The Practice of Refraction

THE purpose of this book is to present in a manner suitable for the student and the practitioner the essential principles of the theory and practice of the correction of defects in the optical system of the eyes and their associated muscles. A simple and essentially non-mathematical form of presentation has therefore been adopted, wherein all that is necessary for the clinical practice of refraction is described and explained without burdening the reader with innumerable mathematical proofs. The book is thus clinical rather than theoretical, and its object is essentially practical and, while theoretical matters are dealt with sufficiently to make their application to practical problems understandable, no attempt has been made to enter into the mathematical foundations of the subject.