Brunton Otoscope / Auriscope

Bruton otoscope with 3 mirrors in a box. Manufacturer/seller: PELLETIER Ainé, Paris, France, 19 centuuy. The set is housed in a dark-grey calico box with a spring-loaded clasp, purple velvet interior and a padded lid with an embossed gold logo of the maker. The manufacturer’s trademark is printed in gold lettering on the inside of the box lid, which reads: 

FAB-t  D’INSTRUMENTS de CHIRURGIE
PELLETIER AÎNÉ
29, Boul-rd St Germain

(Maker of the surgical instruments / PELLETIER Senior / 23, Boulevard Saint-Germain)

 

About Bruton's Otoscope

The Brunton auriscope (otoscope), introduced in 1865 by the Scottish physician John Brunton (1835-1899), represents one of the earliest compact instruments designed for direct examination of the ear. Developed in response to the limitations of earlier aural specula, Brunton’s device addressed two critical problems faced by clinicians: insufficient illumination of the ear canal and the inability to closely inspect the tympanic membrane without obstructing the light source.

Brunton’s innovation was grounded in the rapid progress of optical diagnostics in the mid-19th century. His instrument combined several key elements into a single portable device: a cylindrical tube, interchangeable ear specula, a magnifying eyepiece, and an internal concave mirror positioned at approximately 45 degrees. Light — whether from sunlight or a candle — was collected through a lateral funnel and reflected by the mirror into the ear canal, while the examiner observed the image through a perforation in the mirror aligned with the optical axis.

This optical configuration allowed for simultaneous illumination and magnification, producing a clearer and more detailed view of the tympanic membrane than had previously been possible. The alignment of the light path and viewing axis was a crucial design feature, minimizing obstruction and enhancing diagnostic precision.

Although the Brunton auriscope was limited to diagnostic use and did not permit simultaneous instrumentation, it quickly became the standard otological instrument in the United Kingdom and influenced the evolution of modern otoscopes. Its design anticipated later developments, including the integration of artificial light sources and more ergonomic handheld devices, ultimately shaping the principles underlying contemporary ear examination tools.

It was manufactured and offered by numerous instrument companies in the UK, France, Germany and United States and was presented in their trade catalogues (to name only some examples: Book of illustrations to S. Maw Son's Quarterly price-current of 1869, Arnold and Sons Instrument catalogue of 1876, George Tiemann American Armamentarium Chirurgicum of 1879, Lenz and Sons catalogue of 1915).

 

References

• Brunton J. A New Otoscope or Speculum Auris. Lancet 1865; 2 : 617-8
• Das Spekulum Auris des Herrn Dr. Brunton. Wolf W. Lübbers, Christian W Luebbers. April 2021. HNO Nachrichten 51(S1):40-41. DOI: 10.1007/s00060-021-7498-6
• The first compact auriscope: the 1865 speculum auris of Dr Brunton. Wolf Lübbers. ENT & Audiology News. Vol.32. No. 3; 3 July 2023