With auto-dimming rearview mirrors, you get special assistance to see better while driving at night. These automatically adjust your mirror when bright lights shine on you from behind.
There are sensors in these mirrors that detect when vehicle approaching from behind your automobile. Once their headlight rays hit your car, the mirror will darken, which decreases any glare. This decrease will happen quickly, allow you to see more clearly, and increase your chances for safety on the road.
This system can occur since auto-dimming mirrors have gotten equipped either electrochromic technology or photochromic technology. This is like a special gel or film that responds to light and limits the amount of light that can reflect to your eyes.
Along with the dimming capability, they may also have added features like temperature detectors or compasses that make your driving experience much easier.