Wondering if it's because I have astigmatisms in both eyes - I'm sure I've read somewhere that's the case but cannot remember where.
I throughout strongly prefer high contrast schemes -- indeed I don't like any syntax colouring at all.
I'd like to see that article if you can find it. I admit as a sample size of one I might be aberrant but if not, then the effect you describe (if it exists) might have a neurological basis as well.
Also mentions that despite 20/20 vision from LASIK, contrast sensitivity may not return.
I don't think we are alone :)
Has the added benefit that opening google doesn't burn out your eyes and you can still see in sunlight too, when you turn up the brightness.