Posts Tagged ‘flap’
Laser eye surgery has arrive a long way from the early days of the treatment. But regardless of a large deal of think about being taken by surgeries to make it a protected method, difficulties can still arise.
The most general type of laser eye surgery is LASIK, but all types are voted for out by a laser which reshapes the cornea and eliminates some corneal tissue to change the focussing power of the eye.
People must take probable complications into consideration and make an acquainted conclusion about whether to get laser eye surgery.
Major Complications asoociated with Laser Eye Surgery Flap Damage or Loss
Instead of conceiving a hinged flap of tissue on the centered cornea, the whole flap could arrive off. If this were to happen it could be restored after the laser treatment. However, there is a risk that the flap could be impaired or lost.
Distorted Flap
Irregular healing of the corneal flap could conceive a garbled corneal form, producing in a decline of best-corrected vision. It should be documented that whereas difficulties of laser eye surgery are uncommon your surgeon should announce you about them former to treatment
Double Vision
Two images emerge when looking through one eye at a time.
Time Glare
Headlight glare when going by car at night.
Night Myopia
This is a inclination for eyes to become more nearsighted at evening, premier to blurry vision. This can be amended by wearing crystal with minus lenses in the dark
Halos and starbursts
This happens when the student enlarges after the treated locality at nighttime.
Vision Blurring
This is when images emerge blurrier after the refractive surgery than before.
Flap Melt
The flap starts to disintegrate and may need surgical intervention.
Flap Dislocation
This is a status in which the corneal flap is not in correct alignment in the corneal bed. This is treated with surgical intervention.
Flap Wrinkles
A foremost or secondary flap dislocation makes flap wrinkles. This is treated with surgical intervention. This is all about complications associated with Laser Eye Surgery. Hope this will help you a lot. Cheers!
Andrew White is a eye care assistant and an expert on eye cure and care, laser eye surgery, lasik eye surgery and other types of eye surgeries. For more information on how to get rid of eye problems visit our website.
Article Source:http://www.articlesbase.com/vision-articles/potential-lasik-complications-can-arise-from-laser-eye-surgery-1656157.html
Read More...
Refractive laser surgery is usually performed for correcting common ailments of the eye such as myopia and astigmatism. All refractive surgeries do not employ the use of laser. Some surgeries such as Radial Keratotomy (RK) do not employ laser although they are equally effective in curing refractive ailments of the eye. Some common types of refractive laser eye surgery include Lasik, PRK and LASEK.
Common Method of Refractive Laser Surgery
There are various methods employed for refractive laser eye surgery. These are divided into flab procedures and surface procedures.
* Flap Procedures: In such surgeries, a particular type of blade known as microkeratome is used for cutting a flap in the corneal tissue. The most common example of surgery under this method is called Lasik.
* Surface Procedures: In this process an excimer laser is employed for removing the front portion of the corneal stroma. Unlike the flap method this approach does not require the partial thickness cut in the stroma. Thus differentiating this method of handling the epithelial layer from the flap method. Photorefractive Keratectomy (PRK) and Laser Assisted Sub-Epithelium Keratomileusis (LASEK) are two common examples of surface procedures of refractive laser surgery.
Examples of Refractive Laser Surgery
Lasik: This acronym stands for Laser Assisted In-Situ Keratomileusis. In this surgery, a flap is cut with the help of microkeratome blade. The thickness of such flap could be between 100 to 180 micrometers. The flap is then lifted and an excimer laser is used to remove the targeted tissues from the corneal stroma. The flap is then replaced after the removal of the unwanted tissues.
IntraLasik is another variant of this surgery. In this method the flap is cut with the help of laser. Where a microkeratome blade is used to create the flap, the proceedure is known as “traditional Lasik” in order to differentiate it from other forms of refractive laser surgery.
PRK: Photorefractive Keratectomy (PRK) was widely used for correcting the vision problems before the popularity of Lasik. In this surgery, the paitents recovery time takes longer than with Lasik.
LASEK: It stands for Laser Assisted Sub-Epithelium Keratomileusis and in this surgery, surface methods is used for correcting the vision problem.
The Laser Eye Center of Silicon Valley specializes in refractive laser surgery. This vision correction center specializes in all forms of Lasik, PRK and LASEK refractive laser eye surgeries.
Welcome to Laser Eye Center of Silicon Valley, one of the finest refractive laser surger centers in California.
Article Source:http://www.articlesbase.com/vision-articles/refractive-laser-surgery-1621454.html
Read More...
The most popular eye surgery today is LASIK surgery. It is efficient, fast, very gentle and with few complications. For most people the LASIK surgery can help them no matter if they are nearsighted, farsighted and have astigmatism.
LASIK technique is a further development of the older PRK laser surgery. Both operations are done by removing the outer cornea layer, so the laser can remove the tissue. The difference is that while the PRK eye surgery scrapes the outer layer of the cornea away, the LASIK surgery will cut a flap in the cornea that can bend. After the surgery the flap will be put back again.
The operation itself takes only a few minutes and is completely painless. The eye will be anaesthetized right before the surgery, and most people will not feel any pain at all. Subsequently the flap will be cut and the laser surgery can be made.
The actual operation only takes between 30 seconds and two minutes. A laser specially designed for operating in the eye’s sensitive tissues will be used. After the operation the flap is put back in place.
It is possible to leave the operating room right after the surgery. The eyes may sting a little bit, so it is advised to rest for the rest of the day. A nap can also help.
For most people the sight will have improved right after the operation. It will then stabilize over the next weeks.
After the eye surgery the eyes can feel a little dry. It is therefore recommended to drip them with a little salt water.
All studies indicate that a permanent sight improvement is provided by the LASIK operation. And previous bad eyesight will not return again. But a possible, natural change of sight in the future is not possible to prevent by the operation. So the surgery should not be done before the sight is stable.
The age-related long-sightedness that all people will experience can also not be prevented by a LASIK operation.
Martin Elmer is writing about eye surgery in Laserbehandling. You can read about LASIK, LASEK, LASEK, Wavefront and Aspheric treatment in Lasek operation.
Article Source:http://www.articlesbase.com/vision-articles/everything-about-lasik-surgery-1575230.html
Read More...
As one of the laser vision correction surgeries, Lasik is now commonly applied to address some vision problems. Lasik can always provide a high success rate. What’s the most significant, vision correction from Lasik is permanent so that eyeglasses or contact lenses can be eliminated after the surgery. Most people are attracted by this benefit from Lasik. However, they may not be clear of the detailed process of the surgery.
A lot of factors play a role during a Lasik procedure, including the exact vision problem, skills and experience of the surgeon. The time of the process may slightly vary from one surgeon to another. But Lasik typically costs only five minutes. Before performing the procedure, the surgeon will apply a moderate sedative to the patients on an oral basis.
In addition, the patient will be given anesthetizing eye drops. In this way, no infliction will occur in the patient during the procedure. Only one eye will be treated at a time. The doctor will ask the patient to lie down on the operating table and set the eye below the laser. During the procedure, the eyelids should be kept open, because the surgeon needs to cut a corneal flap.
Before cutting the flap, the surgeon will mark the cornea in order to figure out the flap to be cut. This flap will be marked using an ink marker. The flap is actually very thin on the top of the eye. After the creation of the flap, a laser will be used to reshape the corneal surface.
The laser used to reshape the cornea should be precisely guided by a special computer, which aligns the laser to the exact prescription of the patient. In addition, a microscope is used to monitor the motions of the eye, which stares at a target light during the procedure.
It is quite necessary for a patient to ask someone else to drive him home. The other eye should be treated with another Lasik after a few days.
More related articles:
·A comparison between 30-day contact lenses and LASIK
Firmoo.com is the emerging online optical store selling high quality eyewear, such as prescription eyeglasses (single vision myopic glasses, reading glasses, bifocal and progressive eyeglasses etc.,), prescription sunglasses (with RX tinted lenses), prescription sports goggles. Firmoo guarantees lowest possible price in the market. Firmoo’s return and refund policy makes any purchase risk-free ones.
Article Source:http://www.articlesbase.com/vision-articles/the-process-of-lasik-surgery-1534274.html
Read More...
There have been five major advances in LASIK since it was first invented:
1. The use of eye trackers – The first LASIK procedures required the patient to fixate on a light and that was what was used to center the treatment. The invention of eye tracker technology allows the laser to be programmed to define the location of the pupil and when the treatment is started even if the eye moves, the laser stays centered on the pupil which gives treatments that are correctly centered over the optical portion of the eye.
2. Small spot scanning lasers – The first lasers and ones still in use today use a “broad beam” where the treatment laser beam is as large as the optical zone being treated and astigmatism is corrected by varying the shape of this beam. Although this is effective, there are limitations to the types of shapes that can be created, and the quality of the ablation is limited to the quality of the laser beam. Newer lasers use small scanning spots to shape the front of the eye, and with much lower energy per laser pulse.
3. Wavefront optimized ablations – Originally LASIK was done with a mathematical model to flatten the center of the cornea to correct the refractive error. It was learned that this creates halos, glare, and other optical aberrations that are unwanted, especially in patients with larger pupils. The newer lasers can correct the refractive error but maintain a more natural or prolate shape due to more advanced algorithms for the correction.
4. All laser LASIK – All laser LASIK was initially done using a microkeratome that employs a disposable razor blade to cut the corneal flap, which is the first step in traditional LASIK. By using a femtosecond laser, Intralase, and then others were able to create a flap using a laser which is safer, more predictable, and gives more reproducible results. The razor portion is still used by many centers today, but is the cause of most of the risks of the LASIK procedure.
5. Thin flap LASIK – Initially all LASIK was done with a flap of about 180 microns. This is about 20% of the thickness of the structural cornea (the epithelial skin not counted) in most cases and the thickness was unpredictable due to use of the blade (see reason 4 above). Sometimes the flap was over 200 microns. This can weaken the cornea and lead to complications. The all laser method can make thinner flaps, and over time doctors have moved to “thin flap LASIK” with flaps of about 100 microns and in some cases 90 microns which is half as thick as the original flaps.
BONUS IMPROVEMENT: Although not technically a change in Denver LASIK itself, the diagnostic capabilities have improved since the early days of LASIK making the imaging of the cornea more robust with technologies such as OCT, Wavefront analysis, and posterior surface topography. All of these changes have contributed to making an improvement in LASIK. Recently we have begun to look at corneal hysteresis (CH) which is a measure of corneal strength.
Dr. Dishler is the first doctor to perform LASIK in Colorado, the first doctor to offer blade free LASIK in Colorado, and is a consultant, lecturer, and inventor. He is involved with several FDA studies and answers questions related to laser vision correction online.
Article Source:http://www.articlesbase.com/vision-articles/the-five-most-important-improvements-in-lasik-since-it-was-invented-1514807.html