Suppose you are driving at night on a flyover. Cars behind you are focusing their headlights just on your rearview mirror. That creates a perfect awful glare. It’s very annoying and uncomfortable for you. Sometimes it leads to an accident.fortunately, there is a solution for you. Drive safe at night. Use auto-dimming rearview mirrors.
In case of An auto-dimming mirror, it only does this kind of mirror dim automatically when there’s a bright light behind you, it also dims in proportion to the light source it’s dealing with, meaning the dimming effect will be far less pronounced when there’s a relatively faint light in your mirror.
It prevents something called the Troxler effect. so, what is Troxler effect?
According to Wikipedia Troxler’s fading, or Troxler fading, or the Troxler effect is an optical illusion affecting visual perception. When one fixates on a particular point for even a short period of time, an unchanging stimulus away from the fixation point will fade away and disappear. Recent research suggests that at least some portion of the perceptual phenomena associated with Troxler’s fading occurs in the brain.
According to Gentex, a company that is manufacturing auto-dimming rearview mirrors for years, the Troxler effect can reduce a driver’s reaction time by as much as 1.4 seconds. A car driving at 100km/h will travel 37.5m in that time.That can lead to a dangerous accident.
Let’s understand briefly How it works.
electrochromic materials are placed between the sheets of glasses. this type of material changes color when a potential difference is applied across it. With the electrochromic substances added to an auto-dimming mirror, when the electric voltage changes the way in which it absorbs and reflects light.
This types fo mirror consists of several light sensor and cameras. A microprocessor inside the mirror adjusts the darkness of the mirror according to lighting condition outside.
You can buy such mirrors from amazon.