Just re-read through this post, looking for tips on buying Varifocal spex. and thought I'd comment as per the original invitation. Since my eye-sight started to deteriorate, due to age, I've:
1. started to use a pair of spex. with a prescription for driving, which work really well - they stay in the car.
2. I splashed out on a pair of second-hand Algha frames, and had them fitted with my own prescription reading glasses. I imagine the frames will last me some years... periodically replacing the lenses. https://savileroweyewear.com/
3. I am now about to dip a toe into sourcing varifocal lenses in frames suitable for cycling... I'm OK with distance during daylight, but figure that, as I need lenses to read the GPS, I might as well have the facility to see distance better in the same frame
. I have used Volt safety spex (very cheap) to try out the idea of eye-wear with a small reading area, to see if it lines up with my GPS properly, which it does!
In summary, needing a variety
of eye wear, to adapt to losing visual capacity is Right Royal Pain, but I keep reminding myself that I enjoyed 20/20 vision for decades and some of my chums have had to wear glasses since they were children! And there are solutions... if the varifocals work, at least I'll be back to enjoying a Good View as well as being able to read the map. Certainly, having an expensive GPS and not being able to read it properly is verging on pointless, as well as, occasionally, leading to making Good, Old-Fashioned errors in navigation, which considering the accuracy of the GPS, is down-right ridiculous! The old adage of map reading was Always Know Where You Are, which (batteries allowing) the GPS is immune to, so to have to admit that you got lost 'cos you can't see the screen properly is embarrassing.