As is well known, the majority of lateral homonymous visual defects are of the hemianopic variety, while the quadrantanopic types are less often seen. In general the defects consist of a single large uniform scotoma extending over one or two quadrants on one side of the vertical meridian. They not infrequently spare the central field of vision and invariably implicate the peripheral parts.
Homonymous central or paracentral scotomas have been reported from time to time,1 but multiple scotomas in homonymous fields are extremely rare. In reviewing the literature, Wilbrand and Saenger2 cited several isolated instances of irregular and multiple field defects occurring in patients with gunshot wounds of the occipital lobe cortex and the adjacent optic radiations. In a large series of cases of tumors involving the geniculocalcarine pathways in which careful tangent screen and perimetric studies were made, isolated discrete scotomas were never found.3