Purpose Most individuals with infantile nystagmus (IN) have an idiosyncratic gaze angle at which their nystagmus intensity is minimized. Some adopt an abnormal head posture to use this "null zone," and it has therefore long been assumed that this provides people with nystagmus with improved visual acuity (VA). However, recent studies suggest that improving the nystagmus waveform could have litt...

Despite incessant to and fro motion of their eyes, persons with congenital nystagmus rarely report illusory motion of the visual world (oscillopsia). To determine whether insensitivity to retinal image motion prevents oscillopsia, thresholds for detecting horizontal and vertical oscillatory motion of a luminous dot target were measured in subjects with congenital idiopathic nystagmus and compar...

Benign paroxysmal positional vertigo (BPPV) is one of the most common causes of recurrent vertigo and is characterized by transient vertigo and nystagmus elicited by change of head position. Direction-changing positional nystagmus (DCPN) is typically observed upon head turning to either side in supine position in patients with horizontal canal (HC) BPPV. The geotropic nystagmus of HC canalolith...

Aim: To critically evaluate the literature in order to explore the success of botulinum toxin and extraocular muscle surgery in the management of acquired nystagmus. Methods: A literature search was undertaken using the PubMed and Web of Knowledge databases. Only studies reported in English were included. Results: The aim of using botulinum toxin is to alleviate the symptoms induced by acquired...

INTRODUCTION The aim of this study was to assess the effectiveness of displacement surgery in damping of ocular oscillation and management of compensatory head posture in patients of congenital nystagmus. METHODS This study was carried out in 2014. The participants were 50 patients with congenital nystagmus that dampens in a certain direction of gaze with or without abnormal head posture and ...

UNLABELLED The effects of Epley's maneuver in benign paroxysmal positional vertigo (BPPV) associated with Menière's disease are controversial. AIMS To evaluate the progression of positional vertigo and nystagmus after one or more of Epley's maneuvers in BPPV associated with Menière's disease, and the recurrence of BPPV. METHOD a retrospective study of 62 patients with BPPV associated with M...

Epileptic nystagmus (EN) is a quick, repetitive jerky movement of the eyeball caused by seizure activity, unaccompanied by other ictal phenomena rare. Here, we described two cases, one characterized by binocular and the other by monocular isolated epileptic nystagmus (IEN), and we identified the characteristics of the etiology, clinical manifestations, electroencephalogram, imaging, treatment a...

The natural viewing behavior of moving observers ideally requires target-selecting saccades to be coordinated with automatic gaze-stabilizing eye movements such as optokinetic nystagmus. However, it is unknown whether saccade plans can compensate for reflexive movement of the eye during the variable saccade latency period, and it is unclear whether reflexive nystagmus is even accompanied by ext...

BACKGROUND Pendular nystagmus commonly occurs in congenital and acquired disorders of myelin. OBJECTIVE To characterize the nystagmus in 3 siblings with an infantile form of an autosomal recessive peroxisomal assembly disorder causing leukodystrophy. DESIGN We examined visual function and measured eye movements using infrared oculography. We noted changes in eye speed and frequency before a...

We injected botulinum toxin into the horizontal rectus muscles of the right eyes of 2 patients who had acquired pendular nystagmus with horizontal, vertical, and torsional components. This treatment successfully abolished the horizontal component of the nystagmus in the injected eye in both patients for approximately 2 months. Both patients showed a small but measurable improvement of vision in...