USE OF A VIDEO SCREEN VISUAL STIMULATOR - APPLICATION TO THE DETERMINATION OF COLORED SATURATION THRESHOLDS, CONTRAST SENSITIVITY THRESHOLDS AND 3-DIMENSIONAL BRAIN MAPPING

A high performance TV monitor driven by a special computer program is used for different stimulations. The results of the determination of c olored saturation thresholds for 50 subjects (27 normals and 23 with c olor vision anomalies) are discussed. Contrast sensitivity thresholds were checked on 44 normal subjects and 81 patients (especially multipl e sclerosis, Parkinson's and Wilson's disease). Brain three-dimensiona l mapping, produced by the same stimulation system, is measured on eig ht subjects with Alzheimer disease. Some characteristics of the result s obtained are presented.