What procedure uses an excimer laser to remove material under the corneal flap to correct astigmatism, hyperopia, and myopia?

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LASIK is the procedure that uses an excimer laser to remove material under the corneal flap to correct astigmatism, hyperopia, and myopia. AK (astigmatic keratotomy) involves making incisions in the cornea to reshape it for correction of astigmatism, ICL (implantable collamer lens) involves inserting a lens into the eye to correct refractive errors, and ACS (astigmatic correction with symmetric steepening) involves making incisions in the cornea to change its shape and correct astigmatism.

What Procedure Uses an Excimer Laser to Remove Material Under