In either 616 or Ultimate universe, is Psylocke's psionic blade visible to normal people? Since it's psychic energy, I've always just guessed it was only visible to those with physic preys Powers, like Xavier and Jean. The comics and cartoons often employ visual effects for certain characters powers for the viewers benefit, as those powers tend to be invisible in nature (Xavier, Magneto, Jean, basically any n-path, n-kinetic or magic based character, spidey sense).
In a similar fashion, does Iron Fist glowy fist of iron just an audience benefit or does it glow in universe?