The probable best result (my guess) would be two pairs of glasses -- one set for work distances, and another set for 'normal' uses.
I'm in my mid-40s, but just as I crossed 40 I found I had to start looking over my regular lenses to read tiny print. I also found that if I didn't get away from the screen at least once an hour, I'd start getting eyestrain and headaches. I knew what was next.
My prescription is about -5 diopters. I've got a set of prescription lenses at about -3.5, with a slightly smaller PD (pupil distance) since your eyes narrow as you look closer. The nice optometrist gave me my full prescription written down, including the PD, and I was able to mail order new glasses - with nice frames - for about $30. I can use these at the screens all day without any fatigue.
I've got a set of bifocals as well, but my current manufacturer only does those in regular index plastic, so those are pretty thick. My single-vision lenses are pretty thin, however.