However, unless you're in your teens or 20s, there's another problem with sight alignment. When we're young, our eyes rapidly shift focus from rear sight to front sight, to the target and back again, so that all three seem to be in sharp focus. By our 30s, we begin to lose this ability to speed-focus. As a result, the sights or the targets begin to look blurry. Most of us instinctively look hardest at what we want to hit. This leads to misses because the sights get blurry and we can't refine alignment. Thus, as we get older and can't focus clearly on all three elements of the sight picture, the Golden Rule (for the Golden Age) is to concentrate your focus on the front sight. This goes for rifles with open sights as well as for handguns.