I do not have astigmatism (or at least I think I don’t) but I notice that the rows of white letters stay burned in my vision, the contrast was so high it’s as i

I do not have astigmatism (or at least I think I don’t) but I notice that the rows of white letters stay burned in my vision, the contrast was so high it’s as if I am staring at small strong light sources. So I prefer black letters on light background.