It tells of an abyss over an edge, a vertical horizon pointing at the profundity. It is not a horizon to try to cross but rather a cliff to avoid falling into. Nonetheless, falling and sinking remain one’s destiny. It is a frightening view to the eye, insistently blinking to make it vanish. But the disturbing presence remains, the existence of the abyss is there, remarked by the floaters sliding on the cornea every time one blinks. “Un malaise” that one cannot avoid thinking about because it stays.