Functional hemianopsia: a historical perspective

The controversial history of functional hemianopsia is reviewed from Briquet's 1859 monograph on 430 cases of hysteria, through the 19th century works of Charcot, Freud, and Janet, and the observations of Fox and Wilbrand and Saenger in the early 20th century. More recently, concepts of this entity have been clarified by modern binocular testing of visual fields.