By Keith George
 To reduce a persons dependency on glasses or contact lenses one can have Lasik surgery. The term LASIK stands for Laser-Assisted In Situ Keratomileusis and is a procedure through which you permanently changes the shape of the cornea. The cornea is the clear covering of the front of the eye.
Doctors use an excimer laser to perform this kind of surgery. A small knife, called a microkeratome, is used to cut a flap in the cornea. A hinge is left at one end of this flap. The flap is folded back revealing the stroma, the middle section of the cornea. The pulses from a computer controlled laser vaporize a portion of the stroma and the flap is replaced. Other techniques are also in use.
The cornea is a part of the eye that helps focus light to create an image on the retina. The bending and focusing of light is also known as refraction. The shape of the cornea and the eye are usually not perfect and the image on the retina is out-of-focus (blurred) or distorted.
These imperfections in the focusing |
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By Susan Jan
 More and more people with vision problems are turning to LASIK to correct their vision. LASIK, which stands for Laser In Situ Keratomileusis is generally a safe, reliable and painless way to improve vision without the need for glasses or contact lenses. Thanks to new advances in laser technology, LASIK is the most commonly performed refractive surgery procedure that is used to correct refractive errors in the eye, such as moderate to high degrees of myopia or nearsightedness, hyperopia or farsightedness, and astigmatism or distorted vision.
LASIK helps change the shape of the cornea with the use of excimer laser. The knife that is used in the operation to remove a flap in the cornea is called microkeratome. There are several techniques that are employed to reshape the cornea. After the laser has reshaped the cornea, the flap is repositioned over the treatment area by the surgeon.
There are several advantages to this procedure:
* LASIK is considered as one of the greatest ophthalmologic breakthroughs in recent times. Many eye surgeons believe that even the most complicated refractive errors can be treated with the help |
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