For nearly 20 years, Lasik and prk eye surgery has become the gold standard in myopia surgery. Appeared after the PKR (or surface excimer laser), Lasik first appeared as an alternative to this technique for high myopia since the reasonable limit of the PKK was at the time around 6 diopters, a limit beyond which the PKR was less precise and involved more risk of under-correction but also scar veil in the thickness of the cornea.
The excellent results of Lasik, with, in particular, the speed of recovery and the painless nature beyond the first 3 or 4 hours, quickly allowed him to “nibble” the indications of PKR since Lasik also gave very good results in medium or low myopia.
However, the technique of Lasik has evolved a lot since its development, and today there are several types of Lasik, which make it possible to respond to several types of situations. This is the point of a very varied technical platform like the Clinique de la Vision in Paris, offering the choice between several options in each situation.
Lasik in kraff eye institute for example can be defined as a “protected” corneal remodeling: remodeling because the corrective tool for myopia or any other vision abnormality remains the excimer laser in Lasik, the same laser used in PKR. Protected because the cornea remodels were done under a corneal flap of about 110 microns, previously cut.
The first Lasik called for a microkeratome, that is to say, a very sophisticated micro-plane capable, thanks to a round trip on the cornea, of cutting out this corneal flap, commonly called a flap. Modern Lasik techniques are all-laser because these microkeratomes have been gradually abandoned in favor of a tool that has revolutionized Lasik: the femtosecond laser.
This laser, which today has many other applications in refractive surgery, is the instrument that performs the first part of Lasik in the all-laser mode. Its advantages over the microkeratome are its precision and its safety, making the rare, but sometimes serious, incidents related to cutting the flap virtually disappear.
The excimer laser, a second-phase instrument, has also evolved considerably over the past 20 years, and today there are several types of treatment profiles adapted to different situations. Two particular profiles deserve to be known. The first is the so-called “tissue saving” profile, useful, as its name suggests, to limit the extent of corneal thinning when operating on a cornea of average thickness, with significant foreseeable thinning due to the high level of myopia. The other profile corresponds to the “personalized treatment,” also called “aberrometry treatment,” whose essential indication is the existence of astigmatism to be corrected. The “basic” treatment profile retains all its interest in simple myopia, but the other profiles, which represent a slight additional cost,
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