Optics is an essential part of ophthalmology, and this handbook presents a comprehensive guide to the subject for students in the field. The book covers topics such as refraction, binocular vision, and ocular motility, with detailed explanations and helpful diagrams. A valuable resource for any student of ophthalmology. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.