In this book, American ophthalmologist and researcher Dr. Bates teaches how to proactively maintain normal vision well into old age and how those with visual impairments can playfully regain it. His method focuses on reactivating the collaboration between the eye and the brain. This results in a vision technique that can be practiced effortlessly and enjoyably, as it is based entirely on natural prerequisites. Particularly, the methods developed by Dr. Bates for dark recovery and strengthening the eyes through eye exercises are easy for anyone to understand. To support the vision exercises, the book includes a three-part vision chart.