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US 12,345,964 B2Granted
Toric contact lens stabilization design based on thickness gradients orthogonal to eyelid margin
AssigneeJohnson & Johnson Vision Care, Inc.
InventorBenjamin Straker
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Abstract
Ophthalmic lenses are described herein. An example ophthalmic lens may comprise a first surface. The example ophthalmic lens may comprise a second surface disposed opposite the first surface and defining a volume of lens material therebetween. A thickness profile of the volume of lens material may be derived from one or more eyelid profiles such that a thickness gradient of the volume of lens material is oriented to be substantially orthogonal to a target eyelid margin shape.
Claims20
A contact lens comprising:
- a first surface;
- a second surface disposed opposite the first surface and defining a volume of lens material therebetween having a varying thickness;
- said first and second surfaces being joined at a common round peripheral lens edge;
- and
- an optic zone positioned within the peripheral lens edge;
- wherein a maximum thickness profile of the lens substantially matches an upper target eyelid margin shape derived from data from one or more images of one or more eyelid profiles, and wherein a thickness gradient of said maximum thickness profile along its length is oriented to be orthogonal to said maximum thickness profile;
- wherein the maximum thickness profile extends continuously across the contact lens other than in said optic zone and at said peripheral lens edge;
- wherein the maximum thickness profile has mirror symmetry about a vertical axis of the lens;
- and
- wherein the maximum thickness profile has mirror symmetry about a horizontal axis of the lens.
7 more elements
A method for designing a contact lens comprising:
- obtaining data from one or more images of one or more eyelid profiles associated with one or more eyelids;
- determining a target upper eyelid margin shape from said data;
- designing a contact lens comprising a first surface and a second surface disposed opposite the first surface and defining a volume of lens material therebetween having a varying thickness, and a round peripheral lens edge, and an optic zone positioned within the peripheral lens edge,
- wherein a maximum thickness profile of said lens substantially matches said target upper eyelid margin shape and extends across said lens other than in said optic zone and at said peripheral lens edge, and wherein a thickness gradient of said maximum thickness profile along its length is oriented to be substantially orthogonal to the maximum thickness profile, and wherein the maximum thickness profile has mirror symmetry about a vertical axis of the lens, and wherein the maximum thickness profile has mirror symmetry about a horizontal axis of the lens.
1 more element
Dependencies are inferred from the claim text.