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It is very difficult/impossible to focus on blue images because the focal plane of the eye and blue cones (2% of cones) are out of alignment.

https://biology.stackexchange.com/questions/30600/why-cant-t...

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Huh, I was told that night vision would get worse after LASIK, but the main thing I found was that blue signs, particularly white text on a lit blue background, is illegible for me at night. Maybe all I was actually noticing is ordinary human limitations.

White text on a blue background are what we used for Wordperfect for DOS in the ye olden days specifically because the white popped out of the background. If this is paradoxically worse, then maybe there is an actual problem. But I would look at white console text on a blue background on a computer monitor first before reaching any conclusion.

I sometimes use prism glasses.

Terminal drives me nuts because red text appears to be floating behind everything else. Blue text is similar. Is incredibly distracting.

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