Aspherical corneal implant

A - Human Necessities – 61 – F

Patent

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A61F 2/14 (2006.01)

Patent

CA 2563340

A corneal implant (10) having an aspheric surface (12) for modifying the cornea curvature and altering the corneal refractive power. The corneal implant has a lens body formed of an optically clear bio-compatible material, preferably with an index of refraction substantially similar to that of human corneal tissue (1.376). The aspheric surface is comprised of a continuous aspheric surface from the apex of the implant to beveled surface (20). The beveled surface, positioned near the outer diameter of the implant, is used to reduce the thickness of the aspheric surface on the periphery of the lens to the outer diameter edge. The body of the implant has a diameter between about 2.0 mm and 7.0 mm and a thickness less than about .150 mm.

Implant cornéen asphérique ayant une surface asphérique pour modifier la courbe de la cornée et le pouvoir de réfraction de la cornée. L'implant cornéen présente un corps de lentille formé à partir d'un matériau optique claire biocompatible, de préférence avec un indice de réfraction essentiellement similaire à celui du tissue cornéen humain. (1.376). La surface asphérique est composée d'une surface asphérique continue depuis l'apex de l'implant à la surface biseautée. La surface biseautée, positionnée proche du diamètre externe de l'implant est utilisée pour réduire l'épaisseur de la surface asphérique sur la périphérie de la lentille au bord diamétrale externe. Le corps de l'implant présente un diamètre compris entre 2,0 mm et 7,0 mm et une épaisseur inférieure à 0,150 mm.

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