I'm reading this book. It was requested by Chela, and because I 've always found Sacks' books books fascinating, I borrowed it from the library. Unforunately, I no longer scan except for missing pages occasionally. It is, as are all his books, interesting. Of particular interest, I think, to you who are blind or have blind relatives and friends, is the chapter I'm reading now: To See and Not See. It's about a man who, after being blind because of heavy cataracts for most of his 50 years, had them removed. The chapter also refers to previous cases in the literature. It brings out the relationship of sight to the brain, not just the eyes. Perhaps some of you have had or know someone who has had a similar experience. Even a 22-year-old man who had his vision restored after having been blind since childhood had problems. Apparently because the sense of space is learned through visual experience, it is difficult to adjust when one suddenly has vision restored. And colors were a wonderful but confusing experience. And recognizing a whole object, such as a dog or cat, which the person had known only by touch.Putting all the different parts together. It's a fascinating chapter, at least to me. As are they all. I seem to remember reading once that deaf people who suddenly are able to a hear fter an operation also have difficulty adjusting, and that some don't want to have an operation to restore hearing for that reason.