Bifocals

(7/10/2008 Update: See this post for my update on split-focusing screens and what I purchased.)

I recently had to switch to bifocals (those graduated variable kind), and I frankly feel that I cannot focus the camera accurately. It's almost as if I am focusing a tad behind the object. I've messed around with that diopter setting long enough; I am going to check into the split focusing screen.