Abstract: Disclosed are lenses and methods for verifying a lens with an induced aperture. The lenses can have a geometry that, among other things, maintains a centered position about a wearer's eye to prevent more than a permissible amount of movement of the lens relative to the eye. Further disclosed is a method for verifying the power profiles used with the lens, and a lens that can have a single power profile for a wide range of presbyopia.

Abstract: Disclosed are lenses and methods for verifying a lens with an induced aperture. The lenses can have a geometry that, among other things, maintains a centered position about a wearer's eye to prevent more than a permissible amount of movement of the lens relative to the eye. Further disclosed is a method for verifying the power profiles used with the lens, and a lens that can have a single power profile for a wide range of presbyopia.

Abstract: Disclosed are lenses and methods for verifying a lens with an induced aperture. The lenses can have a geometry that, among other things, maintains a centered position about a wearer's eye to prevent more than a permissible amount of movement of the lens relative to the eye. Further disclosed is a method for verifying the power profiles used with the lens, and a lens that can have a single power profile for a wide range of presbyopia.

Abstract: Disclosed are lenses and methods for verifying a lens with an induced aperture. The lenses can have a geometry that, among other things, maintains a centered position about a wearer's eye to prevent more than a permissible amount of movement of the lens relative to the eye. Further disclosed is a method for verifying the power profiles used with the lens, and a lens that can have a single power profile for a wide range of presbyopia.

Abstract: Disclosed are lenses and methods for verifying a lens with an induced aperture. The lenses can have a geometry that, among other things, maintains a centered position about a wearer's eye to prevent more than a permissible amount of movement of the lens relative to the eye. Further disclosed is a method for verifying the power profiles used with the lens, and a lens that can have a single power profile for a wide range of presbyopia.

Abstract: A multifocal contact lens includes a first, central zone for distance and intermediate vision and a second, outer zone for near vision. The first and second zones are conic sections joined tangentially at their junction. The power in the distance subregion is relatively constant, while the power throughout the intermediate subregion is a monotonically increasing function which reaches the near power correction at the junction. The second zone includes an aspheric surface having an eccentricity calculated to minimize or eliminate spherical aberration. The slope or power gradient in the intermediate subregion is calculated to provide a smooth transition from the lower power distance subregion to the junction between the intermediate subregion and the near power correction zone.

Abstract: A multifocal contact lens construction and a method for fabricating a contact lens. According to one embodiment a lens is formed with two focusing zones positioned about a center point. A first optic zone is formed in a center area of the lens, providing a first power correction for distance vision. A second optic zone is formed concentrically about and contiguous with the first optic zone. The second zone provides a second power correction for near vision. Preferably, the first power correction for distance vision is positioned in a most central inner portion of the first optic zone. The first optic zone also includes an outer portion contiguous with the inner portion and characterized by an increasing eccentricity.