2, the eye can not tolerate fog, usually used to mean that a person is very smart, can predict the development and future trend of a thing from a small place. Later, it was transformed into a derogatory term to describe a person who doesn't know right and wrong, have it both ways. Although he can stay out of it and not participate in it, he will easily stand still and dare not make some innovative moves and behaviors because he has lost his innovative spirit. Metaphor is that a person is very stiff and it is difficult to break through the boundaries.