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Documenta Ophthalmologica

, Volume 106, Issue 2, pp 121–128 | Cite as

Detecting color vision in a malingerer

  • Herbert Jägle
  • Bettina Sadowski
  • Jan Kremers
  • Hendrik P.N. Scholl
  • Beate Leo-Kottler
  • Lindsay T. Sharpe
Article

Abstract

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.

color vision color blindness color blind malingering achromatopsia cone isolating ERG 

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Copyright information

© Kluwer Academic Publishers 2003

Authors and Affiliations

  • Herbert Jägle
    • 1
  • Bettina Sadowski
    • 1
  • Jan Kremers
    • 1
  • Hendrik P.N. Scholl
    • 1
  • Beate Leo-Kottler
    • 1
  • Lindsay T. Sharpe
    • 2
  1. 1.Department of Pathophysiology of Vision & Neuro-OphthalmologyUniversity Eye HospitalTübingenGermany
  2. 2.Department of PsychologyUniversity of NewcastleNewcastle-upon-TyneUK

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