Multizonal lens with enhanced performance

A - Human Necessities – 61 – F

Patent

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A61F 2/16 (2006.01)

Patent

CA 2753639

An intraocular lens for providing enhanced vision includes an optic having a clear aperture having an outer diameter. The optic has opposing first and second surfaces disposed about an optical axis, the first surface including a cross- sectional profile. The optic further includes central and outer zones that fill the entire clear aperture of the optic. The central zone is disposed about the optical axis having an outer diameter, the profile in the vicinity of the central zone having a constant radius of curvature or a radius of curvature that increases with increasing radius from the optical axis. The outer zone is disposed about the central zone, the profile in the outer zone having a base curvature with a base radius of curvature and a center of curvature, the profile in the outer zone characterized in that, as the distance from the optical axis increases, the distance from the center of curvature of the base curvature also increases.

L'invention porte sur une lentille intraoculaire destinée à fournir une vision améliorée, laquelle lentille comprend une optique présentant une ouverture efficace ayant un diamètre extérieur. L'optique comporte des première et seconde surfaces opposées disposées autour d'un axe optique, la première surface comprenant un profil en coupe transversale. L'optique comprend en outre des zones centrale et extérieure qui remplissent la totalité de l'ouverture efficace de l'optique. La zone centrale est disposée autour de l'axe optique ayant un diamètre extérieur, le profil au voisinage de la zone centrale ayant un rayon de courbure constant ou un rayon de courbure augmentant avec un rayon croissant à partir de l'axe optique. La zone extérieure est disposée autour de la zone centrale, le profil de la zone extérieure ayant une courbure de base avec un rayon de courbure de base et un centre de courbure, le profil dans la zone extérieure étant caractérisé en ce que, à mesure que la distance à partir de l'axe optique augmente, la distance à partir du centre de courbure de la courbure de base augmente également.

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