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Is dimming your vision is the only approach?
Absolutely Not!
Just dimming is like squinting your eyes instead of wearing sunglasses.
How it works:
Human vision adapts to ambient light levels; the retina in the eye contains two types of light "sensors", called rods and cones. The rods are active in low light levels and have no color sensitivity. The cones are sensitive to color and handle the vision color and details. During nighttime driving, the human eye is adapted to the mesopic light levels meaning that both the cons and rods are active.
Night driving exposes the driver to glare generated by other vehicles headlamps. There are two types of glare, Disability glare and Discomfort glare. Disability glare is affected mainly by the amount of light and reduces the vision performances and Discomfort glare is affected mainly by the headlamp spectrum. It was understood and reported for decades that "blue" light causes more discomfort glare then "yellow" or "Red" light. A series of studies indicated that higher energy in short wavelengths increases the discomfort glare. As a driver, you may sense more of a discomfort glare generated by new vehicles equipped with HID headlamps than standard halogen headlamps. This is because HID headlamps generate bright white light that has relatively more energy in the blue spectrum.
AlphaMirror Spectral Protection™ technology adeptly tunes the reflected wavelengths and eliminates or minimizes the "blue" reflectance; therefore Spectral Protection™ will maximize the driver’s visual performance while eliminating discomfort glare.
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