ˈlāsik noun
( -s )
Etymology: las er-assisted i n situ k eratomileusis (surgical reshaping of the cornea, from New Latin, irregular from kerat- + Greek smileusis carving, from smilē knife, lancet) — more at smith
: a surgical operation to reshape the cornea for correction of nearsightedness, 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 followed by replacement of the corneal flap