Toric multifocal contact lenses

G - Physics – 02 – C

Patent

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Details

G02C 7/04 (2006.01) G02C 7/02 (2006.01)

Patent

CA 2493448

The present invention provides a toric multifocal contact lens having a cylindrical optical power to correct astigmatism vision errors and a multifocal power to compensate for presbyopia. A toric multifocal contact lens of the invention has a central axis, an anterior surface having a first central optical zone, and an opposite posterior surface having a second central optical zone. The first central optical zone and the second central optical zone combine to provide a cylindrical optical power to correct astigmatism vision errors and a multifocal power to compensate for presbyopia.

La présente invention porte sur une lentille de contact torique multifocale ayant une surface optique cylindrique pour corriger l'astigmatisme et une puissance multifocale pour compenser la presbytie. La lentille de contact torique, multifocale de cette invention comporte un axe central, une surface antérieure comportant une première zone optique centrale et une surface postérieure opposée comportant une seconde zone optique centrale. La première zone optique centrale et la seconde zone optique centrale sont combinées de façon à créer une puissance optique cylindrique pour corriger les erreurs de vision dues à l'astigmatisme et une puissance multifocale pour compenser la presbytie.

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