Eugène Kalt was a French ophthalmologist who developed the first known application of a 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...

 for 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....

. In 1888, he worked on a crude flat-fitting glass scleral lens

Scleral lens

A scleral lens is a large lens that rests on the Sclera and creates a Tear-filled vault over the Cornea. Scleral lenses are designed to treat a variety of eye conditions, many of which do not respond to other forms of treatment.- Design :...

es designed to "compress the steep conical apex thereby correcting the condition". His first lenses were crafted from the bottoms of glass test tube

Test tube

A test tube, also known as a culture tube or sample tube, is a common piece of laboratory glassware consisting of a finger-like length of glass or clear plastic tubing, open at the top, usually with a rounded U-shaped bottom....

s.

Kalt was born in Landser

Landser, Haut-Rhin

Landser is a commune in the Haut-Rhin department in Alsace in north-eastern France.-References:*...

 in the Alsace

Alsace

Alsace is the fifth-smallest of the 27 regions of France in land area , and the smallest in metropolitan France. It is also the seventh-most densely populated region in France and third most densely populated region in metropolitan France, with ca. 220 inhabitants per km²...

region of France.

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