do you wear glasses or contacts? do you have trouble seeing blue signs?

[AlphaDog]

I, too, have pretty significant astigmatism in both eyes, along with hyperopia, which is farsightedness caused by an imperfection in the eye, rather than by aging (I've got some of that, too.) I've noticed no difference in my ability to read signs because of their color. With glasses, I can read them; without glasses, I can't. It's pretty straightforward!