[Perception of light modulation].
A simple method for testing visual sensitivity to flickering light sources is proposed. The method employs a triangular function generator, which modulates the luminance of a chromatic light source. Amplitude and frequency of the triangular pattern are adjusted until the subject perceives a periodic variation of luminance. In normal subjects the maximum sensitivity was found at a frequency modulation of 5-10 Hz. In multiple sclerosis patients the method proved to be more accurate than flicker fusion frequency in revealing subclinical damage of the visual pathway.
D005425:Flicker Fusion / Q000502:physiology; D006801:Humans; D009103:Multiple Sclerosis / Q000503:physiopathology; D010775:Photic Stimulation; D014796:Visual Perception / Q000502:physiology*
Studio della percezione della modulazione luminosa.