OLD school?... just Old Eyes my friend... and bifocals on a bike really suck, very dangerous...
I have some really nice "sunglass/safety glasses" with a small Bi-focal spot on the bottom, but man, they make your eyes get very tired after a couple hours.. to much "re-focus" time..
about 12 years ago, I got some "mini" glasses, and tried to wear them on a 3 hour ride, just reading type magnifiers.. worn down on my nose, as I don't need glasses to drive, just read at arms length..
Bright sunny day, and after 2 hours of riding, and the glare off the plastic on my tank bag map holder.. it felt like I was arc welding without goggles.. man, that was painful.. got sunburned eyeballs..
Now, when I use that map holder, I slip a "dark" nylon stocking over the bag, and it cuts the glare, but still allows perfect vision on the maps or scribbled "routing sheets" I have in there.. cheap solution, cost like $0.50 at a Goodwill store, for a pair...
just have to add, while I was searching for the remote, I was talking to wife, about doing this whole switch over.. and when she told me just how much she paid for my Garmin SP2610... I freaked.. she said that package she bought for me, (It had just come out, back around then, '04 iirc, ) cost her $1,000...... wow. times have changed. Oh, she can't read the screen either, and uses her Tablet with connectivity for a navigator in the truck.. the phone is too small for her also..