A - Human Necessities – 61 – F
Patent
A - Human Necessities
61
F
A61F 2/16 (2006.01)
Patent
CA 2590166
The present inventions provides an intraocular lens (IOL) having an optic with a posterior and an anterior refractive surfaces, at least one of which has an aspherical profile, typically characterized by a non-zero conic constant, for controlling the aberrations of a patient~s eye in which the IOL is implanted. Preferably, the IOL~s asphericity, together with the aberrations of the patient~s eye, cooperate to provide an image contrast characterized by a calculated modulation transfer function (MTF) of at least about o.25 and a depth of field of at least about o.75 diopters.
La présente invention concerne une lentille intraoculaire (intraocular lens / IOL) comprenant une optique qui présente des surfaces de réfraction postérieure et antérieure dont au moins l'une a un profil asphérique en général caractérisé par une constante conique non nulle, ladite lentille permettant de réguler les aberrations de l'oeil d'un patient chez qui l'IOL est implantée. De préférence, l'asphéricité et les aberrations de l'oeil du patient coopèrent pour fournir un contraste d'image qui se caractérise par une fonction de transfert de modulation (modulation transfer function / MTF) calculée d'au moins environ 0,25 et une profondeur de champ d'au moins environ 0,75 dioptries.
Alcon Inc.
Kirby Eades Gale Baker
LandOfFree
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