Dozens of books have been published on the Bates method of vision improvement, and like this one, some written 50 or more years ago have been reprinted due to the growing popularity of the method. Thousands of people have learned that the method does indeed work, and more and more eye doctors are waking up to that fact despite some long-held theories not being in agreement with it. The author, as of the original publication date (1955), had worked with over 2,800 people whose visual deficiencies ranged from nearsightedness and farsightedness to more serious problems such as glaucoma and cataracts. In the book she includes many modification to techniques that Dr. Bates established, to produce better results, and introducing variety to help eliminate boredom. She also introduces the use of color in exercises, not just black-and-white eye charts.