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KMID : 0860920100120020127
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Journal of the Korean Association EMG-Electrodiagnostic Medicine
2010 Volume.12 No. 2 p.127 ~ p.131
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Indirect Traumatic Optic Neuropathy Induced Complete Visual Loss Following Closed Head Injury - A Case Report -
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Won Yu-Hui
Joo So-Young
Yu Su-Jin
Park Mi-Hee
Kim Yong-Wook
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Abstract
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Indirect traumatic optic neuropathy is defined as trauma-induced visual loss that occurs without external or internal ophthalmologic evidence of injury to the eyes or its nerve and it occurs 0.5-5 % after closed head injury. We report a case of a 43-year-old man with bilateral complete visual loss following closed head injury. On initial examination, he can not count finger and see objects clearly with minimal perception of the light. The orbito-facial computed tomography reveals bilateral optic nerve atrophies without evidence of direct trauma to the optic nerve. We perform visual evoked potential with flash stimulation and its result shows no response on both eyes. Further ophthalmologic evaluation discloses bilateral optic disc pallors induced by optic neuropathy. We present a case of indirect traumatic optic neuropathy folllowing closed head injury based on the clinical, radiological, ophthalmological and electrophysiologic findings with reviewing of some literatures.
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KEYWORD
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Indirect traumatic optic neuropathy, Closed head injury, Complete visual loss, Visual evoked potential
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