For those with synesthesia, the world seems no more interconnected than they assume it always is for the rest of us, until the person with the condition casually mentions how lively and bright blue the letter K always is to a playmate, who then reacts in a baffled way.

It is a condition that an unknown number of people have, but it is a condition to which the modifier “suffers” can not be added, because it does not often have negative effects on an individual’s life. (For some, it must have negative effects, just as any condition might.) It is not known how many people have or might have some form of synesthesia because not many people take the time or are offered the opportunity to describe the way they perceive how they perceive the things they perceive.
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