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.
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.
[Perception of light modulation] / N., Accornero; Berardelli, Alfredo; F., Fabiano; Inghilleri, Maurizio; L., Taverniti. - In: BOLLETTINO DELLA SOCIETA' ITALIANA DI BIOLOGIA SPERIMENTALE. - ISSN 0037-8771. - STAMPA. - 59:12(1983), pp. 1980-1983.
[Perception of light modulation].
BERARDELLI, Alfredo;INGHILLERI, Maurizio;L. Taverniti
1983
Abstract
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
