The laboratory study evaluated the effect of the size of the glare source on discomfort glare. The subjects performed two simultaneous tasks: continuous compensatory tracking, and evaluation of discomfort from glare stimuli presented periodically in the near visual periphery. The glare stimuli were circles of two sizes (approximately 0.3 and 0.6 degrees in diameter), and five illuminance levels (from 0.03 to 3.1 Lux). Subjects used a 9-point response scale to evaluate discomfort glare. The results indicate that there was a small but statistically significant effect of glare size, with the smaller glare stimuli resulting in more discomfort glare. The mean difference over the range of glare illuminances tested was 0.2 points on the 9-point response scale.


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    Title :

    Effect of Headlamp Area on Discomfort Glare


    Contributors:
    M. Sivak (author) / C. J. Simmons (author) / M. J. Flannagan (author)

    Publication date :

    1988


    Size :

    22 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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