Well, I don't, but at least there's no uncomfortable glare here any more. Thank you to the system which can take with one hand and then give with the other so you almost feel grateful for returning to a zero-state.
Now I have one further problem to deal with. The new glasses, which seem to have been manufactured to make my world look totally non-rectangular. Yes. Now I've acquired some sort of weird astigmatism. Let's blame everyone but me. Maybe I should have given different answers during my eye test. I have to rush back to Reading after work tonight in order to give them the chance to put this all right. I know that I can't spend much longer constantly taking my glasses off to see whether the floor is really sloping up and to the right (it's not).
It freaks me out.
Still, once my eyes are sorted out, maybe the world will look like a better place.