Laser-assisted in situ keratomileusis, also known as LASIK, is a popular refractive surgery procedure. Both nearsighted and farsighted people undergo LASIK surgery in order to correct their vision. Whether a person is nearsighted and needs their steep cornea flattened or farsighted and needs their cornea steeper, LASIK surgery is helping more and more people improve their vision everyday.
Before receiving LASIK surgery, a candidate must visit an eye doctor in order to be evaluated. Not only will the doctor check to make sure the person does not have dry eye disease, but also how much vision correction they need and whether or not their eyes are healthy enough for the surgery.
During the LASIK surgery, the patient's eyes will be numbed and the doctor will make sure the patient's eyes are directly underneath the laser. The eyes are usually kept open by a retainer. Next, the doctor will create a circular flap in the cornea using either a microkeratome or a femtosecond laser. The device is attached to the patient's cornea with a suction ring so that eye moments do not affect the flap.
There are several choices of lasers the doctor may choose from: slit scanning lasers, spot scanning lasers, or wavefront guided lasers. Slit scanning lasers use small beams linked to a rotational device with slit holes that enlarge. An enlarging ablation zone is form from the laser beams scan across the holes. Spot scanning lasers use small diameter laser beams scanned across the cornea to produce the ablation zone. Wavefront- guided lasers individually guide the way the eye's cornea is reshaped in order to achieve ablation. Whether a doctor uses slit scanning or spot scanning lasers, both are able to be used for wavefront- guided treatments.
In the next part of the procedure, the doctor uses a computer to adjust the laser for the patient's particular prescription. The patient will look at a target light while the doctor watches the patient's eyes through a microscope as the laser sends pulses of light to their cornea. The laser light the patient is receives reshapes the cornea.
When the procedure is finished, the patient will be allowed to rest for a little while. Some people choose to have LASIK surgery on both eyes the same day, while others wait a week before undergoing the procedure again.
Although most patients' vision improves immediately, some have to wait a few days before they see the full benefits of their surgery.
If a patient is worried about the risks that come with LASIK surgery, they should know that it is rare to suffer from any complications. The best way for a person seeking LASIK surgery to decrease their chances of any risks is by picking the right eye surgeon. In fact, less than 1% of patients experience complications after LASIK surgery.
Can The Blind Really See? The Facts About Lasik Surgery
Previous：Buying A Reuge Music Box
No comments:
Post a Comment