title: Glare and halo phenomena after laser in situ keratomileusis.
abstract: OBJECTIVE
  To simulate and measure subjectively observed glare and halos after laser in situ keratomileusis (LASIK).
  
  
  METHODS
  University of Vienna, Medical School, Department of Ophthalmology, Vienna, Austria.
  
  
  METHODS
  In 16 eyes of 10 patients, the best corrected visual acuity (BCVA) and subjectively observed glare and halo size under mesopic conditions were measured before LASIK and 1, 3, and 6 months postoperatively. Infrared pupillography was used to ensure that all patients had a larger ablation zone than the measured pupil size under mesopic conditions.
  
  
  RESULTS
  Preoperatively, the mean Snellen BCVA was 0.88 +/- 0.17 (SD) and the mean glare and halo size was 1.97 +/- 1.20 square degrees (sqd) before the treatment. One month after LASIK, the BCVA was 0.83 +/- 0.29 and the mean glare and halo size, 2.61 +/- 3.14 sqd. Three months after LASIK, the mean values were 0.90 +/- 0.26 and 1.88 +/- 2.37 sqd, respectively. Six months after LASIK treatment, they were 0.85 +/- 0.28 and 1.30 +/- 1.63 sqd, respectively. The 95% confidence interval for the difference between preoperative glare and halo and glare and halo at 6 months was -1.56 to + 0.51 sqd.
  
  
  CONCLUSIONS
  Subjectively observed glare and halo size after LASIK reached a peak after 1 month and decreased in the following postoperative period.
authors.affiliation: University of Vienna, Medical School, Department of Ophthalmology, Vienna, Austria. bridgit.lackner@akh-wien.ac.at
authors.forename: Birgit
authors.initials: B
authors.lastname: Lackner
authors.forename: Stefan
authors.initials: S
authors.lastname: Pieh
authors.forename: Gerald
authors.initials: G
authors.lastname: Schmidinger
authors.forename: Georg
authors.initials: G
authors.lastname: Hanselmayer
authors.forename: Christian
authors.initials: C
authors.lastname: Simader
authors.forename: Andreas
authors.initials: A
authors.lastname: Reitner
authors.forename: Christian
authors.initials: C
authors.lastname: Skorpik
mesh_terms: D000328:Adult; D001251:Astigmatism / Q000601:surgery*; D005260:Female; D019466:Glare; D006801:Humans; D020731:Keratomileusis, Laser In Situ / Q000009:adverse effects*; D008297:Male; D008875:Middle Aged; D009216:Myopia / Q000601:surgery*; D011183:Postoperative Complications; D011446:Prospective Studies; D014786:Vision Disorders / Q000209:etiology* / Q000503:physiopathology; D014792:Visual Acuity