Here's the geeky/techie thing again: As to those variable-no-line lenses, you can pick where the progressive zone starts, how high up the lens. This should be set for your neck comfort for the "sweet spot" for reading and the "sweet spot" for long distance based on how the frames sit on your face, if you look at a desktop computer screen Vs mostly on-the-desk paperwork.
And the little manufacturer's marks tell you who makes the lens you like, so you can get that brand again. One brand's variable range may run the sweet spots horizontally and another manufacturer runs theirs vertically.
Of course, you can avoid the reading-glasses thing when you ride, just buy some self-sticky Fresnel lens stuff and cut it to fit over your fuel gauge or speedo or map pouch or whatever it is you can't quite read, that will magnify it for you.
I like riding in contacts because my glasses bounce one way while the head is bouncing the other, and you compound a bad image when you add eyeglasses, faceshield and windshield distortion.
And the little manufacturer's marks tell you who makes the lens you like, so you can get that brand again. One brand's variable range may run the sweet spots horizontally and another manufacturer runs theirs vertically.
Of course, you can avoid the reading-glasses thing when you ride, just buy some self-sticky Fresnel lens stuff and cut it to fit over your fuel gauge or speedo or map pouch or whatever it is you can't quite read, that will magnify it for you.
I like riding in contacts because my glasses bounce one way while the head is bouncing the other, and you compound a bad image when you add eyeglasses, faceshield and windshield distortion.