
Orthokeratology (also referred to as Ortho-K, Overnight Vision Correction, Corneal Refractive Therapy and CRT), refers to the creation of gas permeable contact lenses that temporarily reshape the cornea to reduce refractive errors such as myopia, farsightedness and astigmatism. This method can be used as an alternative to eyeglasses, refractive su...
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http://en.wikipedia.org/wiki/Orthokeratology

A method of molding the cornea with contact lenses to improve unaided vision. ... Origin: ortho-+ G. Keras, horn (cornea), + logos, science ... (05 Mar 2000) ...
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http://www.encyclo.co.uk/local/20973

Type: Term Pronunciation: ōr′thō-ker′ă-tol′ŏ-jē Definitions: 1. A method of molding the cornea with contact lenses to improve unaided vision.
Found on
http://www.medilexicon.com/medicaldictionary.php?t=63447

orthokeratology 1. A method of improving unaided vision by shaping the cornea with contact lenses. 2. The use of special hard contact lenses to treat myopia by altering the curvature of the cornea. The lens presses on the center of the cornea; therefore, decreasing the protrusion.
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http://www.wordinfo.info/words/index/info/view_unit/1515/5

Correcting refractive error by the use of contact lenses which change the cornea's shape.
Found on
https://www.encyclo.co.uk/local/22233

a technique for correcting refractive errors in vision by changing the shape of the cornea with the temporary use of progressively flatter hard contact lenses.
Found on
https://www.infoplease.com/dictionary/orthokeratology
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