This practical manual reviews historical concepts, contemporary research, and diagnostic techniques for functional visual disorders. Functional Ophthalmic Disorders: Ocular Malingering and Visual Hysteria is a how-to manual that is written for the practicing ophthalmologist and optometrist, complete with color photos that allow the reader to see pictures of select conditions and diagnostic testing. In addition to the photos, videos are provided online to illustrate simulated testing and results on a mock patient to assist in the differential diagnosis. Written and edited by leaders in the field, the topics include the history and characteristics of functional disorders, the differential diagnosis of ocular malingering and hysteria, and practical testing in an ophthalmologic examination to distinguish the conditions from organic disease.