I expected shopping for glasses to be a nightmare, for the same reason finding a decent pair of cycling sunglasses had been a nightmare. But I underestimated modern technology and our neightbourhood's offering of optical shops. Picking up friends' glasses in the past, I remember them being heavy. But apparently eyeglasses today can be made extremely lightweight - with high-tech plastic and titanium frames. There is also enormous variety in shapes and sizes. I had no problem finding some that fit my face and weighed next to nothing.
With cycling in mind, I got a pair with plastic frames and photochromic lenses. They cover a good part of my face, and the lenses turn dark in the sun, but clear at night. I have already worn them on a couple of rides and the fit is very comfortable. But wearing corrective lenses will take some getting used to! Everything in the distance now looks unnaturally sharp, or hyper-3-D. My feel for how close or far away objects are is a little disturbed by this, but I am assuming my brain will adjust eventually.
Another thing that's happening, is that while the glasses correct my far-away vision, they do so at the expense of making things blurry up close. On the bike, this means that I can't really see anything that's directly in front of me or at handlebar level (i.e. the cycling computer on my roadbike) unless I take them off or look underneath the lenses. I am still working out how to adapt to this. Meanwhile, it's a relief to see clearly at a distance again.