This paper contains a review of the literature covering history, techniques, patient selection, mode of orthokeratology, current studies of the procedure, and complication of orthokeratology. Orthokeratology is the programmed application of contact lenses to systematically reduce myopia. It is considered to be a controversial procedure because of its questionable efficacy, safety, and the duration of its effects. Key Words: orthokeratology, myopia reduction, corneal modification.
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