Acquired Ocular Motility Disorders and Nystagmus
نویسنده
چکیده
Eye movement disorders may be considered in two categories: those that cause incomplete eye movements (ophthalmoparesis) and those that cause excessive eye movements (saccadic intrusions and nystagmus). Central to an understanding and correct diagnosis of abnormal eye movements is the evaluation of ocular alignment, ocular motility, and each functional class of eye movements: optokinetic, vestibular, vergence, smooth pursuit, and saccades. Ophthalmoparesis is caused by dysfunction of extraocular muscles, the neuromuscular junction, cranial nerves, cranial nerve nuclei, and internuclear and supranuclear connections. The initial pathologic eye movement in nystagmus is a slow drift of the eye away from the desired position, whereas the initial pathologic eye movement in saccadic intrusions is an inappropriate saccade that intrudes on fixation. Identification of the characteristics of nystagmus (physiologic versus pathologic, jerk versus pendular) is necessary for diagnostic evaluation and treatment.
منابع مشابه
Latent nystagmus and acquired pendular nystagmus masquerading as spasmus nutans.
SUMMARY We used ocular motility recordings to identify the characteristics of a rare combination of conjugate, horizontal jerk, and pendular nystagmus in a 9-year-old boy. The clinical diagnoses were amblyopia, left esotropia, congenital nystagmus, and an apparently uniocular pendular nystagmus that mimicked spasmus nutans. Ocular motility recordings revealed an unusual latent/manifest latent n...
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