Any otoscopic examination should begin with that of the presumed healthy ear. Indeed, in the absence of antecedents, the tympanic normality will be given according to the examination of the tympanum opposed to the lesion which leads to consult.
A normal tympanum is classically transparent, gray in color, well stretched around the circumference, which is the bottom of the external auditory canal. Some elements are spontaneously identifiable either directly or by transparency. The other structures belonging to the middle ear can be visualized only in the absence of eardrum or perforation sitting facing the anatomical structure considered.