Relex Smile

relex smile

Small incision lenticule extraction (SMILE), originally called Femtosecond lenticule extraction (FLEx), is a form of laser based refractive eye surgerydeveloped by Carl Zeiss Meditec used to correct myopia, and astigmatism. Although similar to LASIK laser surgery, the intrastromal procedure is novel in that it uses a single femtosecond laser referenced to the corneal surface to cleave a thin lenticule from the corneal stroma for manual extraction. It has been described as a painless procedure. For candidates to qualify for this treatment, they have their corneal stroma thickness checked to make sure that post operative thickness won’t be too thin.

The lenticule to be extracted is accurately cut to the correction prescription required by the patient using a photodisruption laser-tissue interaction. The method of extraction can be via a Lasik type flap, but more recently a flapless technique makes a small tunnel incision in the corneal periphery. Currently in the US the procedure is only approved for nearsightedness.

iranian surgeryAfter the femtosecond laser has separated the lenticule, a blunt spatula is inserted through the incision between the lenticule and the stroma and carefully rotated to ensure that the lenticule is completely detached prior to removal by forceps. The procedure has been described as safe and predictable in treating myopia and astigmatism. Some theoretical advantages are that the technique is minimally invasive compared with other flap based treatments and no collateral damage occurs to surrounding tissue due to the high speed of the femtosecond laser. There are limited studies on corneal wound healing and inflammatory response after this treatment has been carried out. There is a suggestion that the expression of fibronectin which is associated with wound healing is less in this method compared with femtosecond-LASIK. Because SMILE treatment is relatively new compared with other laser correction treatments, result studies are limited, but postoperative five year (SMILE) outcomes indicate that the results have been stable after 5 years of follow-up. In some cases post operative tear secretion and dry eye syndrome have been observed along with similar post operative complications seen in LASIK surgery.

As lenticule extraction techniques evolve, there is a possibility that extracted lenticules can be cryogenically preserved either for future donation, or re-implantation. Proof of concept has been carried out on primates where lenticules were extracted from monkeys and allogenically transplanted into other monkeys with positive results.

 

10 common question about Relex smile

1Is ReLEx Smile Safe?
ReLEx SMILE has been established to be a safe and accurate method of performing laser eye surgery . For a certain sub-group of patients with dry eyes and other corneal surface issues, ReLEx SMILE may provide a better outcome.
2How does ReLEx smile work?
How does ReLEx smile work? A Lasik procedure used to involve cutting a flap and folding it back to remove corneal tissue point by point. On the other hand, ReLEx smile eye surgery is minimally invasive and makes laser vision correction possible without the need for a corneal flap.
3Which is better Lasik or smile?
SMILE is a less invasive laser eye surgery procedure than LASIK. During a LASIK procedure, your surgeon creates a flap that is 20mm in circumference. A PRK procedure creates an 8mm diameter surface removal. In comparison, SMILE creates only a 3mm corneal key-hole incision.
4Is ReLEx smile FDA approved?
The FDA has issued premarket approval for ReLEx SMILE to treat myopia with astigmatism, Zeiss announced in a press release. The procedure, which is performed with the VisuMax femtosecond laser, may be potentially less disruptive to corneal surface tissue due to a small entry incision.
5How long does ReLEx smile last?
Now, officially it takes up to six months for your eyes to stabilize entirely and the process is a bit different for everyone. Some ReLEx-smile side effects you might experience are: clear sight one moment and blurriness the next.
6Is ICL better than Lasik?
No serious complications occurred in either series. CONCLUSIONS: The ICL was safer and more effective than LASIK and seems to be a viable alternative to corneal refractive excimer surgery in the treatment of low myopia.
7Does ReLEx smile correct astigmatism?
ReLEX SMILE surgery, the most significant advance in laser eye surgery in the last 10 years, is now FDA-approved for patients with astigmatism. ... That number increases up to 70% now that the ReLEx SMILE procedure is approved for astigmatism.
8Can ReLEx smile be done twice?
Can ReLEx Smile be done twice? If yes, how, and under what conditions? Not at present. Currently, the only option to do a second procedure on an eye with previous Smile is backtrack to 40 year old technique and do PRK.
9Is smile eye surgery painful?
The claim SMILE is associated with less dry eye probably has no meaning in reality. ... In recent studies(2,3) patients undergoing this procedure, on average actually had fewer dry eye symptoms after surgery than before! 4) SMILE is just as safe and accurate as LASIK. This is claimed by SMILE enthusiasts.
10How long does it take for eyes to stabilize after smiling?
While most people can see well the next day, it generally takes a few weeks for your vision to stabilise. Make sure to keep water away from your eyes for a couple of days and avoid rubbing your eyes for a few weeks. You will be able to return to work and resume driving 2 to 3 days after surgery.

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