The term »excimer« is derived from the English
term »excited dimer« (excited molecule) which relates to the influence
a cold laser has on cells.
2.000 years ago, spectacles were used in ancient Europe and
China as mere fashion items. Glasses were first used to improve sight in Arabia
in the 11th century, finding their way to Europe 200 years later.
It was one hundred years ago that surgeons first tried to
correct weak sight by manipulating the cornea. But until the middle of the
20th century, all these efforts failed.
It was not until the 1970s, that the Russian Professor Fjodorow successfully
corrected near-sightedness by making incisions into the cornea, so-called
»radial keratotomy«. However, this method has some disadvantages:
deep scar formation and reduced cornea stability caused by the incision, which
can be as deep as 95% of the cornea's thickness!
New York, June 1983: the new method PRK is born and quickly gains overwhelming
support from specialists around the world. Today, excimer laser treatment
is used to correct far-sightedness, near-sightedness and astigmatism successfully.
Millions of patients have been operated worldwide. Moreover, cornea scars
caused by external influences which seriously impair vision can be erased.