Originally Posted by
Karma13
I've got extremely strong progressive lenses, and no doubt at all, they slow me down. Not a lot, but discernibly. The ground wavers, and I constantly put my feet /almost/ where the ground is.
My prescription is so extreme (with some other issues as well), that I couldn't afford another pair of custom lenses, although I've considered it. But I like being able to switch from near to far vision quickly -- for instance, to look at a snake slithering off into the underbrush, or a butterfly, or doing a quick check for a tick on my arm. Having to whip out the other glasses, I'd miss that sort of thing, or it would become inconvenient. Also, I'd have to carry the extra glasses somewhere handy, which would be a minor logistical irritation. And a pair of bifocal progressives just for hiking would cost me a thousand bucks.