Oh Chris... That's just a bit outdated that is...Do you think 2 pairs of belay glass would allow you to see into the past?
They seem pretty neutral for magnification, it's very much clarity. Less haze and sparkle from strong lights and crisper edges. Size wise, objects appear similar.
And I'm starting to worry that i'm struggling to see rock that's right in front of my face, for instance placing small wires right in front of you, or spotting small holds within a couple of feet of my nose.
I wear varifocals, biggest problem I have is spotting footholds.