Laser-in situ-Keratomileusis

LASIK has been developed from PRK in the early 1990's. LASIK is the combination of a surgical incision (keratomileusis) and laser technique. The incision technique in conjunction with the preciseness of the laser provides for a good predictability of the post-operative result and a quick visual rehabilitation.


  • Nearsightedness up to -10 dpt. max.
  • Farsightedness up to approx. +3 dpt.
  • Astigmatism up to approx. 4 dpt. 

Over 90% of all patients with refractive errors are eligable for the LASIK procedure. Therefore, LASIK is the most used refractive procedure to correct nearsightedness, fearsightedness and/or astigmatism. 

Benefits of LASIK 
  • good predictability 
  • short, painfree procedure
  • both eyes can be treated on the same day
  • good vision can be achieved immediately after surgery 
  • many patients are able to return to work on the day after surgery
  • the corneal surface stays intact
  • the healing takes place on its own within the cornea
  • quick rehabilitation period with very little fluctuation in vision

For fixation purposes, a suction ring is placed on the eye prior to surgery. The eye is put under pressure for a brief period of time.

Preparation of the cornea 
With a precision knife (microkeratome), 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 Femto-LASIK. 

Exposure of the stromal bed of the cornea 
The corneal flap is lifted back like a book cover. 

Application of the laser 
The exposed corneal tissue (corneal stroma) is reshaped according to the refractive error. Nearsightedness is corrected by flattening the center of the cornea. 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, an astigmatism is present, it is corrected by giving the cornea a ball-like shape. 

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 bandaid. 

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