| Ishihara color plates as a test for simultanagnosia. | |
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MedLine Citation:
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PMID: 9860021 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: To alert ophthalmologists to the use of Ishihara color plates in the detection of simultanagnosia. METHODS: We examined seven patients referred for impaired vision. Evaluation included color plate testing with Ishihara color plates. RESULTS: All seven patients had simultanagnosia, with marked difficulty in identifying the numbers in Ishihara color plates despite adequate visual acuity and the ability to name all of the colors in the plates correctly. One of these patients was referred with the diagnosis of a cone dystrophy because of her poor performance on the Ishihara test. All of the patients had bilateral occipitoparietal damage or atrophy on magnetic resonance imaging. CONCLUSIONS: Ophthalmologists must be aware that a poor performance with Ishihara plates may not be attributable to an impairment of color vision but rather to occipitoparietal brain damage associated with simultanagnosia. |
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Authors:
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P W Brazis; N R Graff-Radford; N J Newman; A G Lee |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: American journal of ophthalmology Volume: 126 ISSN: 0002-9394 ISO Abbreviation: Am. J. Ophthalmol. Publication Date: 1998 Dec |
Date Detail:
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Created Date: 1998-12-28 Completed Date: 1998-12-28 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0370500 Medline TA: Am J Ophthalmol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 850-1 Citation Subset: AIM; IM |
Affiliation:
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Department of Neurology, Mayo Clinic Jacksonville, Florida 32224, USA. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Agnosia
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diagnosis* Brain Diseases / diagnosis* Color Perception Color Perception Tests / instrumentation, methods* Humans Magnetic Resonance Imaging Occipital Lobe / pathology* Parietal Lobe / pathology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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