I have progressives in my regular glasses. It took a couple of rides to get used to my stick-on bifocals. Now I don't notice them at all. It's interesting how completely the mind adapts to things like bifocals.
I had old single vision inserts. The optician told me that +2 readers would go with them. So I got a
stick-on bifocal, and
cut one in half and trimmed them down with a razor knife. The plastic is too dense to cut easily with scissors.
These stick-ons work great. They adhere like a window static cling sticker, but I can even wash the inserts under the faucet and they don't come off.
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The stick-on is about the size of my index fingernail. It covers the whole width of my handlebars. I tried a few different locations, and kept trimming it down until I settled on this.
These are Rudy Project Rydons. I have clear lenses and dark sunglass lenses that snap in. The inserts have a metal frame, and the bridge is springy, and clicks into a slot in the frame.
I'm due for a new prescription, and I hope to duplicate this arrangement.