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Article
March 1967

Electronystagmographical Study of Latent Ocular Nystagmus

Author Affiliations

Iowa City, Iowa
From the Department of Otolaryngology and Maxillofacial Surgery (Dr. Milojevic) and the Department of Ophthalmology, College of Medicine, University of Iowa, Iowa City. Dr. Windsor held an NIH Special Fellowship.

Arch Otolaryngol. 1967;85(3):283-286. doi:10.1001/archotol.1967.00760040285009
Abstract

SPONTANEOUS nystagmus may be resulting from the disturbances of (a) vestibular mechanisms (peripheral and central vestibular apparatus) (vestibular nystagmus), (b) gaze mechanisms; moving the eyes eccentrically from midposition (gaze nystagmus), and (c) fixation mechanisms (fixation nystagmus). Latent ocular nystagmus belongs to the fixation nystagmus group. It is the phenomenon of binocular nystagmus with monocular occlusion and is always in the direction of the uncovered eye. This was described by Fancon (1872).1 Kestenbaum (1921)2 pointed out that there may be a superimposed gaze nystagmus over a latent nystagmus. Gaze nystagmus would augment or inhibit the latent nystagmus depending on whether the uncovered eye is in an adducted or abducted position. He was of the opinion that latent nystagmus resulted from the difference in sharpness of the images on the two maculas, and suggested the term "unimacular nystagmus."3

According to Jung and Kornhuber (1964)4 latent ocular nystagmus is

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