Homonymous hemianopia - case report
Keywords:
homonymous hemianopia, carotid-ophthalmic artery aneurysms, retrochiasmal lesions of the visual pathwaysAbstract
Background: Homonymous hemianopia is a temporal visual hemifield loss of one eye and nasal visual hemifield loss of another eye. It is caused by optic tract or radiations lesions. Incongruous defects are characteristic for optic tract and congruous visual field defects are appearing in optic radiations and occipital cortex lesions. Etiologically, homonymous defects are usually vascular in origin, however they could appear in brain tumours, central nervous system infections, traumatic brain lesions and migraine.
Case report: We present a clinical picture, diagnostic procedures and course of events in 54 years old patient who was examined Eye Clinic at Clinical Centre, because of homonymous visual field defect. The cause of homonymous hemianopia in patient were the intracranial aneurysms. The article, from ophthalmologic point of view, discusses symptoms and signs of aneurysms, diagnostic considerations and possible complications.
Conclusions: Incongruous homonymous hemianopia is an ophthalmologic emergency and is characteristic of optic tract lesions, between which are also aneurysms of the carotid system, especially carotid-ophthalmic artery aneurysms. Recognition, prompt diagnostic consideration and treatment action are crucial in prevention of life-threatening complication as rupture of aneurysm and consecutive subarachnoid haemorrhage is.
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