I got turned onto this book in graduate school, but never got around to reading it until now. But having read it, I'd have to say it's a fascinating book about vision and the cognitive functions of the brain that help people construct what they see. The author also briefly discusses the sense of touch and how it constructs reality, but the main focus is on vision.
What I really liked was the explanation behind optical illusions. I didn't agree with everything the author wrote, because I found with some of the exercises that my experiences differed from his. Yet what this book does show is that what we see isn't always he objective reality we'd like it to be...in fact rarely, at least through our senses, is reality objective.
If there's one complaint I had, it was that he purposely chose to leave out the citations. Granted he drew on a lot of work, but it'd be nice to trace his sources and the context of those sources. That said I highly recommend this book to anyone interested in how our senses help us construct reality.