Rotationally stabilized contact lenses

G - Physics – 02 – C

Patent

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Details

G02C 7/04 (2006.01) B29D 11/00 (2006.01) G02C 13/00 (2006.01)

Patent

CA 2536147

The invention provides a lens in which the lens periphery is controlled as to each of thickness differential and both the rate of change from thinner to thicker regions and the shape of the transition from thinner to thicker regions within each of the dual thin zones. The lens of the invention substantially reduces the time for the lens' auto-positioning. Additionally, the lenses of the invention maintain their on-eye orientation better as compared to conventionally stabilized lenses.

L'invention concerne une lentille dont la périphérie est régulée quant à chacune des différences d'épaisseur et à la vitesse de changement des régions plus minces à celles plus épaisses et à la forme de la transition des régions plus minces à celles plus épaisses à l'intérieur des deux zones minces. La lentille selon l'invention réduit sensiblement le temps de positionnement automatique de la lentille. En outre, lesdites lentilles, lorsqu'elles sont portées, conservent une meilleure orientation en comparaison de celles qui sont stabilisées de manière classique.

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