The commenter recounts a near collision attributed to glare from an oncoming vehicle's LED headlights.

I can testify to a near fatality involving LED headlamps. It involved 3 cars. One, with LED headlamps, in the opposite lane of other two cars. I was in the first car, without LEDs, and was approaching a curve over a gorge. Another car was behind me, also no LEDs from my rearview mirror assessment. Second car may have been travelling too close to my car but not unsafely. The car approaching us in the opposing lane came into our sightline while we entered the curve. I was totally blinded by the LEDs and had to apply my brakes hard because I did not know where I was on the curve. The second driver did the same but not as quickly because, when the LEDs had passed and our eyes adjusted, she was nearly touching my bumper. We could both have plummeted into that gorge, and the LED driver wouldn't have even known to call rescue. Afterall, they could see clearly even as they blinded us.