Abstract: A dental hand mirror unit includes a generally hollow handle portion which supports a mirror at one end and has its other end releasably coupled to a cap or valve member. Air is fed through the cap member and handle portion and is directed outwardly along the upper surface of the mirror to prevent it from fogging. Rotation of the cap member controls the flow of air to the mirror as desired. In one embodiment, light from a light dispersion element positioned in a chamber beneath a two-way mirror passes outwardly through the mirror and into a patient's mouth. In addition, light is transmitted to such dispersion element by a bundle of optic fibers positioned within an optical fiber passageway portion of the dental hand mirror unit.