When I make the front sight clear in my vision, the target is usually much too blurry. I'm just starting to learn and get serious about proper technique. Will my eyes learn to adjust for a better sight picture? I used to shoot with one eye closed and focus on the target. Now I'm using both open and crystal clear front sight. What do you guys do? Also, where do you guys put your shooting hand thumb on the Glock? I find I can't point it at the target or I'll be on the slide lock, so I just let it rest, sort of pointing up and out.