Frequently asked questions about the LASIK flap

You know that the conclusion of each of the LASIK procedure requires cornea flap.

LASIK flap

But Do You Know ...  
What is the LASIK flap exactly? Why does the LASIK flap is needed? How to create a LASIK flap? What are the LASIK flap for the creation of the recent developments? What are the ideal LASIK Corvette characters? How does LASIK now look better? And what are the LASIK flap complications?
They are some of the most frequently asked questions (FAQ) about the LASIK flap and they can give a clear reply to the more dynamic LASIK surgery today.

LASIK flap is the round strip the outer corneal tissue from the corneal layers based on dissected, but the left one is known as a segment perpendicular to the axis of the hinge attached. The most common location is the nasal hinge (side) or better (upper) position.
The classic technique of LASIK hinge position was usually the excision of the nasal. Today, most LASIK surgeons LASIK flaps created with upper hinges. Bottom-up Corvette then delete this name LASIK: bottom-up.
Bottom-up LASIK technology is more physiologic because blinking helps to keep Corvette drive and contribute to their handicap. The severity of the usually places also boasts the best way to contribute to the improvement.
On the other hand, LASIK surgeons who prefer the classic excision of the nasal hinge valance emphasize hinge, excision of the nasal flap for the establishment of the risk of post-LASIK dry eye. In addition, it is easy to cut the excision of the nasal flap with because many of the microkeratomes is not the eyebrows to obstruct the path of the instrument.
LASIK laser Vision Correction Surgery called "lamellar Refractive Surgery" because it runs in between the layers of cornea. Now it is necessary to disclose the LASIK deeper corneal layers for the excimer laser energy reshapes your cornea, which will improve your Vision.
Conventional LASIK, your surgeon will not be able to use the synchronization program for your hand-held device, known as LASIK microkeratome to create the Corvette. But if all laser LASIK, LASIK, your surgeon will make the Corvette type high energy laser (the IntraLase femtosecond laser or) instead of a blade.
The results of the safety and security of LASIK are excellent, very experienced LASIK Surgeon by the selected patients, the microkeratome. However, the introduction of the IntraLase laser allowed for greater precision and predictability in creating a rain flap LASIK.
In order to ensure the proper and uniform depth of Cut on a regular basis the surfaces of the uniform and an appropriate diameter is perpendicular to the axis of the hinge, which Parker ablation is sufficiently large, as well as the displaced by laser ablation
The dimensions of the Microkeratome Corvette is the variable, because it was created by many factors, such as the anatomisista and the steepness of each individual cornea thickness. On the other hand, the IntraLase laser flap maker to create the LASIK flap surgeon precise measurements.
Bladeless LASIK flap vs. conventional LAISK zipper


An irregular shape and the diameter of the flap
Traditional LASIK flaps usually ranged from 140 to 180 microns thick. This is about one-third of the average of the normal corneal thickness of the cornea is approximately 540 microns thickness.
Today the microkeratomes and IntraLase lasers, which can create thinner blades later with many types of LASIK surgeons prefer the flap thickness 100-130 microns. This change toward a thinner LASIK flaps cause is
Stability and avoid serious Corneal LASIK corneal ectasia complications such as corneal tissue to enlarge the size of the rear of the left untouched (this amount should be at least 250 microns and preferably 300 microns) after LASIK procedure. In order to enable the holders of higher degrees after correction of Medical errors, a thinner LASIK flaps keep the greater the amount of corneal tissue flap for the treatment. The greater the ability to make improvements, so that at a later date if necessary. LASIK recovery time, reduced because of the thinner blades to heal faster. Post-LASIK dry eye syndrome to reduce the risk of damage due to the thinner corneal flaps less nerves.
LASIK usually decorate a diameter of more than 8,0 mm: n nearsightedness and farsightedness over 8,75 mm. LASIK flaps are more larger and required, in the management zone is large; for example, hyperopic LASIK, wavefront or custom mixed astigmatism LASIK. More flap is also useful if LASIK retreatment is expected.
Laser processing at the end of your surgeon replaces the Corvette to its original position and the LASIK procedure is complete. Do not loop is needed now is in place and complies with the underlying corneal tissue of natural mechanisms include the following:
Corneal stroma gluey substance secreted molecules tahmeutta surface tension corneal cells (glycosaminoglycans) pump inlet pressure of the corneal endothelial tissue mechanical zoom
LASIK now Healing process starts immediately when the laser LASIK Surgeon is replaced by the Corvette-after processing. However, the healing process time varies depending on the differences between the individual healing people.
Corvette is usually safe, 2 weeks, and after one month, you can restore all of the activities, including sports. However, if there is a danger to the eye may make a direct impact, you should use protective eyewear (goggles, for example).
Many of the complications associated with LASIK corneal boasts a unique creation. These problems are the free flaps, the thin flaps, incomplete flaps, flap, flap-button lävet and epithelial defects decentration.
However, the improvement of technology and the microkeratome IntraLase laser, LASIK has fallen considerably in those problems.

top 10 questions about LASIK and Corneal thickness

Corneal thickness

Corneal thickness is one of the most important factors to be taken into account when calculating your surgeon if you have a good LASIK candidate. 
Understand why LASIK corneal thickness intraocular surgery is an important one, is assumed to be the most common questions about LASIK and corneal thickness ratio.
The thickness of the cornea normally varies between people with an average of about 550 microns, (which is about 1/2 mm), the Caucasians. It is less the black (520 microns), and even less, to Western Europe.
Corneal thickness is measured by a device known as the pachymeter. The most common method is ultrasound Pachymetry, but specific description of the systems, such as the Orbscan corneal and Pentacam can also be used. The latter systems may provide a representative of the relative thickness of the cornea in different places on the map.
Is not ideal for LASIK corneal thickness. It should, however, you know that LASIK surgery to improve vision, according to the United States Census Bureau, you should have a sufficient number of corneal thickness. This amount depends on the type of Medical error.
It is important to determine the corneal thickness before the LASIK procedure, because the LASIK improves the user's perspective of reshaping your cornea and reshapes it, inter alia by deleting some of the tissues in your cornea. If the cornea is too thin, Visio can vary depending on the quality and the weak.
The depth of ablation excimer laser has been deleted is called the stroma, the middle layer of cornea tissue. If you are shortsighted, depreciation is a user in the middle of the cornea. If you have developed your cornea, from a circle.


Ablation depth depends on the amount of treatment, which in turn depends on the degree of Medical error. Size and the selected parameters in excimer laser are other factors that affect the depth of ablation.
Can we assume that, in General, with a size 6.0 mm, the excimer laser to remove each LASIK for the treatment of the tissues of the diopter of 12 microns.
If you have 4 diopters, correcting shortsightedness to Visio, for example, the depth of ablation should be 4 x 12 = 48 micrometers.
LASIK Surgeon in such a way as to ensure that, when you have created a Corvette and excimer laser corneal tissue when applying the minimum amount is not affected by changes you make to the LASIK procedure. This critical called residual Stromal bed and it is important to maintain the integrity of the user and the strength of the cornea after LASIK procedure and to avoid serious complications such as corneal LASIK ectasia.
When the U.s. food and Drug Administration (FDA) approved LASIK, it is recommended that at least 250 microns thickness should be left to the remainder of the stromal Corvette LASIK surgery pursuant to avoid corneal ectasia.
Currently, most LASIK surgeons prefer to leave the 275-300 microns for the rest of the stromal bed safety and also to add the LASIK enhancement (retreatment), if necessary.
Residual Stromal thickness is calculated by taking the Central corneal thickness before the LASIK flap thickness and by reducing and, in particular, by tilting the calculated ablation depth.
For example, if the Central corneal thickness of 550 microns in thickness flap is estimated to be 160 microns and the depth of ablation-refraction is 60 microns, the thickness of the remaining stromal bed would be 550 – (160 + 60) = 330 microns.
If you have a thin cornea and Refractive error should be corrected, it will not be able to be great to leave at least 250 microns in the stromal bed for the rest of the Corvette.
Sometimes, the surgeon can you solve this problem by creating a thinner flap, which allows more processing is carried out at least 250 microns corneal bed. A thinner LASIK flaps can be created either in the femtosecond laser during the flap Maker IntraLASIK or specific types of microkeratomes conventional LASIK.
If it is not possible to create a thinner LASIK flap, other options such as PRK, LASEK, or Epi-LASIK may be the better option for you.