Visual Field Defects in Congenital Hydrocephalus
Various kinds of visual field defects were found in 15 patients with congenital hydrocephalus and optic atrophy. Paracentral defects and caecocentral scotomata were most frequent and occurred in 8 patients. These defects were ascribed to direct or indirect compression of the chiasma and the optic nerves by a distended third ventricle during attacks of intracranial hypertension. Although the pale optic discs had abnormally sharp borders, transient papilloedema had occurred in the majority of these cases. Concentric contraction and optic atrophy with blurred discs after papilloedema were found in 2 patients and dense central scotomata due to macular changes in 3. The remaining 2 patients had homonymous hemianopic defects, i.e. lesions of the post-chiasmatic visual pathway.
KeywordsRetinal Nerve Fibre Layer Intracranial Hypertension Visual Field Defect Optic Atrophy Concentric Contraction
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