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Description of the method

Laser correction of vision defects has been used for several years as a permanent method allowing the elimination of necessity to wear glasses or contact lenses. Several millions of patients have already benefited from the method.
Such vision defects as myopia, hyperopia, astigmatism and their combinations may be corrected by using an excimer laser beam. The laser's operation is based on the use of photoablation involving removal of subsequent cornea layers with their thickness ranging from 0.5 to 1 micron.

The essence of the surgery is to precisely modify the shape of eye cornea in such as way as to enable light rays getting to the eye to focus on the retina and create a distinct image. Laser beam parameters are set individually for each eye on the basis of the information collected during a patient's qualification examinations. In the case of myopia, the correction results in oblateness of the central part of the cornea surface, while in the case of hyperopia the effect is prolateness of the corneal surface.

Cracow Ophthalmology Centre "ZOOPTICA" " performs laser vision corrections using ALLEGRETTO WAVE excimer laser (see: Allegretto Wave excimer laser), which is the most modern among commonly used lasers. Apart from excellent equipment for obtaining expected results, it is vital to have experienced refractive surgeons.
Qualifications for surgeries and the very vision correction surgeries are performed by Prof. Stanis³awa Gierek-Ciaciura, PhD habilitated and Doctor of Medical Sciences as well as by Dorota Wyglêdowska-Promieñska, PhD and Doctor of Medical Sciences. Their experience in this field of ophthalmology is based on thousands of surgeries performed during the last several years.

Laser vision correction may be carried out using the following methods:

LASIK - LASER IN-SITU KERATOMILEUSIS - is a method which involves creating a flap (with the thickness ranging from 130 to 180 µm), hinging the flap and applying a laser beam onto the stroma. Following the correction of the cornea curvature, the flap is put in place. LASIK method makes it possible to correct greater and more sophisticated defects and operating both eyes at the same time. It also allows a patient to return to his normal routine even on the next day after the surgery, because vision acuity is achieved after a few hours from the surgery and the wound heals without causing any pain.

PRK - PHOTOREPHRACTIVE KERATECTOMY - is a method which involves scrapping off epithelium and modifying its surface layers with the use of a laser beam. It facilitates the correction of minor defects up to 3D. Ophthalmologists recommend a two weeks' break period between surgeries performed on both eyes and it is also possible to operate both eyes at the same time. Following PRK surgery it takes a few days for the cornea to reconstruct epithelium. During this period it is necessary to wear sterile dressing or sterile contact lenses, which are removed after 7 days. A patient gradually regains his vision acuity and recuperation lasts for about two weeks.

LASEK - similarly to PRK procedure, LASEK involves modifying of cornea's surface layer. The difference is that the cornea's surface layer is covered again with the folded epithelium cells. They constitute a natural protection of the operated area and diminish pain of the healing epithelium.

EPILASIK - a procedure involving a creation of corneal epithelium flap with the thickness of 50 - 60 µm, i.e. 2 - 3 times thinner than in the case of LASIK. Owing to this, laser penetration is limited to the outer layer of the stroma and the flap is subsequently put back into place. Strong points of the procedure are quicker healing of the cornea and a risk of post-operative complication lesser than in the case of LASIK.

 

PTK-phototherapeutic keratectomy - this method is used to shape the surface of the corneal after refractory treatment or to remove corneal changes such as: corneal scars, erosin, dystrophy and degeneration, inflammation. An excimer laser is used.

 

 

Last Updated on Tuesday, 22 August 2017 16:54