Quick Personal Observation: Eyeglasses are an extremely personal choice. Vitally important for pilots and one simply has to TRY some to know what works best for YOU. Any GOOD optician will remake if you are not satisfied, BUT, you do have to invest a little time to give them a fair trial.
If seen more than one pilot using what amount to TRIFOCALS while flying: The TOP most section is a small area for close viewing the overhead panel, mid section for distant vision and another small lower section (same or different Rx as the top) for maps and reading text. They do look a little funny, but the DO work. For obvious reasons, some electricians also use this style. You can HELP your option/optometrist by premeasuring some distances: Bridge of nose to OH panel and bridge to your usual text/chart reading distance. Get some help from a colleague or spouse to make the measurements. The idea may sound/look a little strange, but the configuration works if you get the measurements and degree of correction correct. Standard bifocals are probably better for normal use and for driving. I'm told that progressives can also be made this way, but personally, I've had horrible luck with the type, even for standard, everyday use. Good luck and please be sure to tell your providers about your work, what you need and ask a lot of questions. You WILL get there! -NFZ