Main Page | See live article | Alphabetical index The Man Who Mistook His Wife for a Hat is a book describing the case studies of some of Oliver Sacks' patients, the title describing the study of a man with visual agnosia. The latter case study is also the subject of an opera by Michael Nyman. This article is a stub. You can help Wikipedia by fixing it. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.