Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Most of the book is useless marginal information

As I said in the title, about 70% of the book just pumps you up, by either telling you that this book is awesome and hyping up the exercises, or repeating the same useless info relative to improving eyesight, it seems like the book was originally 10 pages and they had to come up with 90 something pages of empty talk.Most of the exercises they teach are related to stretching the muscles of your eyes, these exercises can be found free of charge online. feels like the authors just gave a brand name to a set of exercises that consist of eye rolling and alternating looking at your nose and far away.if you really want something ground breaking and that has been around for a long time, get dr. bates classical work, I myself bought "relearning to see" by Thomas Quackenbush, which is a remastered classical Dr. Bates, I do recommend instead of this one for sure.