Soft lens orthokeratology

Details Soft lens orthokeratology Soft lens orthokeratology

G - Physics

02

C

G02C 7/04 (2006.01) A61F 9/00 (2006.01) A61F 9/013 (2006.01)

Patent

CA 2513485

A corneal reshaping by means of a soft contact lens to manipulate tear pressure gradient to produce a dimensional change to the surface profile of the cornea of the wearer to provide at least a temporary change in the refractive state of the eye eliminating the need for other refractive corrections. The contact lens has mechanical properties and/or a geometric shape such that when the lens is fitted to the eye the pressure applied to the eye via the lens will vary in a radial direction between at least one zone of higher pressure and at least one zone of lower pressure so that wearing the lens will over time cause a dimensional change to the surface layer of the cornea.

L'invention porte sur un remodelage de la cornée au moyen d'une lentille de contact souple afin de manipuler un gradient de pression de déchirement pour produire un changement dimensionnel du profil de surface de la cornée de l'utilisateur afin de changer au moins temporairement l'état réfractaire de l'oeil, ce qui rendent inutiles d'autres corrections de réfraction. Cette lentille de contact possède des propriétés mécaniques et/ou une forme géométrique telle que lorsque la lentille est adaptée à l'oeil, la pression appliquée sur l'oeil par la lentille varie dans un sens radial entre au moins une zone de pression supérieure et au mois une zone de pression inférieure si bien que le port de la lentille entraînera avec le temps un changement dimensionnel de la couche de surface de la cornée.

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