keratomileusis
noun
ker·at·o·mil·eu·sis ˌker-ə-tō-mil-ˈ(y)ü-səs 
: a surgical procedure for correcting the refractive power of the eye to improve vision that formerly involved removing, freezing, reshaping, and reinserting a section of the cornea but now typically involves reshaping the cornea in place with the use of an excimer laser compare lasik
Example Sentences
Recent Examples on the Web Lasik — short for laser-assisted in situ keratomileusis — eliminates the need for glasses by reshaping the cornea, the clear round dome that covers the front of the eye. 
Author: Roni Caryn Rabin, Anchorage Daily News, 12 June 2018 Cutting Nerves Within the Eye Lasik — short for laser-assisted in situ keratomileusis — eliminates the need for glasses by reshaping the cornea, the clear round dome that covers the front of the eye. New York Times, 11 June 2018
Author: Roni Caryn Rabin, Anchorage Daily News, 12 June 2018 Cutting Nerves Within the Eye Lasik — short for laser-assisted in situ keratomileusis — eliminates the need for glasses by reshaping the cornea, the clear round dome that covers the front of the eye. New York Times, 11 June 2018 Word History
Etymology
probably borrowed from Spanish queratomileusis, from querato- kerato- + -mileusis, probably erroneously for Greek smīleúsis "carving," from smī́lē "knife, scalpel" (of uncertain origin) + -eusis, action-noun suffix of verbs ending in -euō, -euein
Note: The word was presumably coined by the pioneer of the surgical procedure, the Spanish-born ophthalmologist José Ignacio Barraquer Moner (1916-98); it occurs in his paper "Queratomileusis para la correción de la miopía," Archivos de la Sociedad Americana de Oftalmología y Optometría, vol. 5 (1964), pp. 27-48.
First Known Use
1978, in the meaning defined above
Medical Definition
keratomileusis
noun
ker·at·o·mil·eu·sis ˌker-ət-ō-mil-ˈ(y)ü-səs
: a surgical procedure for correcting the refractive power of the eye to improve vision that formerly involved removing, freezing, reshaping, and reinserting a section of the cornea but now typically involves reshaping the cornea in place with the use of an excimer laser see lasik