Ophthalmic lenses having an extended depth of focus for improving intermediate vision
AssigneeAlcon Inc.
InventorsMyoung-Taek CHOI, Sangyeol LEE, Shinwook LEE, Wangkuen LEE
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Abstract
The present disclosure provides an ophthalmic lens (such as an IOL) that is designed to enhance depth of focus for intermediate vision performance, while maintaining distance vision. The lens may include an optic having an anterior surface and a posterior surface disposed about an optical axis. One of the surfaces (e.g., the anterior surface) may have a surface profile involving a superposition of at least three structures or profiles, including a base structure, a phase shift structure having an inner region, an outer region and a transition region, and a zonal structure having an inner power zone and an outer transition zone.
Claims20
An ophthalmic lens, comprising:
- an optic having an optical axis and a composite multi-layered surface profile corresponding to a superposition of at least three profiles comprising a phase shift structure, a zonal structure, and a base structure:
- the zonal structure having an inner power zone having a first curvature and an outer transition zone having a second curvature;
- and
- the base structure having a base curvature extending radially from the optical axis towards an outermost edge of the optic.
An ophthalmic lens, comprising:
- an optic having an optical axis and a composite multi-layered surface profile corresponding to a superposition of at least three profiles comprising a trapezoidal phase shift structure, a zonal structure, and a base structure:
- the zonal structure having an inner power zone having a first curvature and an outer transition zone having a second curvature;
- and
- the base structure having a base curvature extending radially from the optical axis towards an outermost edge of the optic.
An ophthalmic lens, comprising:
- an optic having an optical axis and a composite multi-layered surface profile corresponding to a superposition of at least three profiles comprising a phase shift structure, a zonal structure, and a base structure:
- the phase shift structure configured to progressively delay a wavefront to create extended depth-of-focus;
- the zonal structure comprising a higher refractive power than the base structure;
- and
- the base structure having a base curvature extending radially from the optical axis towards an outermost edge of the optic.
Dependencies are inferred from the claim text.