A reprint, completely revised and reset, with some technical material eliminated and new diagram instructions for home treatment for the layman included. A test chart for the exercises recommended is tipped into the back cover. The book marked a revolutionary change in the approach to eye problems twenty years ago, and is still news to many. Dr. Hates' theory rests on the conviction that most eye troubles are functional muscular derangements, closely linked with lack of mental relaxation, and that correction can be achieved by mental control, exercises, recognition of the value of imagination, memory, and the destruction of illusions. In new form available at lowered price.