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too much contrast?

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From: Iaffaldano, Michelangelo
Date: Apr 14, 2014 3:35PM

WCAG are explicit about insufficient brightness and colour contrast between text and background. But is there such a thing as too much contrast? I've read a bit about scotopic sensitivity syndrome in relation to dyslexia. I have also recently heard that black text on white is not ideal for people with astigmatism (although I am one and have not noticed this effect).

I avoid pure black text on white in my designs but that's mostly out of personal taste, since I don't have any solid data to back the point. Do you good people have any user testing data or other direct experience in support of (or against) this idea?

Michelangelo Iaffaldano