title: [Correction of irregular astigmatism using excimer laser MEL 70 G-Scan with the TOSCA program--introductory report].
abstract: OBJECTIVE
  The purpose of this study was to evaluate changes of the corneal curvature as a result of excimer laser ablation using the TOSCA and TSA system.
  
  
  METHODS
  At the First Department and Clinic of Ophthalmology, Silesian Medical School in Katowice, 8 patients (8 eyes) with the II and III degree of keratoconus according to the Amsler scale, including 4 women (4 eyes) and 4 men (4 eyes), were classified for the excimer laser surgery with the method of PRK with TOSCA program and TSA system with MEL 70 G-Scan (Asclepion-Meditec). The eyes did not tolerate contact lenses at all or because of peripheral location of the keratoconus. The patients were from 18 to 42 years of age (the mean age was 25.8 years). The observation period was 4 weeks.
  
  
  RESULTS
  According to the statistical results lack of correlation between the height of the absolute corneal curvature at the keratoconus and the achieved change after the surgery was reported. The improvement of patients absolute visual acuity was improving and reached 0.2 of the unit.
  
  
  CONCLUSIONS
  To sum up, we can say that the favourable effect of decreasing the irregular corneal astigmatism with the method of laser fotoablations with topography-controlled system was maintained throughout the whole observation period, which probably allowed to shift in time planned corneal transplantation.
authors.affiliation: I Katedry i Kliniki Okulistyki Slaskiej AM w Katowicach.
authors.forename: D
authors.initials: D
authors.lastname: Wygledowska-Promieńska
authors.forename: I
authors.initials: I
authors.lastname: Zawojska
authors.forename: S
authors.initials: S
authors.lastname: Gierek-Ciaciura
authors.forename: A
authors.initials: A
authors.lastname: Sarzyński
mesh_terms: D000328:Adult; D001251:Astigmatism / Q000145:classification / Q000209:etiology / Q000628:therapy*; D003315:Cornea / Q000473:pathology*; D019781:Corneal Topography; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007640:Keratoconus / Q000150:complications* / Q000601:surgery*; D054018:Lasers, Excimer; D008028:Light Coagulation; D008297:Male; D018903:Photorefractive Keratectomy; D016896:Treatment Outcome; D014741:Video Recording; D014792:Visual Acuity