The decision whether a nystagmus is congenital or acquired may be difficult and is of importance in patients presenting with neurological complaints. In this article, established diagnostic criteria are critically reviewed with particular emphasis on types of nystagmus waveform and their relationship to pursuit and optokinetic responses. Attention is drawn to certain acquired nystagmus which ma...

An overview of possible treatment options for oculomotor disorders that prevent clear vision is given. Downbeat nystagmus, upbeat nystagmus, seesaw nystagmus, periodic alternating nystagmus, acquired pendular nystagmus, and saccadic oscillations such as opsoclonus/ocular flutter are discussed. In addition, superior oblique myokymia and vestibular paroxysmia are reviewed. All treatment recommend...

To the Editors: Children with Down syndrome reportedly have a high prevalence of nystagmus.1-3 The etiology of nystagmus in Down syndrome has been presumed to be idiopathic, although evidence for this is limited. Whether cerebellar hypoplasia, a common magnetic resonance imaging (MRI) finding in Down syndrome, contributes to nystagmus has been investigated recently because of the role of the ce...

PURPOSE We aimed to define the characteristics of epileptic nystagmus and correlate those with other clinical findings in a large number of patients. METHODS We report a patient with epileptic nystagmus and additionally reviewed the reported clinical features of 36 more patients through a systematic literature search. We analyzed the characteristics of epileptic nystagmus and attempted correl...

We studied three patients with spontaneous mesencephalic hemorrhages. All presented with some degree of impaired consciousness and abnormal ocular movements. One patient had a convergence-retraction nystagmus with a unilateral hemorrhage confined to the dorsal midbrain. Another patient showed left third nerve palsy due to a unilateral hemorrhage that involved ventral midbrain. The third patient...

Opsoclonus is defined as non-rhythmic, involuntary, spontaneous, multidirectional, and hyperkinetic eye movements, with a large amplitude and high frequency (10--15 Hz). These movements are present during visual fixation and convergence, and remain active during sleep and when the eyelids are closed. They should not be confused with an acquired nystagmus, which is usually unidirectional, with f...

The 38-year period of human space exploration has gained for us a lot of experience in the problem of space motion sickness. The authors collected some causes of space sickness from the literature and from their research results. We collaborated with the Soviet-Russian space researchers and elaborated those vestibular research methods that were carried out by human space missions in the Soviet-...

purpose: to determine the effect of horizontal recti surgery on visual acuity and head posture and electronystagmographic indices in patients with congenital nystagmus. methods: this prospective comparative case series was conducted on 58 patients with congenital nystagmus who were referred to our clinic over three years. patients were divided into three groups: the first group (29 cases) had h...

Nystagmus is a periodic, involuntary eye condition. It is characterized by the smooth pursuit of the eye away from the target location followed by a quick saccade back to the target location. Nystagmus is also called “dancing eyes” as the eye movements appear pendular or jerky to an observer. Everyone has nystagmus. Trying to fixate on objects far in your periphery will produce nystagmus-like m...