The nurse clarifies that the difference between a photorefractive keratectomy (PRK)and a laser in-situ keratomileusis (LASIK)is that a LASIK:

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LASIK involves creating a flap in the cornea to then reshape the underlying corneal tissue with a laser, effectively removing some internal layers of the cornea to correct vision. This differs from PRK, which reshapes the cornea's surface without creating a flap.

The Nurse Clarifies That the Difference Between a Photorefractive Keratectomy