title: Unilateral ectasia after LASIK in a patient with abnormal topography but normal tomography.
abstract: OBJECTIVE
  To report a case of unilateral ectasia developing after LASIK in a patient with abnormal topography but normal tomographic indices.
  
  
  METHODS
  Case report and literature review.
  
  
  RESULTS
  A patient was treated bilaterally for myopia using LASIK. Five years and 5 months postoperatively, unilateral ectasia in the right eye was diagnosed. Preoperatively, anterior curvature (Placido) map of the right cornea showed an asymmetry with 1.8 diopters of steepening when evaluated from upper left to lower right meridians, and a skewing of the steepest radial axes. The calculated KISA% index was 128.4 in the right eye and 5.6 in the left eye. Conversely, posterior elevation map and pachymetry map of the right eye showed no frank abnormalities.
  
  
  CONCLUSIONS
  This case is interesting because it shows that for this patient, the anterior curvature (Placido) map was more sensitive to detect cornea at risk of post-LASIK ectasia than the tomographic features
authors.affiliation: Department of Cataract and Refractive Surgery, Rothschild Foundation and the Center for Expertise and Research in Optics for Clinicains, Paris, France. emmanuel.guilbert83@gmail.com
authors.forename: Emmanuel
authors.initials: E
authors.lastname: Guilbert
authors.forename: Alain
authors.initials: A
authors.lastname: Saad
authors.forename: Damien
authors.initials: D
authors.lastname: Gatinel
mesh_terms: D000328:Adult; D003315:Cornea / Q000601:surgery*; D003316:Corneal Diseases / Q000209:etiology*; D063171:Corneal Pachymetry; D019781:Corneal Topography; D004108:Dilatation, Pathologic / Q000209:etiology; D006801:Humans; D020731:Keratomileusis, Laser In Situ; D054018:Lasers, Excimer / Q000627:therapeutic use*; D008297:Male; D009216:Myopia / Q000601:surgery*; D011183:Postoperative Complications; D041623:Tomography, Optical Coherence