Eugène Jean Baptiste Kalt (24 February 1861, Landser, Haut-Rhin – 9 May 1941) was a French ophthalmologist who developed the first known application of a contact lens for the correction of keratoconus. In 1888, he worked on a crude flat-fitting glass scleral lenses designed to "compress the steep conical apex thereby correcting the condition". His first lenses were crafted from the bottoms of glass test tubes.
- Pearson, RM (Sep 1989). "Kalt, keratoconus, and the contact lens". Optom Vis Sci. 66 (9): 643–6. doi:10.1097/00006324-198909000-00011. PMID 2677884.
- "Hard Contact Lenses". The College of Optometrists. Retrieved 2006-08-01.
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