Patent ID: 8216307
Filing Date: 2012-07-10
Classification: A61F

Abstract:
1. A diffractive, multifocal intraocular lens (IOL), comprising: an optic, the optic comprising a central diffractive region, an outer refractive region surrounding said central diffractive region, and a thin peripheral edge for aiding in insertion through a smaller incision during implantation surgery, said central diffractive region comprising a plurality of concentric steps of gradually varying step heights, and a plurality of radially segmented apodization zones, each radially segmented apodization zone having a unique focal length and a smoothly reduced step height operable to shift an energy balance from a near image to a distant image, the optic operable to pass optical energy in both photopic and mesopic conditions; a plurality of haptics coupled to the optic and operable to position the diffractive multifocal IOL within an eye, wherein the central diffractive region is operable to pass optical energy simultaneously to both near and distant focal points in bright optical conditions; and the outer refractive region is operable to pass optical energy to distance vision in dim optical conditions.