Orthokeratology and corneal refractive therapy: a review and recent findings.
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.
Barr
Joseph T
JT
College of Optometry, Ohio State University, Columbus, OH 43210, USA. barr.2@osu.edu
Rah
Marjorie J
MJ
Jackson
John Mark
JM
Jones
Lisa A
LA
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