@jonathanhogg Welcome to the club. Until recently I only needed my second pair for playing the piano, but now I use them a lot on the computer as well. If you count my very short-sighted uncorrected vision which I often use when working on electronics I guess I effectively have three levels of correction to choose from.

@alphabetter It was the taking-my-glasses-off-to-solder that was driving me mad! Since I can't see more than a few centimetres, I'd have to put them back on again immediately. So I now have a bench pair that does laptop-screen to right-in-front-of-my-face.