A concave mirror is used as a head mirror by ENT specialists. The same mirror can also be used as a shaving mirror. Why?

Explanation

A concave mirror converges the rays of light falling on it in a direction parallel to the principal axis, on to its focus. That is why ENT specialists use it as a head mirror.
When an object is held between the pole and the principal focus of a concave mirror, the mirror forms a virtual, erect and magnified image of the object. That is why it can be used as a shaving mirror.