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In performing LASIK, the surgeon first uses a special instrument called a keratome that makes a partial cut through the front surface of the cornea with extreme precision. This creates a flap of clear tissue over the central part of the eye. The patient is then positioned under the excimer laser which is programmed to vaporize away some of the internal corneal tissue under the flap.
Central tissue is removed to change the curvature and correct nearsightedness. Astigmatism is corrected by removing selected tissue to even out the curvature of the cornea. In addition, farsightedness is corrected by making the central part of the cornea steeper to better focus light on the retina. After the laser has removed the selected tissue, the flap is gently replaced over the eye. The cornea has extraordinary natural bonding qualities that allow effective healing without the use of stitches.
The physicians at Chico Eye Center offer the newest development in LASIK surgery, which is “CustomVue WaveFront” technology. Because your eyes are unique, like a fingerprint, it’s now possible to “map” them much the same way. This “map,” like a blueprint, is then used to customize your LASIK procedure with the greatest precision possible. This new technology, along with our VISX Star S4 laser includes ActiveTrack (infrared eye tracking to maintain centration and fixation even if the patient moves their eye) along with Iris Recognition (orients the laser and compensates for any rotational movement of the eye) to ensure the highest degree of safety, the fewest side effects and the best overall vision. During the procedure, patients remain awake with only the designated eye anesthetized with drops. Good vision is often possible on the day following the surgery. Prescription eye drops are used for approximately one week. Lubricating drops need to be used longer. Protective eye shields are recommended while sleeping during the first several nights to protect the flap.
The first LASIK procedure was done in 1990 in Italy and Greece. The first US procedure was done in 1991, but was not FDA approved in the US until 1998. Risks and Side EffectsLASIK is a proven and safe surgical technique. However, as with any surgical procedure there are certain risks that prospective patients need to be aware of. Although most surgeries proceed without incident, your surgeon will discuss possible risks, including but not limited to those listed below. Operative Risks:
Post-Operative Risks:
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