Pronunciation: ' l ā -sik
Function: noun
Etymology: las er-assisted i n situ k eratomileusis
Date: 1994
: a surgical operation to reshape the cornea for correction of myopia, farsightedness, or astigmatism in which the surface layer of the cornea is separated to create a hinged flap providing access to the inner cornea where varying amounts of tissue are removed by an excimer laser