Origins of the binocular head mirror: The mystery of Dr. Clar, clarified

BackgroundThe origin of Dr. Clar's forehead mirror remains a mystery. The aim of this study is to track the roots of this eponym anew to find a definitive answer.MethodsHistorical, notably by the analysis of the reports of medical meetings and the content of instrument trade catalogs of the corresponding epoch.ResultsKonrad or Conrad Clar (1844–1904) was an Austrian balneologist and geologist particularly interested in laryngological examination. He notably invented a lighting apparatus in 1874, his famous forehead mirror in 1886, and a handgrip for laryngological instruments in 1901.ConclusionsKonrad Clar is the man behind the eponymous Dr. Clar's mirror. This study allowed to definitively confirm this statement.