Over the last 250 years, techniques of correcting the optical
impairments of the eye have been limited to nearsightedness or
farsightedness, and to the cylindrical refractive errors, mainly by
glasses or contact lenses.
Within the last decade, laser vision correction has become a standard
of care for correcting patient’s eyesight. Commonly used is the so
called laser in situ keratomeleusis (LASIK), where a flap is cut in the
cornea and folded back to expose the corneal stroma to an ablating
excimer laser beam. After the treatment the flap is repositioned to
cover the corneal wound.
The most attractive solution of correcting vision is by personalized
refractive surgery. Here, corneal tissue is individually ablated using
a laser beam. This treatment is based on the measured unique wavefront
aberrations to permanently reduce the refractive errors of the
individual patient's eye.