The focus of this book is the topic: visual diagnostics through the ear. The ear is a reflection of a person's genetic predisposition, and it is a natural desire to be able to recognize, at a glance, who the other person is and where their weaknesses lie. The ability to "unmask" someone with a glance at their ear is likely as old as humanity itself. The ear is one of the organs that undergoes little change. The impression that older people have excessively larger ears is probably not only due to the fact that the face becomes smaller in relation to the ears. The ear grows steadily, but only slightly in relation to other body parts, and above all, it does not change its structures. Thus, the view of the "basis" remains unchanged, regardless of the age of the person being observed. It is said that kidneys are roughly the size of ears.