When I ride on a bike path alongside an unlit road in the dark, I find myself blinded by the lights of oncoming cars, even when their lights are dimmed. This is even more true if the bike path is on the left side of the road. Currently, I mitigate this by holding one hand in front of the lights of the oncoming cars, but I wonder if there are superior strategies. The military tend to use bright flashing lights as one weapon to blind their adversaries, so I expect they have also developed defensive strategies against such blinding. How can I prevent being blinded by the (dimmed!) lights of opposing cars?
Example of bike path. It's much worse in sections without a rail.