Pellucid Marginal Degeneration Lasik
Monday, November 30th, 2009
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The specialization of EpiLasik / SUPERLASIK for unique types of eyes
Most people do not have perfect eyes. Perhaps you suffer from myopia, farsightedness or astigmatism, and have a unique eye that makes you a candidate for traditional LASIK surgery. If you do, there are other options, such as superLASIK and EpiLasik.
How does LASIK
Traditional LASIK surgery using an excimer laser, a cold ultraviolet laser that corrects a misshapen cornea. Your cornea is the front surface of the eye that light passes through as he heads to the retina. The light that passes behind the cornea and forms an image on your retina, which is transmitted by the optic nerve to the brain.
If the cornea is deformed, the light rays are bent at the wrong angle, focusing behind or in front of the retina instead of on top of it. This creates problems vision like myopia and hyperopia. Or, if the cornea contains small abnormalities in their circular shape, light rays are received out of focus, which causes blurred vision.
The excimer laser is used to vaporize tiny pieces of corneal tissue, which sets the shape and surface of the cornea. This allows light rays to focus on the retina and you can see clearly.
Role of the corneal flap
Before Dr. Khanna laser beam is applied to the cornea to reshape it, you must cut a small flap on the surface of the cornea and folded back to expose underlying tissue. The laser is directed to the tissue and the flap is replaced. It is cured in several days.
Corneal issues
If your corneas are too thin or too flat, traditional LASIK surgery is not recommended. If the cornea is too thick, the small flap to be cut may not be feasible. A flap that is completely independent does not heal properly, and a flap that does not fold back far enough block the laser. Both will result in a successful procedure.
If the cornea is too flat, eliminating only part of the fabric will flatter your cornea and vision not improve.
SuperLASIK
SuperLASIK The procedure is ideal for anyone who has thin corneas or abnormal and can not subject to standard LASIK surgery. A more secure and stable procedure, mixtures superLASIK PRK and LASIK using a microkeratome epikeratome in place. This device approved by the FDA lifted a constant flap 50 microns, which is even thinner than the flap created with IntraLase.
Moreover, instead of using a solution alcohol-based to loosen the edges of the lid before its edges rise again – as in LASEK – a thin plastic tool called an epithelial separator is used. This instrument is used instead of the solution to alcohol, because alcohol can sometimes cause your skin cells to die. Because these cells are cells surface of the cornea, the eye really needs to grow more of these cells at the edges of the flap cut in order to heal properly.
Because there is no distortions in the design of your cornea, superLASIK provides a safer method of surgical correction of vision for most people between 18 and older. If you have the following conditions can not be a candidate for this procedure:
- Keratoconus
- Degeneration pellucid marginal
- Other diseases of the cornea
- Immunological diseases
- Cataracts (in some cases)
The epithelial separator is somehow a safer, more efficient alternative to traditional LASIK. While improved vision takes longer to EpiLasik, if you have a thin cornea, this procedure is an ideal way to avoid complications.
About the Author
If you or a loved one lives in Los Angeles and has a unique cornea, please contact our Orange County Office to schedule your free vision screening. Orange County ophthalmologist Dr. Khanna can help you find the procedure that is right for you. Please call today.
Patient with Pellucid Marginal Degeneration wearing Scleral lens.