Dr. Hummel - Vision Blog
Thursday, May 8, 2008
How Does PRK Work?
People with steeply curved corneas are severely nearsighted. To be a good candidate for LASIK, your prescription must fall within certain parameters. In other words, the curvature of your cornea must be flat enough that the microkeratome can accurately create that thin flap of surface tissue.
In PRK, instead of creating a flap, the procedure removes some surface cells altogether. The laser then has access to the treatment level it needs, and the surface cells grow back afterwards. The thickness of cells removed is less than the thickness of a flap.
Recovery after PRK is longer, since those cells must regrow. You would wear a bandage contact lens to protect the cornea while it recovered. You would see some instant vision improvement, but the full extent of improvement would not be evident for several weeks.
PRK is an excellent alternative to LASIK. It is actually an older procedure than LASIK, and has stood the test of time well.
posted by Patti at 3:11 PM
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- What Sort of Laser is Used in LASIK?
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