Oculomotor function in patients with Parkinson's disease.

That patients with Parkinson's disease may have abnormalities of oculomotor function is fairly well known by clinicians. Limitation of gaze, especially in the vertical plane, and inadequate convergence have been described previously (Krebs 1925; Bielschowsky 1935). The present report is of a systematic investigation of oculomotor dysfunction among patients with this disease to determine: (1) the frequency with which such abnormalities occur among these patients ; (2) the nature and severity of these defects ; (3) the electrooculographic (EOG) recording of "typical" patients; and (4) the effects of levodopa on oculomotor defects. A preliminary report of the results has already appeared (Corin, Elizan and Siegel 1970).