The Principle Of Orthokeratology

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Beside prescription eyeglasses, contact lenses and refractive surgeries, there is still another solution to vision problems. Corneal reshaping technology uses a gas permeable contact lens which stays on the cornea at night to reshape the cornea. Unlike other forms of contact lenses, dream lenses are worn at night when a wearer is sleeping or resting. This also explains its beautiful name. For certain groups of people such as athletes, using these special contact lenses is quite convenient because they are free from bothersome lenses during sports but they can still get clear vision. The primary principle behind these lenses is that they can reshape the cornea at night and provide corrected vision at day time. In fact, this corneal reshaping technology is formally named orthographic, which can be dated back to as early as the 1940s.

During the decades after the introduction of orthographic technology, there have been various technical improvements. And the invention of computer helped make it possible to generate new designs and obtain repeated results. And there have also been a whole string of companies and professionals participating in the ultimate development of orthokeratology lenses. The popularity of the research on this technology was best exemplified by the formation of the Orthokeratology Academy of America.

Nowadays, there are several companies whom are approved to make and design CRT (corneal refractive therapy) solutions. Paragon Vision Sciences provides the product marketed as Accelerated Orthokeratology. And Bausch & Lomb has four designs, including BE Retainer, Contex OK-E System, DreamLens and Emerald and Fargo. Until now, all orthokeratology lenses approved by FDA are gas permeable ones. A concerning problem is that there are some complications and side effects associated with these lenses. Improper use of hygiene or tap water will probably lead to unwanted effects. In addition, orthokeratology lenses made of wrong materials may cause easily the cornea to suffer lack of oxygen.

Related Articles:
Advantages and disadvantages of orthokeratology contacts
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The Principle Of Orthokeratology

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This article was published on 2011/01/29