Definition
Condition of vision of persons within the illuminated area of a lighting installation in which there is discomfort and/or a reduction in the ability to see details or objects, caused by an unsuitable distribution of luminance and/or an unsuitable range of luminance values [1].
Note that conditions of discomfort or reduction of vision for persons not within the illuminated area are not covered by this definition. That condition is caused by obtrusive light into areas where the light is not meant to be. The effect is called light pollution and is dealt with in a separate entry.
Forms of Glare
Glare can take the form of disability glare that is the form which reduces visual performance. It can also take the form of discomfort glare which causes discomfort. The two forms are different phenomena. They may occur in combination but this needs not always to be the case. Disability glare is especially dependent on the amount of light falling on the eye and hardly on the luminance of...
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van Bommel, W. (2016). Glare. In: Luo, M.R. (eds) Encyclopedia of Color Science and Technology. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-8071-7_125
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