What is LASIK, and has anyone uder gone this procedure to correct their vission?

Answer 1

LASIK, an acronym for Laser-Assisted in Situ Keratomileusis, is a form of refractive laser eye surgery procedure performed by ophthalmologists intended for correcting myopia, hyperopia, and astigmatism.[1] The procedure is usually a preferred alternative to photorefractive keratectomy, PRK, as it requires less time for full recovery, and the patient experiences less pain overall. Many patients choose LASIK as an alternative to wearing corrective glasses or contact lenses.

Preoperative
Patients wearing soft contact lenses typically are instructed to stop wearing them approximately 7 to 10 days before surgery. One industry body recommends that patients wearing hard contact lenses should stop wearing them for a minimum of six weeks plus another six weeks for every three years the hard contacts had been worn. [2] Before the surgery, the patient's corneas are examined with a pachymeter to determine their thickness, and with a topographer to measure their surface contour. Using low-power lasers, a topographer creates a topographic map of the cornea. This process also detects astigmatism and other irregularities in the shape of the cornea. Using this information, the surgeon calculates the amount and locations of corneal tissue to be removed during the operation. The patient typically is prescribed an antibiotic to start taking beforehand, to minimize the risk of infection after the procedure.


[edit] Operation
The operation is performed with the patient awake and mobile; however, the patient typically is given a mild sedative (such as Valium) and anesthetic eye drops.

LASIK is performed in two steps. The first step is to create a flap of corneal tissue. A corneal suction ring is applied to the eye, holding the eye in place. The step in the procedure can sometimes cause small blood vessels to burst, resulting in bleeding or subconjunctival hemorrhage into the white (sclera) of the eye, a harmless side effect that resolves within several weeks. Increased suction typically causes a transient dimming of vision in the treated eye. Once the eye is immobilized, the flap is created. This process is achieved with a mechanical microkeratome using a metal blade, or a femtosecond laser microkeratome (procedure known as IntraLASIK) that creates a series of tiny closely arranged bubbles within the cornea.[3] 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 process of lifting and folding back the flap can be uncomfortable.

The second step of the procedure is to use an excimer laser (193 nm) to remodel the corneal stroma. The laser vaporizes tissue in a finely controlled manner without damaging adjacent stroma by releasing the molecular bonds that hold the cells together. No burning with heat or actual cutting is required to ablate the tissue. The layers of tissue removed are tens of micrometers thick. Performing the laser ablation in the deeper corneal stroma typically provides for more rapid visual recovery and less pain.

During the second step, the patient's vision will become very blurry once the flap is lifted. He/she will be able to see only white light surrounding the orange light of the laser. This can be disorienting.

Currently manufactured excimer lasers use an eye tracking system that follows the patient's eye position up to 4,000 times per second, redirecting laser pulses for precise placement within the treatment zone. The energy of each pulse is usually in the milliwatt range [4] Typically, each pulse is on the order of 10–20 nanoseconds. After the laser has reshaped the stromal layer, the LASIK flap is carefully repositioned over the treatment area by the surgeon, and checked for the presence of air bubbles, debris, and proper fit on the eye. The flap remains in position by natural adhesion until healing is completed.


[edit] Postoperative
Patients are usually given a course of antibiotic and anti-inflammatory eye drops. These are discontinued in the weeks following surgery. Patients are also given a darkened pair of goggles to protect their eyes from bright lights and protective shields to prevent rubbing of the eyes when asleep.

Answer 2

LASIK eye surgery is generally considered to be a safe and effective method of treating near-sightedness, far-sightedness, and astigmatism and millions of people undergo this procedure every year throughout the world.
No surgery is without risks or complications, however, and this must be understood and accepted before making the decision.
The most common side effects of LASIK eye surgery are dry eyes and glare. The incidence of these are debated between proponents and opponents of the surgery. The FDA considers the risks to be low enough to approve the technology required for LASIK (microkeratomes, excimer lasers, etc.)
Safety can be increased by selecting a skilled surgeon using the best technology. Studies show that experience is one of the most important factors in selecting a surgeon.
There is a good San Diego Lasik website. It has lots of info and some very informative Lasik articles. See the links below:
http://www.lasik-surgery-san-diego.info/
http://www.lasik-surgery-san-diego.info/lasik-eye-surgery-san-diego.htm
http://www.lasik-surgery-san-diego.info/lasik-san-diego-north-county.htm
http://www.lasik-surgery-san-diego.info/lasik-san-diego-east-county.htm
http://www.lasik-surgery-san-diego.info/lasik-san-diego-south-bay.htm
http://www.lasik-surgery-san-diego.info/laser-eye-surgery.htm
http://www.inkjet-cartridge-source.com

Answer 3

It is a surgery to reduce your "Number" or power of your glasses. In this, a laser is used to reshape the cornea, therefore reducing the number. While its complication rate was slightly high a few years ago, nowadays, the newer machines are very sophisticated and have good results.

Answer 4

1