Head mirror

A frontal mirror, head mirror or eye mirror is mounted on a headband, a concave mirror with a hole in the center of the mirror to illuminate body orifices or for the eyes mirroring. The doctor directs the forehead mirror in the investigation of so that the examined organ is well lit by reflection of an external light source. At the same time he can examine the illuminated surface through the hole with one eye. The advantage of this is that the doctor himself does not cast a shadow on the subject matter.

The French physician Pierre Borel, member of the Paris Academy of Sciences began in the 17th century the concave mirror as a research tool. For the purpose of medical examination and better illumination of body openings and the fundus, he constructed a concave mirror to reflect and focus the light onto the object to be examined.

Concave mirrors are slightly modified still used as an end mirror or reflectors in medical diagnostics.