The underground layers of the cornea is completely insensitive to the laser correction is carried out. This, however, have access to the underground strata. The advantage is that only during the surgery, but after the surgery do not have any serious discomfort, pain was expected. Quickly stabilize visual acuity, usually 1-2 days, so there is no impediment to the working life either. The disadvantage is that often, but it is mainly produced by the mechanical mikrokeratom lobe may be due to serious complications. Most modern clinic, therefore, this treatment is not carried out.
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