title: [Photorefractive/photo-astigmatic refractive keratectomy in low myopia and myopic astigmatism. Broad beam versus scanning spot laser technology].
abstract: OBJECTIVE
  The results of photorefractive/photoastigmatic refractive keratectomy (PRK/PARK) were compared between two patient groups treated consecutively with either broad-beam or scanning-spot technology.
  
  
  METHODS
  PRK/PARK was performed with a broad-beam excimer laser VISX 20/20 in 46 eyes and with the scanning-spot laser system Keracor 217 in 49 eyes. Preoperative spherical equivalent (subjective manifest refraction) was < or =-6.0 diopter in both groups. Safety, efficacy, predictability, stability, and complications were investigated after 1,4 and 12, months postoperatively.
  
  
  RESULTS
  In the broad-beam laser group no eye lost two or more lines of best-corrected visual acuity;in the scanning-spot laser group one eye lost two lines 12 months postoperatively. Efficacy, predictability, and stability were comparable between the two groups.
  
  
  CONCLUSIONS
  Both the broad-beam and the scanning-spot laser provided good results after PRK/PARK for low myopia and myopic astigmatism. This study found no fundamental differences between the two laser systems.
authors.affiliation: Johann Wolfgang Goethe-Universität, Zentrum für Augenheilkunde, Frankfurt am Main.
authors.forename: G W
authors.initials: GW
authors.lastname: Steinkamp
authors.forename: G
authors.initials: G
authors.lastname: Wellermann
authors.forename: E M
authors.initials: EM
authors.lastname: Schnitzler
authors.forename: M
authors.initials: M
authors.lastname: Baumeister
authors.forename: C
authors.initials: C
authors.lastname: Ohrloff
authors.forename: T
authors.initials: T
authors.lastname: Kohnen
mesh_terms: D000328:Adult; D001251:Astigmatism / Q000601:surgery*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D054018:Lasers, Excimer; D008297:Male; D008875:Middle Aged; D009216:Myopia / Q000601:surgery*; D018903:Photorefractive Keratectomy / Q000295:instrumentation*; D012029:Refraction, Ocular; D016896:Treatment Outcome
vernacular_title: Photorefraktive/photoastigmatisch-refraktive Keratektomie bei niedriger Myopie und myopem Astigmatismus. Broad-beam versus Scanning-spot-Lasertechnologie.