Additionally, the development of new base materials for rigid gas permeable lenses which provided much higher levels of oxygen permeability opened up the possibility of orthokeratology becoming an overnight procedure rather than being used for daytime wear alone. Finally, the introduction of computer-controlled …
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Dr. Gary Heiting explains orthokeratology (ortho-k) and corneal refractive therapy (CRT) overnight contact lenses for myopia. … Ortho-k lenses are also called " corneal reshaping contact lenses" or "overnight contact lenses to correct or control myopia." …. But particularly difficult cases of ortho-k can cost as much as $4,000.
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