Why are they illusive? Because they don't exist. But the trauma of one experience is good enough to make you believe that they do. The eyes gaze at you once, and you just know. They'll never be satiated with one glance. The eyes will return to torment you in nightmares, day-mares and probably year-mares even. They have the power to turn you into a paranoid twitcher who constantly glances over her shoulder, almost as if the eyes were to descend on this very second.
*That's* the power of being stalked. Words can never probably justify the feeling, because the eyes do the talking. You haven't seen the eyes before, maybe not in a long while, but you know that they're there somewhere. Watching.
But then again, maybe they're not. Maybe the stalker was content with one look and disappeared into oblivion. How would you tell, though? The paranoia that the stalker leaves behind as a remnant of his deed lurks about you constantly, enveloping you in a cold blanket of suspicion.
It is a strange phenomenon, stalking. Perhaps not everyone falls in the category of those people who seek voyeuristic gratification. Maybe they're simply shy to walk up and talk. Maybe they fear, or even resent, rejection. But how can one tell the difference? Once stalked, the victim pigeonholes all peeping toms into the category of treacherous villains. It isn't easy to extricate an innocuous follower from that pigeonhole, once he has been categorized. Attempts to do so would only show a momentary lapse of caution, maybe vulnerability even.
The illusive eyes fade away with time, one hopes. Maybe, just maybe, the phase is transient and the eyes find another object. Or maybe the eyes come to terms with the fact that some meetings and relationships are simply not destined to be. The Illusive Eyes that they are, the illusive eyes they'll remain.