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KMID : 1036520130030020103
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Clinical Neuro-Ophthalmology
2013 Volume.3 No. 2 p.103 ~ p.106
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Oscillopsia
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Choi Kwang-Dong
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Abstract
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Oscillopsia is an illusion of an unstable vision, made up of the perception of to-and-fro movement of the environment. It is associated with poor visual acuity, and is a disabling and distressing condition reported by numerous patients with neurological disorders. The notion of oscillopsia refers to the interaction between the physiological mechanisms resulting in movements of the eyes and those keeping a stable visual perception. Eye instability may be observed in two main conditions: impairment of an ocular motor system that serves to maintain ocular stability including the fixation system, the visuo-vestibular stabilizing system, and the neural integrator leading to permanent oscillopsia, or abnormal hyperactivity in the peripheral ocular motor or vestibular system leading to paroxysmal oscillopsia such as superior oblique myokymia and superior canal dehiscence.
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KEYWORD
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Oscillopsia, Fixation, Visuo-vestibular stabilizing system, Neural integrator
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