Thank you Jen, for your comforting message. At present Cleo seems to still look around and has no trouble negotiating anything, so it's very early stages, if it is indeed happening, and in that way she will adapt. I guess it would be much harder, like it would for people, if it was sudden complete loss of sight. Anyway I'll let you know what happens next Friday (9th).

By the way folks, thyroid test was in the high end of normal range, 46, the range being 40-48. So that was good. The vet and all the nurses say she is doing really, really well. Oh- and here she comes now to see what I'm up to!

Thanks, all.