Ever since I read about opaque contact lenses I have had a sneaking interest in such methods of developing dependency and thus control. And then I came across this image, albeit with a different (although related) caption, and my imagination became instantly fired up. Nothing much to do with the plot of the new book, but don't fret; work is still progressing well on that front.
I may well add more to this posting as the day progresses. It all depends on where I go, if I take my notebook computer and whether any new ideas pop up in my head. There are all sorts of stuff bubbling under in my head inspired by this picture, but at present I don't seem able to formulate these ideas in terms of the written word.