> But with white-on-black, letterforms glow with blurry edges and connect into each other. Not on the screen, but on your retina. The same way streetlamps at night appear to have a halo. Words take more effort to read.

I, uh, don't see a halo. Never have. I see streaks/starbursts, kinda like this quora post [0], except I've seen streetlights like that my whole life (so I don't think it's an eye problem like they suggest). Maybe that influences why I find dark mode easier on the eyes? No blurring, but it's also not sharp enough to cause the starburst.

[0] https://www.quora.com/What-are-those-peripheral-rays-of-ligh...