Optimal iol shape factors for human eyes

A - Human Necessities – 61 – F

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A61F 2/16 (2006.01) G02C 7/02 (2006.01)

Patent

CA 2567049

The present invention provides an ophthalmic lens (e.g., an intraocular lens) having an optic with an anterior surface and a posterior surface, which exhibits a shape factor (defined as a ratio of the sum of the anterior and posterior curvatures to the difference of such curvatures) in a range of about -0.5 to about 4. In a related aspect, the shape factor of the optic lies in a range of about 0 to about 2. The above shape factors give rise to a plurality of different lens shapes, such as concave-convex, plano-convex and plano-concave.

L'invention concerne une lentille ophtalmique (par exemple, une lentille intra-oculaire) qui comprend une optique présentant une surface antérieure et une surface postérieure, et dont le facteur de forme (défini comme étant le rapport entre la somme des courbures antérieure et postérieure et la différence desdites courbures) est situé dans la page comprise entre environ -0,5 et environ 4. Dans un aspect de l'invention, le facteur de forme de l'optique est situé dans une plage comprise entre environ 0 et environ 2. Lesdits facteurs de forme permettent d'obtenir une pluralité de formes de lentilles différentes, de type concave-convexe, plano-convexe et plano-concave.

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