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   The Wavefront-Guided procedure is used for LASIK and PRK. All of the Wavefront-    guided procedures were approved by the FDA for LASIK. They can be utilized with    PRK, but this represents an “Off Label Use" of the laser.

   Procedure is used with LASIK and PRK in treatment of:

   · Nearsightedness
   · Farsightedness
   · Astigmatism
   · Presbyopia (Monovision)

   One of the most exciting advances in the field of refractive surgery involves the    application of Wavefront testing to the human eye. The basis of Wavefront testing is    from the field of adaptive optics, used for years by astronomers to build better lens    systems for improving the optics of telescopes.

   The human eye has two bread categories of aberrations, lower order and higher order.    Lower order aberrations represent the patient’s prescription for glasses. There are    many higher order aberrations but the two most important ones for potential LASIK    patients are spherical aberration and coma. When these two aberrations are increased    above preoperative levels, patients may notice more problems with the quality of their    night vision and be more aware of halos, starbursts, flare, and glare.

   Conventional laser eye surgery (LASIK and PRK) for years was excellent at reducing or    eliminating the lower order aberrations and most patients obtained satisfactory    uncorrected vision, usually near 20/20. However, conventional laser eye surgery    procedures like LASIK and PRK have often increased the degree of higher order    aberrations, which accounted for the possible increased likelihood of night vision    problems.

   Wavefront-based laser eye surgery measures the amount of both lower and higher
   order aberrations. This information is then used by the excimer laser system for both    LASIK and PRK in an attempt to either reduce or at least minimize the increase of    higher order aberrations. All of the FDA approved laser systems for LASIK and PRK    now offer this type of treatment, so that each patient’s optical system is measured    more accurately than ever before, producing in effect a unique “finger print” of their    pre-operative visual problems. This truly customized treatment plan is then    implemented in the laser eye surgery (LASIK, PRK) for each patient.

   This Wavefront fingerprint enables the laser eye surgeon to program the laser in order    to obtain the best results for the laser eye surgery that is best for you. By using    Waverfront testing, there is a possibility that your existing higher order aberrations may    not increase at all, and some patients report that they can see even better than they    did with glasses or contact lenses. This is known as a "gain in best spectacle   corrected  visual acuity". The FDA studies of Wavefront-based treatments in LASIK,   PRK and other laser eye procedures have improved the chance of obtaining 20/20 vision   or better and have decreased the chances of significant night vision problems (due to   higher order aberrations).

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