Thursday, February 24, 2011

What is LASIK?

LASIK is the combination of a surgical incision (keratomileusis) and the laser technique. The incision technique in conjunction with the preciseness of the laser provides for a good predictability and for a quick rehabilitation period for even high refractive errors.

Procedure in 3 steps:

1. Preparation of the cornea

With a precision knife, an incision is placed to create a thin flap of the cornea (0.16 mm). If a laser is used instead of the knife, the procedure is called Intra-LASIK.
The corneal flap is flapped back like a book cover.

2. Application of the laser

The exposed lower corneal tissue is reshaped according to the refractive error. Nearsightedness is corrected by flattening the center of the corneal tissue. For the correction of farsightedness, the ablation takes place in a circle around the periphery of the corneal center. If, in addition to nearsightedness or farsightedness, astigmatism is present, it is corrected by ablation in a manner that the cornea regains a ball-like shape.

3. Closing of the wound

The corneal flap is repositioned back onto the stromal bed. It sticks to the corneal tissue on its own and acts like a band-aid.


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