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  • Title: Binasal hemianopia.
    Author: Salinas-Garcia RF, Smith JL.
    Journal: Surg Neurol; 1978 Sep; 10(3):187-94. PubMed ID: 705607.
    Abstract:
    The visual fields of 100 patients referred for neuro-ophthalmologic examination were reviewed; eight cases had binasal visual field defects. Most clinicians have suspected an intracranial cause for such field defects since the classic report of Cushing and Walker in 1912. However, in this study, the cause for the binasal hemianopia was found to be ischemic optic neuropathy in two patients, and one case each of optic nerve drusen, glaucoma, congenital optic nerve pits, and retinitis pigmentosa sine pigmento. Thus 75% of the cases had an intraocular cause for the binasal hemianopia. Two patients had congenital hydrocephalus, and an intracranial basis was thus noted in 25% of these cases. The neurosurgeon should realize that the patient with binasal field defects is much more likely to have an ocular cause than an intracranial one for his problem.
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