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Glare has been a particular concern for many years since new vehicles have brighter headlights that can sometimes cause discomfort or even temporarily blind other drivers.
Last year, the U.S. began allowing a headlight technology to improve nighttime visibility and reduce glare. But there are still no vehicles with it for sale.
A prismatic rear-view mirror—sometimes called a "day/night mirror"—can be tilted to reduce the brightness and glare of lights, mostly for high-beam headlights of vehicles behind which would otherwise be reflected directly into the driver's eyes at night. This type of mirror is made of a piece of glass that is wedge-shaped in cross-section ...
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Night driving is difficult and dangerous due to the blinding glare of headlights from oncoming traffic. Headlamps that satisfactorily illuminate the road ahead without causing glare have long been sought. The first solutions involved resistance-type dimming circuits, which decreased the intensity of the headlamps.
The Unified Glare Rating (UGR) is a measure of the glare in a given environment, accounting only interior artificial lights, proposed by Sorensen in 1987 and adopted by the International Commission on Illumination (CIE). It is basically the logarithm of the glare of all visible lamps, divided by the background lumination : [18]
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