title: Orthokeratology and corneal refractive therapy: a review and recent findings.
abstract: OBJECTIVE
  To review the past and current literature and present recent findings on orthokeratology and corneal refractive therapy.
  
  
  METHODS
  Various articles on contact lens corneal reshaping were analyzed. Common clinical procedures and interference measurement of tear-film thickness were also used.
  
  
  RESULTS
  Although the numbers of patients tested to date do not allow conclusions of great certainty, based on a review of the current literature, our recent study of 60 patients, and the Food and Drug Administration approval of overnight contact lens corneal refractive therapy, there is a low incidence of complications, and unaided visual acuity of 20/20 in the morning is possible in most (74%) successful cases. Refractive error change of 2.25diopter (D) +/- 1.00D is common. A presumed iron ring may appear in some patients in the midperipheral corneal epithelium.
  
  
  CONCLUSIONS
  Overnight orthokeratology and corneal refractive therapy with modern design reverse-return zone lenses in high-Dk rigid gas-permeable contact lens materials is an option for transient vision correction for some myopic patients.
authors.affiliation: College of Optometry, Ohio State University, Columbus, OH 43210, USA. barr.2@osu.edu
authors.forename: Joseph T
authors.initials: JT
authors.lastname: Barr
authors.forename: Marjorie J
authors.initials: MJ
authors.lastname: Rah
authors.forename: John Mark
authors.initials: JM
authors.lastname: Jackson
authors.forename: Lisa A
authors.initials: LA
authors.lastname: Jones
mesh_terms: D003261:Contact Lenses; D003315:Cornea / Q000503:physiopathology*; D006077:Government Agencies / Q000331:legislation & jurisprudence; D006801:Humans; D009216:Myopia / Q000503:physiopathology / Q000628:therapy*; D012029:Refraction, Ocular / Q000502:physiology; D014481:United States; D014792:Visual Acuity / Q000502:physiology