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Laser Vision Correction
Everyone is talking about LASIK. Here is a brief description of the procedure.
A flap is cut in the cornea and then the flap is gently folded back. An Excimer Laser is used to reshape the cornea, much like a contact lens forms a new shape on the cornea, only the laser is permanent. The flap is then put back in place, acting like a natural bandage.
The "Wow!" effect of Lasik is the very rapid recovery of vision and the decreased level of discomfort post-operatively. You hear from people that they did not feel anything, and could see well the very first day. Most people have functional vision in 24-48 hours, although this is true in some cases, it must be noted that each person will heal at a different rate. Vision, although greatly improved immediately after surgery, continues to improve for some weeks, even months.
Everyones eyes are different. Even though you may have had a friend who has had LASIK, it does not mean it is right for you. If you are interested in laser vision correction, we will be happy to guide you in picking the right surgeon, procedure and laser appropriate for you. For many of you who are long-term contact lens wearers my pre-operative input can make the difference between an excellent result and a mediocre one.
Post-operatively we can monitor your eyes, and taper medications to arrive at the best possible result. After all, no one knows your eyes better than your Optometrist.
Here are the 3 types of Laser Vision Correction:
LASIK (Laser Assisted In-Situ Keratomileusis)
In the LASIK procedure, an instrument called a keratome is used to create an ultra thin flap (about the thickness of a human hair) on the outer surface of the cornea, so that the excimer laser can then be used to re-shape the underlying corneal tissue as needed. The result is a dramatic improvement in your vision.
PRK (Photo-Refractive Keratectomy)
With PRK, the surface cells that provide a protective layer to the eye's cornea (the epithelium) is first removed by the surgeon and then the excimer laser is used to remove a predetermined amount of tissue. LASIK has replaced PRK as the laser procedure of choice for most patients today, but not everyone one can have LASIK. We can help you to determine which procedure is best for your visual needs.
ASA (Advanced Surface Ablation)
In the ASA procedure, "Modern PRK", the outer layer of the cornea, called the epithelium, is brushed off. The Excimer Laser is then used to reshape only the outermost layer of the cornea. Unlike LASIK, this procedure uses no keratome and no incision is made in the cornea. The epithelium reforms in a few days to continue to provide its protective function.
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