Document Detail

Detecting color vision in a malingerer.
MedLine Citation:
PMID:  12678276     Owner:  NLM     Status:  MEDLINE    
A patient describing himself as totally color blind was ordered by the judicial system to have his color vision investigated in order to establish his suitability for military service. Basic clinical (Farnsworth Panel D-15, Moreland and Rayleigh anomaloscope equations), electroretinographic (ERG) and psychophysical techniques (spectral sensitivities) were applied to determine the extent of his color discrimination performance and cone function. These standard procedures were complemented by a test for cone interaction (transient tritanopia) and by newly developed cone-isolating flicker large-field ERG recordings. The patient's data consistently indicate the function as well as the functional interaction of the middle-wavelength-sensitive (M-) and the short-wavelength-sensitive (S-) cones. But the function of the long-wavelength-sensitive (L-) cones was completely absent. Hence the patient was correctly demonstrated to be a protanope. This study establishes that standard classical procedures, in combination with newly developed and easy to apply psychophysical and ERG ones, which can be reliably used to assess true color discrimination performance, in difficult cases of malingering.
Herbert Jägle; Bettina Sadowski; Jan Kremers; Hendrik P N Scholl; Beate Leo-Kottler; Lindsay T Sharpe
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Publication Detail:
Type:  Case Reports; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Documenta ophthalmologica. Advances in ophthalmology     Volume:  106     ISSN:  0012-4486     ISO Abbreviation:  Doc Ophthalmol     Publication Date:  2003 Mar 
Date Detail:
Created Date:  2003-04-07     Completed Date:  2003-05-01     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0370667     Medline TA:  Doc Ophthalmol     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  121-8     Citation Subset:  IM    
University Eye Hospital, Department of Pathophysiology of Vision & Neuro-Ophthalmology, Schleichstr. 12-16, D-72076 Tübingen, Germany.
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MeSH Terms
Color Perception / physiology*
Color Perception Tests
Color Vision Defects / diagnosis,  physiopathology*
Disability Evaluation
Electroretinography / methods
Malingering / diagnosis,  physiopathology*
Retinal Cone Photoreceptor Cells / physiology*
Sensory Thresholds

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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