title: Partial flap during laser in-situ keratomileusis: pathogenesis and timing of retreatment.
abstract: OBJECTIVE
  To report the timing of retreatment and clinical outcomes in patients with a partial corneal flap during laser in-situ keratomileusis (LASIK), and to describe the causes of this complication.
  
  
  METHODS
  Retrospective review of case records of four patients (4 eyes) who had a partial corneal flap during LASIK.
  
  
  RESULTS
  The mean age of the four patients was 23 +/- 4.7 years, and mean preoperative spherical equivalent (SE) refraction was -9.1 +/- 3.1 D (range, -5.5 to -13 D). A 160 microns corneal flap was attempted during the initial treatment. Retreatment with a 180 microns corneal flap was performed at a mean of 5.1 +/- 1.6 weeks (range, 4 to 7.5 weeks) after the initial procedure. There were no intraoperative complications during retreatment. Post-LASIK mean SE refraction was -1.0 +/- 1.1 D (range, +0.38 to -2.0 D), after a mean follow up of 19 +/- 15.7 weeks (range, 7 to 42 weeks). Best spectacle-corrected visual acuity decreased in one eye from 6/5 to 6/6 and was maintained in the others.
  
  
  CONCLUSIONS
  LASIK retreatment can be performed as early as one month after a partial flap, if the refraction is stable and a thicker corneal flap is created.
authors.affiliation: Medical and Vision Research Foundations, Chennai, India. MDSAAA35@giasmd01.vsnl.net.in
authors.forename: S K
authors.initials: SK
authors.lastname: Rao
authors.forename: P
authors.initials: P
authors.lastname: Padmanabhan
authors.forename: G
authors.initials: G
authors.lastname: Sitalakshmi
authors.forename: R
authors.initials: R
authors.lastname: Rajagopal
mesh_terms: D000328:Adult; D003315:Cornea / Q000473:pathology* / Q000601:surgery; D003316:Corneal Diseases / Q000209:etiology* / Q000473:pathology / Q000601:surgery; D018450:Disease Progression; D005260:Female; D006801:Humans; D020731:Keratomileusis, Laser In Situ / Q000009:adverse effects*; D008297:Male; D054140:Refractive Surgical Procedures; D012086:Reoperation; D012189:Retrospective Studies; D013524:Surgical Flaps / Q000009:adverse effects* / Q000473:pathology; D013997:Time Factors; D014792:Visual Acuity