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Grating contrast detection perimetry in a patient with occipital lobe epilepsy

Division of Electroencephalography and Clinical Neurophysiology, Department of Laboratory Medicine: and the Division of Neurology, Department of Medicine, University of Washington, Seattle, Washington.

A new perimetry technique is based upon detection of faint gratings. This method permits assessment of visual field abnormalities that are not detectable by Goldmann perimetry or tangent screen examination. These abnormalities occurred in a 57-year-old man with a seizure disorder of left oicipital origin. The technique may have advantages over conventional field study methods for the early detection of geniculocalcarine pathology.

Requests for reprints should be addressed t.o Dr. Soso at the Division of Electroencephalography and Clinical Neurophysiology, NN 283 University Hospital, SB-10, Seattle, WA 98195.

This work was supported in part by grants NINCDS NS 11563-01, NIH Clinical Research Center Grant RR-37, and a grant from the Epilepsy Foundation of America.

Accepted for publication April 14, 1977.