My eyes aren't all that bad, just a little far-sighted, so I don't have any trouble seeing both the gun sights and the target. However, my wife wears bifocals, and has some trouble aiming. She can see the gun sights using the bottom part of her glasses, but can't see the target well enough to aim. When she uses the top part of her glasses she can see the target but the gun sights are very, very blurry, too much so to get them lined up. Can anybody offer some advice or techniques for aiming using bifocal lenses?