title: Keratectasia after LASIK but not after PRK in one patient.
abstract: OBJECTIVE
  To report a case of keratectasia in a patient who underwent LASIK in the right eye and photorefractive keratectomy (PRK) in the left eye for correction of compound myopic astigmatism.
  
  
  METHODS
  A 30-year-old man underwent LASIK in the right eye and PRK in left eye for refraction of -1.75 -1.50 x 48 degrees and -1.00 -1.75 x 100 degrees, respectively. Preoperative corneal thickness was 447 microm in the right eye and 446 microm in the left eye.
  
  
  RESULTS
  Postoperative corneal thickness decreased to 341 microm and 384 microm in the right and left eye, respectively. Uncorrected visual acuity in the left eye was 20/20, but the right eye developed keratectasia, which led to severe visual loss (20/400).
  
  
  CONCLUSIONS
  Photorefractive keratectomy may be better than LASIK for ablative refractive surgery for low myopic astigmatism in eyes with low central corneal thickness.
authors.affiliation: Dept of Ophthalmology, Labbafinejad Medical Center, Ophthalmic Research Center, Shaheed Beheshti University of Medical Sciences, Tehran, Iran. ma_javadi@yahoo.com
authors.forename: Mohammad Ali
authors.initials: MA
authors.lastname: Javadi
authors.forename: Mehrdad
authors.initials: M
authors.lastname: Mohammadpour
authors.forename: Hossein Mohammad
authors.initials: HM
authors.lastname: Rabei
mesh_terms: D000328:Adult; D003315:Cornea / Q000473:pathology*; D003316:Corneal Diseases / Q000209:etiology* / Q000473:pathology; D019781:Corneal Topography; D004108:Dilatation, Pathologic; D005500:Follow-Up Studies; D006801:Humans; D020731:Keratomileusis, Laser In Situ / Q000009:adverse effects*; D054018:Lasers, Excimer; D008297:Male; D009216:Myopia / Q000601:surgery*; D018903:Photorefractive Keratectomy / Q000379:methods*; D011183:Postoperative Complications; D014792:Visual Acuity