Chonnam Med J.
2007 Dec;43(3):224-228.
A Case of Cortical Blindness Detected by BrainSingle Photon Emission Computed Tomography (SPECT)
- Affiliations
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- 1Department of Ophthalmology, Chonnam National University Medical School, Chonnam National University Research Institute of Medical Sciences, Gwangju, Korea. kcyoon@chonnam.ac.kr
- 2Department of Nuclear Medicine, Chonnam National University Medical School, Chonnam National University Research Institute of Medical Sciences, Gwangju, Korea.
Abstract
- We report a case of cortical blindness in cerebral ischemia diagnosed by single photon emission computed tomography (SPECT). A 52-year-old woman complained of bilateral visual field defect. Best corrected visual acuity was 0.15 in both eyes. Pupillary light reflex was normal, and ophthalmic examination did not show any specific findings. Pupillary light reflex, funduscopic examinations and eyeball movements were normal. Visual field examination showed partial peripheral visual field defect. Pattern and flash visual evoked potential examination revealed no specific finding, neither did brain magnetic resonance imaging. However, brain SPECT demonstrated multiple hypo-perfused lesions in the both occipito-temporal, parietal and frontal areas and moderate perfision defects in both cerebellar hemisphere. We think that brain SPECT scanning can be a useful examination for diagnosis of cortical blindness in patients with decreased visual acuity who have negative radiologic findings.
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