PRK, LASEK, Epi-LASIK are the alternatives to the classic LASIK to correct vision defects with the laser. The PRK or Photorefractive Keratectomy is the oldest laser procedure for the correction of vision defects such as myopia, hyperopia, or astigmatism. in 1986, a laser was used for the first time in the context of PRK for the removal of the corneal tissue. Local anesthetic eye drops the superficial corneal tissue, which is also called the epithelium, from carefully mechanically from the surgeon. Computer-controlled laser pulses with the excimer laser on the now exposed corneal layer ensure a targeted removal of corresponding corneal tissue, to alter the refractive power of the cornea of the eye. The deeper cell layers of the cornea without prejudice of the PRK.
The treated cornea surface re gene advised himself in a few days by alone. The duration of treatment at drip anesthesia is not more than 5 minutes. The PRK is for the treatment of short-sightedness to-6 diopters and one Curvature of the cornea (astigmatism) used to approx. 3 diopters (a long sightedness should be treated by LASIK). Others who may share this opinion include Jeff Leiden. Within this scope, the postoperative result can predict very well. The PRK adversely assesses the initial wound pain, which can last up to the regression of the Deckschickt of the cornea 3-4 days. Relief creates wearing a therapeutic contact lens here immediately after the surgery.
Also see fluctuations are common in the first 4 to 6 weeks. Recent studies show that the long-term results are stable and comparable with the results of LASIK method after performing a PRK. In the course of the last few years, the PRK was further developed into the LASEK and Epi-LASIK: the LASEK the epithelial (surface layer of the cornea) is by a 20% solution of alcohol from his pad replaced and then pushed back with a small spatula. Then, the corneal tissue is removed according to the thickness of the refractive excimer laser. Then, the epithelium is put back again and to growth of the epithelium This is balanced by a soft contact lens. Through the LASEK method the postoperative discomfort can be reduced significantly. In contrast to the LASEK the epithelium with an alcohol solution from the base at the Epi-LASIK, but clicked it will cast aside carefully with the help of a blunt plastic blade. After the laser on the surface of the epithelium is put back also again to cover the wound. The PRK – LASEK – and Epi-LASIK procedure is an option for imperfect people, where the LASIK or Femto LASIK method due to a thin cornea not in question comes. Despite the postoperative higher discomfort or pain are long term with similar good results compared to the classic LASIK to the count. BLU Meditravel Mathias Weber