Güell JL (ed): Cataract. ESASO Course Series. Basel, Karger, 2013, vol 3, pp 116–128 DOI: 10.1159/000350913
Laser Corneal Refractive Surgery: An Update Daniel Elies · Jose L. Güell · Paula Verdaguer · Oscar Gris · Felicidad Manero Instituto Microcirugía Ocular, Universidad Autónoma de Barcelona, Barcelona, Spain
Introduction
Lamellar corneal surgery for the correction of refractive errors has been evolving for more than 60 years. LASIK (laser-assisted in situ keratomileusis) is a well-known procedure for correction of different refractive defects as myopia, hyperopia and astigmatism. It is the most widely used refractive surgical technique due to its safety and effectiveness, quick visual recovery, and minimal side effects. The introduction of wavefront-guided laser technology into the field of refractive surgery in 1999 rep resented a significant advancement in ophthalmology, allowing an optimized correction not only of spherocylindrical errors but also of higher-order aberrations. Femtosecond lasers were introduced in the place of mechanical microkeratomes, and in the past few years have rapidly become accepted as a safe and effective way to create flaps for LASIK, various corneal transplant confi gurations, and intracorneal channels for treating ectatic corneal disorders. The ultimate goal has been to create an intrastromal lenticule that can be removed in one piece manually, thereby avoiding the need for photoablation by an excimer laser. The results of the first prospective trials of this technique have been reported. Copyright © 2013 S. Karger AG, Basel
Lamellar corneal surgery for the correction of refractive errors has been evolving for more than 60 years, since Dr. Barraquer began developing lamellar corneal surgery in 1948 [1–4]. Fundamentally, refractive lamellar corneal surgery attempts to remove, add, or modify the corneal stroma so that the radius of curvature of the anterior corneal interface is changed as desired. LASIK (laser-assisted in situ keratomileusis) is a well-known procedure for correction of different refractive defects as myopia, hyperopia and astigmatism [5, 6]. Current LASIK uses a hinged flap avoiding corneal instability; it precisely sculpts the stromal bed, sidestepping the pain, corneal haze and regression. Principles, Techniques and Results
LASIK is typically performed in two stages and with two laser platforms: flap creation with a microkeratome or femtosecond laser followed by stromal refractive ablation with the excimer laser.
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Abstract