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Keratomileusis
Keratomileusis is the surgical improvement
of the refractive state of the cornea. It is performed by lifting
the front surface of the eye by forming a thin hinged flap under
which the shape of the cornea is changed by using an excimer laser
or other surgical device.
A microkeratome is usually used to cut the
flap, but a femtosecond laser can also be used to make
the flap. Before the advent of the excimer laser, keratomileusis
was performed using a cryolathe, which froze thin flaps of corneal
tissue and lathe cut them much like one cuts the lens of a pair
of glasses.
After thawing, these reshaped flaps were placed
under the front flap to correct visual improvement. LASIK
is currently the only commonly performed keratomileusis procedure.
