You need "occupational bifocals". I've had them for years and work well.
Occupational Bifocals and Trifocals for Presbyopia - AllAboutVision.com
The top and bottom bits are the same, for reading (and overhead panels) and the middle bit for distance.
These are not individual bits of glass stuck together; the three sections are machined out of the same piece. The price isn't too bad either.