September 19, 2014
Laser eye surgery, also termed vision repair surgery, is any surgical procedure used to correct refractive errors or problems with vision. Over the years there has been advancement in this field of laser and refractive eye surgery and numerous patients report positive results with the treatment.
All laser eye surgeries use a similar laser, called an ‘excimer’ laser, which works to reshape the cornea, so that light passing through it is accurately focused onto the retina which is located in the back of the eye.
There are various types of laser refractive surgery and the most common include LASIK, LASEK, PRK AND Epi-LASIK.
LASIK eye surgery that is Laser-assisted in-situ keratomileusis is the most common type of refractive surgery. The procedure corrects certain vision problems, eliminating or reducing the need for specs or corrective lenses.
During the refractive surgery, the vision is corrected by reshaping core corneal tissue whereby a cut is made through the cornea with a mechanical blade so-called a microkeratome and a flap of the tissue (epithelial cells) is raised and with the excimer laser the visible corneal is reshaped and then the flap is replaced.
The eye surgery is used to correct Myopia, hyperopia and astigmatism.
The LASIK surgery has several advantages which include:
- Adjustment can be made over the years to correct vision after this procedure if the vision changes.
- The procedure works and it corrects vision. Analysis have indicated that about 96 percent of patients will have preferred vision after LASIK.
- The vision is amended nearly instantaneously or in a day after the LASIK surgery, also no stitches or bandages are required.
Even though it has its pros the procedure has it downside which may include:
- Once the LASIK procedure has been performed the alterations made to the corneal tissue cannot be reversed.
- The surgery is technically difficult and complications may transpire when the surgeon makes the flap, which may permanently affect vision
Stands for Laser epithelial keratomileusis, it combines the many pros of LASIK and PRK. It begins with the application of alcohol to the corneal tissue which relaxes the remotest corneal cells and lets the doctor to move them out the way, for the laser procedure. The excimer laser is used to reshape the stroma after which the surgeon replaces the segment of epithelial cells. The patient typically wears a bandage or contact lens for about four days to let vision recover, which may take four to seven days. The procedure is suitable for patients with thin corneas.
Short for Photo-refractive keratectomy, which was among the first laser procedures to utilize the excimer laser to reshape the anterior surface of the cornea. Kit is used to correct mild short-sightedness, long sightedness or astigmatism. The same excimer laser is used to reshape the cornea. The ultraviolet beam of light delivered by the laser is used on the external part of the cornea, hence not cutting is required, unlike the LASIK eye surgery where the laser is used beneath a flap of the cornea.
It is a cross between LASEK and LASIK. During the procedure, a flap is cut in the outer part of the cornea, just as in LASEK and LASIK. Though, with the Epi-LASIK procedure the doctor uses a dull, plastic oscillating blade called an epithelial separator, which is used to pickle the epithelial flap across the eye. Next, with the excimer laser the surgeon applies pulses of laser light that sculpts the corneal tissue underneath and the epithelial flap is positioned back on the eye afterwards and special lenses are placed on the eye keep the epithelial flap in place while it recovers. The recovery takes a week or two for some patients, while some patients take four to six months to reach good vision.