Author: Glossary
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Opticokinetic nystagmus
A rhythmic jerk nystagmus occurring when one is looking at constantly moving objects (e.g., viewing telephone poles from a moving car or train).
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Miner’s nystagmus
Nystagmus occurring in those who work in comparative darkness for long periods. A condition observed in coal miners where the eyes continuously move.
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Labyrinthine nystagmus
Nystagmus due to disease of the labyrinthine vestibular apparatus. Nystagmus observed in labyrinth disorders.
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Gaze evoked nystagmus
Nystagmus upon holding the eyes in an eccentric position. It is due to dysfunction of the brainstem, or it may be caused by drugs such as sedatives or anticonvulsants. The direction of the nystagmus may change when the individual is fatigued or returns fixation to the primary position. This is called rebound nystagmus.
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Fixation nystagmus
Nystagmus that occurs only when the eyes gaze at an object.
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End position nystagmus
Nystagmus that occurs when eyes are turned to extreme positions. It may occur normally in debilitation or fatigue, or it may be due to pathology of the subcortical centers for conjugate gaze.
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Convergence nystagmus
Slow abduction of eyes followed by rapid adduction.
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Cheyne’s nystagmus
Rhythmic nystagmus that resembles the rhythm of Cheyne-Stokes breathing.
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Aural nystagmus
Nystagmus due to a disorder in the labyrinth of the ear. Eye movement is spasmodic.
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Nystagmograph
An apparatus for recording the oscillations of the eyeball in nystagmus.