Discover the Technologies That Make Auto-Dimming Mirrors Work

Our car experts at Lithia Subaru of Fresno in Fresno, CA have a goal to help our customers stay informed about their vehicles. Auto-dimming mirrors are a useful feature that many drivers don't think about, but without auto-dimming mirrors, drivers could have hindered vision from the Troxler Effect.

The Troxler Effect was coined by Gentex, which is an auto-dimming mirror manufacturer. This phenomenon occurs when the headlights of the vehicle behind you cause you to have a blind spot in your vision, and it can delay your reaction time by up to 1.4 seconds. While this may not seem significant, a vehicle can travel 123 feet in this amount of time if it's moving at 60 mph.

Auto-dimming mirrors are made with two sensors, which usually include photodetectors or cameras. When the mirror detects light from the vehicle behind you, it will send an electrochromic gel that will turn dark and block out glare from the vehicle's headlights.

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