NYSTAGMOID MOVEMENTS AND VISUAL PERCEPTION

Abstract

IN A previous communication one of us (M. B. B.) reported 4 cases of monocular diplopia and polyopia in patients with disease of the brain.¹ Although each case presented a different clinical and pathologic problem, there were certain features which all had in common: The double or multiple vision was most pronounced on prolonged or close fixation. Two of the patients, who were studied in detail during the period when the illusions were manifest, complained of multiple image formation only after prolonged fixation on an object. Furthermore, the diplopia and polyopia seemed to be confined to the macular field of vision. Since the act of close fixation is usually associated with an increase in ocular movements, it was felt that the latter might in some way be related to the phenomenon of monocular diplopia and polyopia. Kubie and Beckmann² found that increased ocular movements resulted in diplopia (presumably