The mirror inside of your vehicle at the top of your windshield and the side mirrors on your vehicle can all have electrochromic technology that will cause them to dim without you having to intervene. This is a great convenience feature you can enjoy while driving in Davie, FL, but it also contributes to the overall safety of your vehicle.
When the sensor on your vehicle detects that there is a substantial amount of glare being caused by another vehicle's headlights, there is an electrochromic gel in between two pieces of glass that will change thanks to electricity that's being fed through it. There are different degrees of changes that can occur, and this will cause your mirror to become more or less dim. The glass will then clear when your vehicle's sensor determines that there is no glare that is impeding your ability to drive safely.