Patents Examined by Jason D. Vienrra-Eisenberg
  • Aspheric multifocal contact lens having concentric front surface
    Patent number: 5835187
    Abstract: The present invention relates to a multifocal contact lens having an edge, a front and back side and a series of concentrically arranged zones comprising central zone, a marginal zone and a peripheral zone. Each of the zones on the back side of the lens is defined by a second-order surface of revolution other than spherical. The front side of the lens comprises multiple spherical surfaces for providing increasing power correction from the central zone toward the peripheral zone.
    Type: Grant
    Filed: November 22, 1996
    Date of Patent: November 10, 1998
    Assignee: Wilmington Partners L.P.
    Inventor: Richard R. Martin