[aasasd]

A comment elsewhere in the thread explains the mechanism of why light background results in better eye focus: https://news.ycombinator.com/item?id=33403128

Probably relevant with astigmatism, since tighter focus should at least somewhat alleviate the shifty out-of-place edges (hopefully).

[xwowsersx]

Just seeing your comment. Thanks for the link, that was a great comment and helped me to understand something I experience but did not understand the cause of!