In general, being told something should have no impact on our vision except in specific, ambiguous circumstances. We want our interperetations of the world to be stable.

One example could be the dress illusion. For some people, being told of an alternate interpretation of the scene causes the dress to appear to be a different color.

Another example might be Fuller et al. 2006. Here, an attentional cue affects the perceived saturation (but not hue) of a stimulus. This is sort of like being told something ("look over here") and having that affect your perception.