COLOR DISCRIMINATION THRESHOLDS IN PARKINSONS-DISEASE - RESULTS OBTAINED WITH A RAPID COMPUTER-CONTROLLED COLOR-VISION TEST

A dysfunction of dopaminergic retinal neurons is thought to occur in P arkinson's disease, manifesting itself in impaired performance on vari ous visual discrimination tasks. We have investigated whether differen ces in colour discrimination could readily be detected between a norma l group and a Parkinsonian group, using a computer-controlled test of colour vision. Although some individual Parkinsonian patients showed a n abnormal elevation of colour discrimination thresholds, there was no significant difference between the normal group and the Parkinsonian group. (C) 1998 Elsevier Science I,td. All rights reserved.