Photorefractive keratectomy: A technique for laser refractive surgery

  title={Photorefractive keratectomy: A technique for laser refractive surgery},
  author={Charles R. Munnerlyn and Stephen J. Koons and John Marshall},
  journal={Journal of Cataract and Refractive Surgery},
ABSTRACT The excimer laser offers entirely new corneal surgery procedures. In this paper, we describe conditions for one such procedure, photorefractive keratectomy, the direct reshaping of the cornea's central optical zone using tissue ablation with far ultraviolet radiation. We present equations for the required tissue ablation to achieve required refractive corrections. Conditions for beam uniformity are presented and a method of achieving better beam uniformity using beam integration by… Expand
Results of excimer-laser-performed photorefractive keratectomy operations
We have performed excimer laser photorefractive keratectomy operations with a Schwind Keratom 2F to correct near- sightedness. 613 eyes of 348 patients were treated by this ablation method. We haveExpand
Laser Refractive Surgery: Technological Advance and Tissue Response
Photorefractive keratectomy (PRK) and laser assisted in situ keratomileusis (LASIK), using an excimer laser, are the currently popular techniques of correcting refractive errors. Since theseExpand
Excimer laser photorefractive surgery of the cornea
  • R. Gaster
  • Materials Science, Engineering
  • Other Conferences
  • 1998
The 193 nm argon fluoride (ArF) excimer laser can effectively be used to change the radius of curvature of the cornea and thus alter the refractive state of the eye. This change allows myopicExpand
Excimer laser photorefractive keratectomy.
The nature of the excimer laser-tissue interaction, and clinical outcomes of predictability, stability and complications of surgery for myopia are discussed in detail. Expand
Excimer laser delivery system for astigmatic and hyperopic photorefractive surgery
  • R. Beck, W. Foerster
  • Materials Science, Engineering
  • Photonics West - Lasers and Applications in Science and Engineering
  • 1994
Ablation of corneal tissue with excimer laser light is an effective way to correct refractive errors of the eye. For this purpose a beam-stop (iris diaphragm or interchangeable masks) is illuminatedExpand
Axicon: a new laser beam delivery system for corneal surgery
A new laser beam delivery system using axicon beam shaping has been designed to produce controllable surface ablation as well as trephination for the corneal surgery. Noncontact cornea trephinationExpand
Excimer laser treatment of corneal surface pathology: a laboratory and clinical study.
Multiple zone excimer laser superficial keratectomy is considered the treatment of choice for rough, painful corneal surfaces and ablation of a single axial zone is recommended and results in improved visual acuity and reduction of glare. Expand
New Developments in the Lenticule Extraction Procedure
For the last 20 years controlled excimer laser ablation of corneal tissue, either directly from the corneal stromal surface or from the corneal interior after creation of a superficial corneal flap,Expand
The Optics of LASIK in the New Millennium
The most important issues regarding the optics of refractive surgery are addressed, including aberrations and how they may be corrected. Expand
Excimer laser phototherapeutic keratectomy.
  • C. Rapuano
  • Medicine
  • Current opinion in ophthalmology
  • 2001
Irregular astigmatism, which is not treated very well with current PTK techniques, may be addressed better with newer approaches, such as selective zonal ablation and the use of BioMask. Expand


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Applying the far-ultraviolet light in short intense pulses permitted us to control the depth of the incision with great precision and it was found that 1 joule/cm2 ablates corneal tissue to a depth of 1 micron. Expand
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Far ultraviolet light (193 nm) produced by an excimer laser has been used to produce a variety of incisions in the corneas of anaesthetised rabbits. Tissue was lost from the site of irradiation butExpand
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Corneal grinding is suggested as treatment of refractive errors. The design and the construction of an experimental tool are described; in preliminary experiements the centres of the corneas ofExpand
A limited number of papers have been reviewed; thus many significant contribu¬ tions in other areas of research on the cornea and sclera have been omitted. Expand
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