<unk>  is a visual disturbance in which objects in the visual field appear to oscillate. The severity of the effect may range from a mild blurring to rapid and periodic jumping.<unk>  is an incapacitating condition experienced by many patients with neurological disorders. It may be the result of ocular instability occurring after the oculomotor system is affected, no longer holding images steady on the retina. A change in the magnitude of the vestibulo-ocular reflex due to vestibular disease can also lead to<unk>  during rapid head movements.<unk>  may also be caused by involuntary eye movements such as nystagmus, or impaired coordination in the visual cortex (especially due to toxins) and is one of the symptoms of superior canal dehiscence syndrome. Sufferers may experience dizziness and nausea.<unk>  can also be used as a quantitative test to document aminoglycoside toxicity. Permanent<unk>  can arise from an impairment of the ocular system that serves to maintain ocular stability. Paroxysmal<unk>  can be due to an abnormal hyperactivity in the peripheral ocular or vestibular system. __TOC__
Oscillopsia
Carotidynia
Illusory palinopsia
Akinetopsia
Paresthesia
Ocular tremor
Cerebral polyopia
Cyanopsia