TY - JOUR T1 - Exposure times for colour discrimination in the parafoveal field: a new procedure to detect subtle visual dysfunction in multiple sclerosis patients. JF - Journal of Neurology, Neurosurgery & Psychiatry JO - J Neurol Neurosurg Psychiatry SP - 400 LP - 404 DO - 10.1136/jnnp.49.4.400 VL - 49 IS - 4 AU - R Menabue AU - P Nichelli AU - S Bellei Y1 - 1986/04/01 UR - http://jnnp.bmj.com/content/49/4/400.abstract N2 - A new procedure to test colour discrimination in the parafoveal field is described. This method was used on 25 healthy controls and 25 subjects having a definite clinical or laboratory-supported diagnosis of multiple sclerosis, with or without a previous history of optic neuritis. The test proved to be sensitive in detecting visual dysfunction even in some patients in whom the standard technique of pattern-reversal evoked potential recordings yielded a normal result. ER -