When I made the switch from regular one-distance lenses to bifocals, I tried those no-line bifocals. They seemed like a good idea, and they ended up with a smallish mid-range zone that was good. But I seemed to always be bobbing my head around trying to find the right part of the glasses to look through, and they were horrible when trying to use the viewfinder on a camera. This year I canned the no-lines and got regular bifocals, and after a brief period of adjustment, I like them much better. The top half I can see out of much better (no lines are weird--they only grind a small part of the lens right in front of the pupil in the middle of the lens, so you have to turn your whole head to see, not just move your eyes in that direction). I have a pair of computer or office glasses that are no-line and have only the mid-range and closeup lenses and are perfect for computer work. I don't crane my neck trying to look at the screen.

SRS