Let’s talk about dark mode and accessibility! There’s a myth that dark mode is good for accessibility, because it improves text readability. It's not always true.
The full article and resources on my blog: https://stephaniewalter.design/blog/dark-mode-accessibility-myth-debunked/
@stephaniewalter Fwiw, I don't think the Level Access blog actually provides an explanation why astigmatism causes this effect.
I looked into the blog citations trail on this a while back and came to the conclusion that most traced back to this page that's now only available via archive: https://web.archive.org/web/20090109135027/http://www.cs.ubc.ca/spider/harrison/document-colors.html
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Quoting from that archive link, the reason is related to how the lens is deformed in those of us with astigmatism:
"Part of this has to do with light levels: with a bright display (white background) the iris closes a bit more, decreasing the effect of the "deformed" lens; with a dark display (black background) the iris opens to receive more light and the deformation of the lens creates a much fuzzier focus at the eye."
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Stef Walter
Ann 🧡 (she/her)