Ignaz Paul Vital Troxler (August 17, 1780 – March 6, 1866) was a

Swiss Swiss may refer to: * the adjectival form of Switzerland * Swiss people Places * Swiss, Missouri * Swiss, North Carolina *Swiss, West Virginia * Swiss, Wisconsin Other uses *Swiss-system tournament, in various games and sports *Swiss Internation ...

physician A physician (American English), medical practitioner (Commonwealth English), medical doctor, or simply doctor, is a health professional who practices medicine, which is concerned with promoting, maintaining or restoring health through th ...

politician A politician is a person active in party politics, or a person holding or seeking an elected office in government. Politicians propose, support, reject and create laws that govern the land and by an extension of its people. Broadly speaking, a ...

, and

philosopher A philosopher is a person who practices or investigates philosophy. The term ''philosopher'' comes from the grc, φιλόσοφος, , translit=philosophos, meaning 'lover of wisdom'. The coining of the term has been attributed to the Greek th ...

Early life, education, and career

Troxler was born in August 1780 in

Beromünster Beromünster is a municipality in the district of Sursee in the canton of Lucerne in Switzerland. On 1 January 2004 the former municipality of Schwarzenbach merged into the municipality of Beromünster.Switzerland ). Swiss law does not designate a ''capital'' as such, but the federal parliament and government are installed in Bern, while other federal institutions, such as the federal courts, are in other cities (Bellinzona, Lausanne, Luzern, Neuchâtel ...

. He studied in

Jena Jena () is a German city and the second largest city in Thuringia. Together with the nearby cities of Erfurt and Weimar, it forms the central metropolitan area of Thuringia with approximately 500,000 inhabitants, while the city itself has a popu ...

and

Göttingen Göttingen (, , ; nds, Chöttingen) is a college town, university city in Lower Saxony, central Germany, the Capital (political), capital of Göttingen (district), the eponymous district. The River Leine runs through it. At the end of 2019, t ...

. Among his teachers were

Georg Wilhelm Friedrich Hegel Georg Wilhelm Friedrich Hegel (; ; 27 August 1770 – 14 November 1831) was a German philosopher. He is one of the most important figures in German idealism and one of the founding figures of modern Western philosophy. His influence extends ...

and

Friedrich Wilhelm Joseph von Schelling Friedrich Wilhelm Joseph Schelling (; 27 January 1775 – 20 August 1854), later (after 1812) von Schelling, was a German philosopher. Standard histories of philosophy make him the midpoint in the development of German idealism, situating him be ...

. After earning his degree, he worked as a physician in

Vienna en, Viennese , iso_code = AT-9 , registration_plate = W , postal_code_type = Postal code , postal_code = , timezone = CET , utc_offset = +1 , timezone_DST ...

, where he befriended

Ludwig van Beethoven Ludwig van Beethoven (baptised 17 December 177026 March 1827) was a German composer and pianist. Beethoven remains one of the most admired composers in the history of Western music; his works rank amongst the most performed of the classical ...

and married Wilhelmine Polborn. During that time, Troxler discovered a phenomenon of

visual perception Visual perception is the ability to interpret the surrounding environment through photopic vision (daytime vision), color vision, scotopic vision (night vision), and mesopic vision (twilight vision), using light in the visible spectrum reflecte ...

which is remarkably often confused with color-fading color-adaptation, that now bears his name,

Troxler's fading Troxler's fading, also called Troxler fading or the Troxler effect, is an optical illusion affecting visual perception. When one fixates on a particular point for even a short period of time, an unchanging stimulus away from the fixation point wi ...

Teaching and later life

In 1811, he returned to Beromünster. Troxler represented Switzerland at the

Congress of Vienna The Congress of Vienna (, ) of 1814–1815 was a series of international diplomatic meetings to discuss and agree upon a possible new layout of the European political and constitutional order after the downfall of the French Emperor Napoleon B ...

in 1815. In 1820 he became a professor for philosophy and history at the

lyceum The lyceum is a category of educational institution defined within the education system of many countries, mainly in Europe. The definition varies among countries; usually it is a type of secondary school. Generally in that type of school the th ...

Lucerne Lucerne ( , ; High Alemannic German, High Alemannic: ''Lozärn'') or Luzern ()Other languages: gsw, Lozärn, label=Lucerne German; it, Lucerna ; rm, Lucerna . is a city in central Switzerland, in the Languages of Switzerland, German-speaking po ...

but had to leave after a year due to political problems. He founded an educational institution in

Aarau Aarau (, ) is a List of towns in Switzerland, town, a Municipalities of Switzerland, municipality, and the capital of the northern Swiss Cantons of Switzerland, canton of Aargau. The List of towns in Switzerland, town is also the capital of the dis ...

and continued working as a physician. In 1830, he returned to teaching, this time in

Basel , french: link=no, Bâlois(e), it, Basilese , neighboring_municipalities= Allschwil (BL), Hégenheim (FR-68), Binningen (BL), Birsfelden (BL), Bottmingen (BL), Huningue (FR-68), Münchenstein (BL), Muttenz (BL), Reinach (BL), Riehen (BS ...

; but had to leave once again the next year due to political problems. In 1832 he was elected to the legislative assembly of the

canton Canton may refer to: Administrative division terminology * Canton (administrative division), territorial/administrative division in some countries, notably Switzerland * Township (Canada), known as ''canton'' in Canadian French Arts and ent ...

Aargau Aargau, more formally the Canton of Aargau (german: Kanton Aargau; rm, Chantun Argovia; french: Canton d'Argovie; it, Canton Argovia), is one of the 26 cantons forming the Swiss Confederation. It is composed of eleven districts and its capita ...

. He became a professor at the newly established

University of Berne The University of Bern (german: Universität Bern, french: Université de Berne, la, Universitas Bernensis) is a university in the Swiss capital of Bern and was founded in 1834. It is regulated and financed by the Canton of Bern. It is a comp ...

in 1834, where he stayed until 1850. In 1848, Troxler succeeded in altering the

Swiss Federal Constitution The Federal Constitution of the Swiss Confederation (SR 10; german: Bundesverfassung der Schweizerischen Eidgenossenschaft (BV); french: Constitution fédérale de la Confédération suisse (Cst.); it, Costituzione federale della Confederaz ...

to include elements of the

United States Constitution The Constitution of the United States is the Supremacy Clause, supreme law of the United States, United States of America. It superseded the Articles of Confederation, the nation's first constitution, in 1789. Originally comprising seven ar ...

Death

Troxler died on March 6, 1866 in Aarau, Switzerland, and is buried there.

References

{{DEFAULTSORT:Troxler, Ignaz Paul Vital 1780 births 1866 deaths Swiss psychologists 19th-century Swiss physicians Swiss philosophers People from Aarau