Dr. Silva Néto is a neurologist and a headache specialist who has dedicated himself to the study of headaches for 25 years. He has doctorate and postdoctoral degrees in neurology; the theses for both were on headaches. He is a translator of the International Classification of Headache Disorders, Third Edition (ICHD-3) into Portuguese, authorized by the International Headache Society (IHS). He has written eight books and published 99 scientific articles, including many on ocular pain.Kathleen B. Digre, MD, specializes in neuro-ophthalmology and headache and practices at the John A. Moran Eye Center, University of Utah, Salt Lake City. She evaluates and treats complex visual complaints which can be due to optic nerve or brain disease. Dr. Digre sees patients with complex neuro-ophthalmic disorders such as papilledema, photophobia, visual loss, and diplopia. She also treats migraine headaches and other unusual headache disorders. She is listed in Best Doctors in America.