye muscles are weak and untrained. Do some focus drills throughout the day. Our eyes are naturally not use to hard focusing. In everyday life we use a soft focus to find an object, then find a specific point. For example if I asked for the time, you would use soft focus to find the clock on the wall, then hard focus to find the hands. In shooting we must use our hard vision very quickly. If I asked for the time, your peripheral vision would locate the clock and your eyes would immediately hard focus on the number next to the big hand. You can train your eyes to do this by finding two specific points near and far. Work holding your vision on one point for a few seconds then move your eyes to second point. Make yourself use hard focus. After a few weeks you should begin to see a noticeable difference in what you see while shooting.