An indrawn membrane presents characteristic appearances (Plate X, 2);
the short process is prominent and causes the anterior and posterior malleolar
folds to be much exaggerated, especially the latter which frequently present a
sickle shape. The handle of the malleus is foreshortened and rotated, so that
it lies in a more backward direction than usual. This change in direction
brings the umbo into the upper half of the membrane and thus the light
reflex is displaced, being extended or fragmented to appear as a mere spot of
light at the periphery.