August Siegrist was a Swiss

Switzerland

Switzerland name of one of the Swiss cantons. ; ; ; or ), in its full name the Swiss Confederation , is a federal republic consisting of 26 cantons, with Bern as the seat of the federal authorities. The country is situated in Western Europe,Or Central Europe depending on the definition....

 ophthalmologist remembered for describing Siegrist streaks

Siegrist streaks

Siegrist streaks are a rare manifestation of hypertensive choroidopathy. They are described as hyper-pigmented flecks that are arranged in a linear fashion along the choroidal vessels of the eye....

. He trained at Basel, Zurich

Zürich

Zurich is the largest city in Switzerland and the capital of the canton of Zurich. It is located in central Switzerland at the northwestern tip of Lake Zurich...

, Lausanne

Lausanne

Lausanne is a city in Romandy, the French-speaking part of Switzerland, and is the capital of the canton of Vaud. The seat of the district of Lausanne, the city is situated on the shores of Lake Geneva . It faces the French town of Évian-les-Bains, with the Jura mountains to its north-west...

, Vienna

Vienna

Vienna is the capital and largest city of the Republic of Austria and one of the nine states of Austria. Vienna is Austria's primary city, with a population of about 1.723 million , and is by far the largest city in Austria, as well as its cultural, economic, and political centre...

 and Bern, where he received his M.D.

Doctor of Medicine

Doctor of Medicine is a doctoral degree for physicians. The degree is granted by medical schools...

 in 1892. He studied further in Bern under Emil Theodor Kocher

Emil Theodor Kocher

Emil Theodor Kocher was a Swiss physician, medical researcher, and Nobel laureate for his work in the physiology, pathology and surgery of the thyroid....

 and in Vienna under Ernst Fuchs

Ernst Fuchs (doctor)

Ernst Fuchs was an Austrian ophthalmologist and physician best known for his contribution to description and identification of Fuchs heterochromic iridocyclitis in 1906, Fuchs's dystrophy, and his contributions in the field of ophthalmology including but not limited to Fuchs spot...

. He was habilitated

Habilitation

Habilitation is the highest academic qualification a scholar can achieve by his or her own pursuit in several European and Asian countries. Earned after obtaining a research doctorate, such as a PhD, habilitation requires the candidate to write a professorial thesis based on independent...

 in ophthalmology at Basel in 1900, and became professor of ophthalmology and director of the eye clinic of the University of Bern from 1903 to 1935. He worked on the correction of keratoconus

Keratoconus

Keratoconus , is a degenerative disorder of the eye in which structural changes within the cornea cause it to thin and change to a more conical shape than its normal gradual curve....

 including the use of early contact lens

Contact lens

A contact lens, or simply contact, is a lens placed on the eye. They are considered medical devices and can be worn to correct vision, for cosmetic or therapeutic reasons. In 2004, it was estimated that 125 million people use contact lenses worldwide, including 28 to 38 million in the United...

es.