I have always thought one of those clear visors that are advertised on TV would be a good thing. When I come out of the "dark" house, the sun seems very bright and that would cut the glare. The separate unit for night driving would be useless. We don't go out at night.
So I saw an ad for one and ordered it. After we put it on the visor and flipped the yellow part down, I needed about six inches added to the height of my seat in the van. The picture on the right showing a truck approaching, is about where ours is blocking the sun - not in my line of sight. I guess if I look up, the sky will be not a glare.