Optokinetic nystagmus ( OKN ) is nystagmus that occurs in response to a rotation movement.
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He called it " railway nystagmus . " Also called " optokinetic nystagmus . " It causes nausea and vomiting.
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The "'optokinetic nystagmus "'test is optional and involves asking the patient to look at a moving strip of horizontal lines.
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A simple but less-used technique is checking oculomotor responses with an optokinetic nystagmus drum, where the subject is placed inside the drum and surrounded by rotating black and white stripes.
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In addition to its role in maintaining smooth pursuit, the pretectum is activated during the optokinetic nystagmus in which the eye returns to a central, forward-facing position after an object it was following passes out of the field of vision.
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CT scans are relatively insensitive to the presence of cerebral lesions, so other neurological imaging such as EEG . In addition, motor visual function should be assessed through examination of pupillary reactions, ocular motility, optokinetic nystagmus, slit-lamp examination, visual field examination, visual acuity, stereo vision, bimicroscopic examination, and funduscopic examination.
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