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Comment by ajross | Hacker News Reader

Really? I found exactly the opposite. I moved from white backgrounds to a dark theme (emacs color-theme's "gnome2", basically #f5deb3 on #2f4f4f, not unlike zenburn) a year ago and found my eyes were much more relaxed after a bunch of coding.

I actually find looking at white-backgrounded web sites (like HN) to be fatiguing these days.

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FWIW, I also find black backgrounds straining. I usually have to hit dark sites with readability to read them comfortably. Perhaps it's a matter of what your eyes are used to?

To be clear, a true black background is awful, I agree. Some sites think things like white/yellow on #000000 is a good idea, and it's just a terrible readability disaster. But the "DarkSlateGray" background of gnome2 is entirely different, IMHO. Give it a shot for a few days and see what you think.

Or the "slate" theme for gvim

It's probably at least partly a matter of how the rest of your room is lit. Your sight is sharpest when your pupils are small, so a bright monitor in a bright room will work best for many people.

However, if you're looking at a dark monitor in a bright room, or at a bright monitor in a dark room, your pupils may be too large for the amount of light that reaches them to be entirely comfortable, which causes squinting and eyestrain.

A dark monitor in a dark room won't have that problem, but you may still be dealing with some increased blurriness because of your enlarged pupils, which may bother you depending on how good your eyesight is.

I can't read prose on a dark background, but I find scanning code to be fine.

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